diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
deleted file mode 100644
index fcb2689..0000000
--- a/.github/workflows/lint.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: lint
-on: push
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-      with:
-        python-version: "3.11.0"      
-    - name: Install poetry
-      uses: abatilo/actions-poetry@v2
-      with:
-        poetry-version: 1.2.2
-    - name: Install dependencies
-      run: poetry install
-    - name: Run flake8
-      uses: julianwachholz/flake8-action@v2
-      with:
-        checkName: "Python Lint"
-        path: .
-        plugins: flake8-spellcheck
-        config: flake8.ini
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.pylintrc b/.pylintrc
new file mode 100644
index 0000000..51832a5
--- /dev/null
+++ b/.pylintrc
@@ -0,0 +1,622 @@
+[MAIN]
+
+# Analyse import fallback blocks. This can be used to support both Python 2 and
+# 3 compatible code, which means that the block might have code that exists
+# only in one or another interpreter, leading to false positives when analysed.
+analyse-fallback-blocks=no
+
+# Load and enable all available extensions. Use --list-extensions to see a list
+# all available extensions.
+#enable-all-extensions=
+
+# In error mode, messages with a category besides ERROR or FATAL are
+# suppressed, and no reports are done by default. Error mode is compatible with
+# disabling specific errors.
+#errors-only=
+
+# Always return a 0 (non-error) status code, even if lint errors are found.
+# This is primarily useful in continuous integration scripts.
+#exit-zero=
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code.
+extension-pkg-allow-list=
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code. (This is an alternative name to extension-pkg-allow-list
+# for backward compatibility.)
+extension-pkg-whitelist=
+
+# Return non-zero exit code if any of these messages/categories are detected,
+# even if score is above --fail-under value. Syntax same as enable. Messages
+# specified are enabled, while categories only check already-enabled messages.
+fail-on=
+
+# Specify a score threshold under which the program will exit with error.
+fail-under=10
+
+# Interpret the stdin as a python script, whose filename needs to be passed as
+# the module_or_package argument.
+#from-stdin=
+
+# Files or directories to be skipped. They should be base names, not paths.
+ignore=CVS
+
+# Add files or directories matching the regular expressions patterns to the
+# ignore-list. The regex matches against paths and can be in Posix or Windows
+# format. Because '\' represents the directory delimiter on Windows systems, it
+# can't be used as an escape character.
+ignore-paths=
+
+# Files or directories matching the regular expression patterns are skipped.
+# The regex matches against base names, not paths. The default value ignores
+# Emacs file locks
+ignore-patterns=^\.#
+
+# List of module names for which member attributes should not be checked
+# (useful for modules/projects where namespaces are manipulated during runtime
+# and thus existing member attributes cannot be deduced by static analysis). It
+# supports qualified module names, as well as Unix pattern matching.
+ignored-modules=
+
+# Python code to execute, usually for sys.path manipulation such as
+# pygtk.require().
+#init-hook=
+
+# Use multiple processes to speed up Pylint. Specifying 0 will auto-detect the
+# number of processors available to use, and will cap the count on Windows to
+# avoid hangs.
+jobs=1
+
+# Control the amount of potential inferred values when inferring a single
+# object. This can help the performance when dealing with large functions or
+# complex, nested conditions.
+limit-inference-results=100
+
+# List of plugins (as comma separated values of python module names) to load,
+# usually to register additional checkers.
+load-plugins=
+
+# Pickle collected data for later comparisons.
+persistent=yes
+
+# Minimum Python version to use for version dependent checks. Will default to
+# the version used to run pylint.
+py-version=3.11
+
+# Discover python modules and packages in the file system subtree.
+recursive=no
+
+# When enabled, pylint would attempt to guess common misconfiguration and emit
+# user-friendly hints instead of false-positive error messages.
+suggestion-mode=yes
+
+# Allow loading of arbitrary C extensions. Extensions are imported into the
+# active Python interpreter and may run arbitrary code.
+unsafe-load-any-extension=no
+
+# In verbose mode, extra non-checker-related info will be displayed.
+#verbose=
+
+
+[BASIC]
+
+# Naming style matching correct argument names.
+argument-naming-style=snake_case
+
+# Regular expression matching correct argument names. Overrides argument-
+# naming-style. If left empty, argument names will be checked with the set
+# naming style.
+#argument-rgx=
+
+# Naming style matching correct attribute names.
+attr-naming-style=snake_case
+
+# Regular expression matching correct attribute names. Overrides attr-naming-
+# style. If left empty, attribute names will be checked with the set naming
+# style.
+#attr-rgx=
+
+# Bad variable names which should always be refused, separated by a comma.
+bad-names=foo,
+          bar,
+          baz,
+          toto,
+          tutu,
+          tata
+
+# Bad variable names regexes, separated by a comma. If names match any regex,
+# they will always be refused
+bad-names-rgxs=
+
+# Naming style matching correct class attribute names.
+class-attribute-naming-style=any
+
+# Regular expression matching correct class attribute names. Overrides class-
+# attribute-naming-style. If left empty, class attribute names will be checked
+# with the set naming style.
+#class-attribute-rgx=
+
+# Naming style matching correct class constant names.
+class-const-naming-style=UPPER_CASE
+
+# Regular expression matching correct class constant names. Overrides class-
+# const-naming-style. If left empty, class constant names will be checked with
+# the set naming style.
+#class-const-rgx=
+
+# Naming style matching correct class names.
+class-naming-style=PascalCase
+
+# Regular expression matching correct class names. Overrides class-naming-
+# style. If left empty, class names will be checked with the set naming style.
+#class-rgx=
+
+# Naming style matching correct constant names.
+const-naming-style=UPPER_CASE
+
+# Regular expression matching correct constant names. Overrides const-naming-
+# style. If left empty, constant names will be checked with the set naming
+# style.
+#const-rgx=
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=-1
+
+# Naming style matching correct function names.
+function-naming-style=snake_case
+
+# Regular expression matching correct function names. Overrides function-
+# naming-style. If left empty, function names will be checked with the set
+# naming style.
+#function-rgx=
+
+# Good variable names which should always be accepted, separated by a comma.
+good-names=i,
+           j,
+           k,
+           ex,
+           Run,
+           _
+
+# Good variable names regexes, separated by a comma. If names match any regex,
+# they will always be accepted
+good-names-rgxs=
+
+# Include a hint for the correct naming format with invalid-name.
+include-naming-hint=no
+
+# Naming style matching correct inline iteration names.
+inlinevar-naming-style=any
+
+# Regular expression matching correct inline iteration names. Overrides
+# inlinevar-naming-style. If left empty, inline iteration names will be checked
+# with the set naming style.
+#inlinevar-rgx=
+
+# Naming style matching correct method names.
+method-naming-style=snake_case
+
+# Regular expression matching correct method names. Overrides method-naming-
+# style. If left empty, method names will be checked with the set naming style.
+#method-rgx=
+
+# Naming style matching correct module names.
+module-naming-style=snake_case
+
+# Regular expression matching correct module names. Overrides module-naming-
+# style. If left empty, module names will be checked with the set naming style.
+#module-rgx=
+
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
+
+# Regular expression which should only match function or class names that do
+# not require a docstring.
+no-docstring-rgx=^_
+
+# List of decorators that produce properties, such as abc.abstractproperty. Add
+# to this list to register other decorators that produce valid properties.
+# These decorators are taken in consideration only for invalid-name.
+property-classes=abc.abstractproperty
+
+# Regular expression matching correct type variable names. If left empty, type
+# variable names will be checked with the set naming style.
+#typevar-rgx=
+
+# Naming style matching correct variable names.
+variable-naming-style=snake_case
+
+# Regular expression matching correct variable names. Overrides variable-
+# naming-style. If left empty, variable names will be checked with the set
+# naming style.
+#variable-rgx=
+
+
+[CLASSES]
+
+# Warn about protected attribute access inside special methods
+check-protected-access-in-special-methods=no
+
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,
+                      __new__,
+                      setUp,
+                      __post_init__
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,
+                  _fields,
+                  _replace,
+                  _source,
+                  _make
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls
+
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=cls
+
+
+[DESIGN]
+
+# List of regular expressions of class ancestor names to ignore when counting
+# public methods (see R0903)
+exclude-too-few-public-methods=
+
+# List of qualified class names to ignore when counting class parents (see
+# R0901)
+ignored-parents=
+
+# Maximum number of arguments for function / method.
+max-args=5
+
+# Maximum number of attributes for a class (see R0902).
+max-attributes=7
+
+# Maximum number of boolean expressions in an if statement (see R0916).
+max-bool-expr=5
+
+# Maximum number of branch for function / method body.
+max-branches=12
+
+# Maximum number of locals for function / method body.
+max-locals=15
+
+# Maximum number of parents for a class (see R0901).
+max-parents=7
+
+# Maximum number of public methods for a class (see R0904).
+max-public-methods=20
+
+# Maximum number of return / yield for function / method body.
+max-returns=6
+
+# Maximum number of statements in function / method body.
+max-statements=50
+
+# Minimum number of public methods for a class (see R0903).
+min-public-methods=2
+
+
+[EXCEPTIONS]
+
+# Exceptions that will emit a warning when caught.
+overgeneral-exceptions=BaseException,
+                       Exception
+
+
+[FORMAT]
+
+# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
+expected-line-ending-format=
+
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=^\s*(# )?<?https?://\S+>?$
+
+# Number of spaces of indent required inside a hanging or continued line.
+indent-after-paren=4
+
+# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
+# tab).
+indent-string='    '
+
+# Maximum number of characters on a single line.
+max-line-length=100
+
+# Maximum number of lines in a module.
+max-module-lines=1000
+
+# Allow the body of a class to be on the same line as the declaration if body
+# contains single statement.
+single-line-class-stmt=no
+
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=no
+
+
+[IMPORTS]
+
+# List of modules that can be imported at any level, not just the top level
+# one.
+allow-any-import-level=
+
+# Allow wildcard imports from modules that define __all__.
+allow-wildcard-with-all=no
+
+# Deprecated modules which should not be used, separated by a comma.
+deprecated-modules=
+
+# Output a graph (.gv or any supported image format) of external dependencies
+# to the given file (report RP0402 must not be disabled).
+ext-import-graph=
+
+# Output a graph (.gv or any supported image format) of all (i.e. internal and
+# external) dependencies to the given file (report RP0402 must not be
+# disabled).
+import-graph=
+
+# Output a graph (.gv or any supported image format) of internal dependencies
+# to the given file (report RP0402 must not be disabled).
+int-import-graph=
+
+# Force import order to recognize a module as part of the standard
+# compatibility libraries.
+known-standard-library=
+
+# Force import order to recognize a module as part of a third party library.
+known-third-party=enchant
+
+# Couples of modules and preferred modules, separated by a comma.
+preferred-modules=
+
+
+[LOGGING]
+
+# The type of string formatting that logging methods do. `old` means using %
+# formatting, `new` is for `{}` formatting.
+logging-format-style=old
+
+# Logging modules to check that the string format arguments are in logging
+# function parameter format.
+logging-modules=logging
+
+
+[MESSAGES CONTROL]
+
+# Only show warnings with the listed confidence levels. Leave empty to show
+# all. Valid levels: HIGH, CONTROL_FLOW, INFERENCE, INFERENCE_FAILURE,
+# UNDEFINED.
+confidence=HIGH,
+           CONTROL_FLOW,
+           INFERENCE,
+           INFERENCE_FAILURE,
+           UNDEFINED
+
+# Disable the message, report, category or checker with the given id(s). You
+# can either give multiple identifiers separated by comma (,) or put this
+# option multiple times (only on the command line, not in the configuration
+# file where it should appear only once). You can also use "--disable=all" to
+# disable everything first and then re-enable specific checks. For example, if
+# you want to run only the similarities checker, you can use "--disable=all
+# --enable=similarities". If you want to run only the classes checker, but have
+# no Warning level messages displayed, use "--disable=all --enable=classes
+# --disable=W".
+disable=raw-checker-failed,
+        bad-inline-option,
+        locally-disabled,
+        file-ignored,
+        suppressed-message,
+        useless-suppression,
+        deprecated-pragma,
+        use-symbolic-message-instead,
+        missing-module-docstring,
+        missing-class-docstring,
+        missing-function-docstring,
+        too-few-public-methods
+
+# Enable the message, report, category or checker with the given id(s). You can
+# either give multiple identifier separated by comma (,) or put this option
+# multiple time (only on the command line, not in the configuration file where
+# it should appear only once). See also the "--disable" option for examples.
+enable=c-extension-no-member
+
+
+[METHOD_ARGS]
+
+# List of qualified names (i.e., library.method) which require a timeout
+# parameter e.g. 'requests.api.get,requests.api.post'
+timeout-methods=requests.api.delete,requests.api.get,requests.api.head,requests.api.options,requests.api.patch,requests.api.post,requests.api.put,requests.api.request
+
+
+[MISCELLANEOUS]
+
+# List of note tags to take in consideration, separated by a comma.
+notes=FIXME,
+      XXX,
+      TODO
+
+# Regular expression of note tags to take in consideration.
+notes-rgx=
+
+
+[REFACTORING]
+
+# Maximum number of nested blocks for function / method body
+max-nested-blocks=5
+
+# Complete name of functions that never returns. When checking for
+# inconsistent-return-statements if a never returning function is called then
+# it will be considered as an explicit return statement and no message will be
+# printed.
+never-returning-functions=sys.exit,argparse.parse_error
+
+
+[REPORTS]
+
+# Python expression which should return a score less than or equal to 10. You
+# have access to the variables 'fatal', 'error', 'warning', 'refactor',
+# 'convention', and 'info' which contain the number of messages in each
+# category, as well as 'statement' which is the total number of statements
+# analyzed. This score is used by the global evaluation report (RP0004).
+evaluation=max(0, 0 if fatal else 10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10))
+
+# Template used to display messages. This is a python new-style format string
+# used to format the message information. See doc for all details.
+msg-template=
+
+# Set the output format. Available formats are text, parseable, colorized, json
+# and msvs (visual studio). You can also give a reporter class, e.g.
+# mypackage.mymodule.MyReporterClass.
+#output-format=
+
+# Tells whether to display a full report or only the messages.
+reports=no
+
+# Activate the evaluation score.
+score=yes
+
+
+[SIMILARITIES]
+
+# Comments are removed from the similarity computation
+ignore-comments=yes
+
+# Docstrings are removed from the similarity computation
+ignore-docstrings=yes
+
+# Imports are removed from the similarity computation
+ignore-imports=yes
+
+# Signatures are removed from the similarity computation
+ignore-signatures=yes
+
+# Minimum lines number of a similarity.
+min-similarity-lines=4
+
+
+[SPELLING]
+
+# Limits count of emitted suggestions for spelling mistakes.
+max-spelling-suggestions=4
+
+# Spelling dictionary name. Available dictionaries: none. To make it work,
+# install the 'python-enchant' package.
+spelling-dict=
+
+# List of comma separated words that should be considered directives if they
+# appear at the beginning of a comment and should not be checked.
+spelling-ignore-comment-directives=fmt: on,fmt: off,noqa:,noqa,nosec,isort:skip,mypy:
+
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
+
+# A path to a file that contains the private dictionary; one word per line.
+spelling-private-dict-file=
+
+# Tells whether to store unknown words to the private dictionary (see the
+# --spelling-private-dict-file option) instead of raising a message.
+spelling-store-unknown-words=no
+
+
+[STRING]
+
+# This flag controls whether inconsistent-quotes generates a warning when the
+# character used as a quote delimiter is used inconsistently within a module.
+check-quote-consistency=no
+
+# This flag controls whether the implicit-str-concat should generate a warning
+# on implicit string concatenation in sequences defined over several lines.
+check-str-concat-over-line-jumps=no
+
+
+[TYPECHECK]
+
+# List of decorators that produce context managers, such as
+# contextlib.contextmanager. Add to this list to register other decorators that
+# produce valid context managers.
+contextmanager-decorators=contextlib.contextmanager
+
+# List of members which are set dynamically and missed by pylint inference
+# system, and so shouldn't trigger E1101 when accessed. Python regular
+# expressions are accepted.
+generated-members=
+
+# Tells whether to warn about missing members when the owner of the attribute
+# is inferred to be None.
+ignore-none=yes
+
+# This flag controls whether pylint should warn about no-member and similar
+# checks whenever an opaque object is returned when inferring. The inference
+# can return multiple potential results while evaluating a Python object, but
+# some branches might not be evaluated, which results in partial inference. In
+# that case, it might be useful to still emit no-member and other checks for
+# the rest of the inferred objects.
+ignore-on-opaque-inference=yes
+
+# List of symbolic message names to ignore for Mixin members.
+ignored-checks-for-mixins=no-member,
+                          not-async-context-manager,
+                          not-context-manager,
+                          attribute-defined-outside-init
+
+# List of class names for which member attributes should not be checked (useful
+# for classes with dynamically set attributes). This supports the use of
+# qualified names.
+ignored-classes=optparse.Values,thread._local,_thread._local,argparse.Namespace
+
+# Show a hint with possible names when a member name was not found. The aspect
+# of finding the hint is based on edit distance.
+missing-member-hint=yes
+
+# The minimum edit distance a name should have in order to be considered a
+# similar match for a missing member name.
+missing-member-hint-distance=1
+
+# The total number of similar names that should be taken in consideration when
+# showing a hint for a missing member.
+missing-member-max-choices=1
+
+# Regex pattern to define which classes are considered mixins.
+mixin-class-rgx=.*[Mm]ixin
+
+# List of decorators that change the signature of a decorated function.
+signature-mutators=
+
+
+[VARIABLES]
+
+# List of additional names supposed to be defined in builtins. Remember that
+# you should avoid defining new builtins when possible.
+additional-builtins=
+
+# Tells whether unused global variables should be treated as a violation.
+allow-global-unused-variables=yes
+
+# List of names allowed to shadow builtins
+allowed-redefined-builtins=
+
+# List of strings which can identify a callback function by name. A callback
+# name must start or end with one of those strings.
+callbacks=cb_,
+          _cb
+
+# A regular expression matching the name of dummy variables (i.e. expected to
+# not be used).
+dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
+
+# Argument names that match this expression will be ignored.
+ignored-argument-names=_.*|^ignored_|^unused_
+
+# Tells whether we should check for unused import in __init__ files.
+init-import=no
+
+# List of qualified module names which can have objects that can redefine
+# builtins.
+redefining-builtins-modules=six.moves,past.builtins,future.builtins,builtins,io
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..4ee41ee
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,15 @@
+all: black test typehint lint 
+
+black:
+	isort --multi-line 3 --profile black stacosys/
+	black stacosys/
+
+test:
+	pytest
+
+typehint: 
+	mypy --ignore-missing-imports stacosys/
+
+lint:
+	pylint stacosys/
+
diff --git a/poetry.lock b/poetry.lock
index 010c9fa..2842c27 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -26,12 +26,16 @@ twisted = ["twisted"]
 zookeeper = ["kazoo"]
 
 [[package]]
-name = "atomicwrites"
-version = "1.4.1"
-description = "Atomic file writes."
+name = "astroid"
+version = "2.12.12"
+description = "An abstract syntax tree for Python with inference support."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.7.2"
+
+[package.dependencies]
+lazy-object-proxy = ">=1.4.0"
+wrapt = {version = ">=1.14,<2", markers = "python_version >= \"3.11\""}
 
 [[package]]
 name = "attrs"
@@ -121,6 +125,9 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
+[package.dependencies]
+toml = {version = "*", optional = true, markers = "extra == \"toml\""}
+
 [package.extras]
 toml = ["toml"]
 
@@ -140,6 +147,17 @@ requests = ">=1.0.0"
 [package.extras]
 yaml = ["PyYAML (>=3.10)"]
 
+[[package]]
+name = "dill"
+version = "0.3.6"
+description = "serialize all of python"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+graph = ["objgraph (>=1.7.2)"]
+
 [[package]]
 name = "distlib"
 version = "0.3.6"
@@ -231,6 +249,20 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "isort"
+version = "5.10.1"
+description = "A Python utility / library to sort Python imports."
+category = "dev"
+optional = false
+python-versions = ">=3.6.1,<4.0"
+
+[package.extras]
+colors = ["colorama (>=0.4.3,<0.5.0)"]
+pipfile-deprecated-finder = ["pipreqs", "requirementslib"]
+plugins = ["setuptools"]
+requirements-deprecated-finder = ["pip-api", "pipreqs"]
+
 [[package]]
 name = "itsdangerous"
 version = "2.1.2"
@@ -253,6 +285,14 @@ MarkupSafe = ">=2.0"
 [package.extras]
 i18n = ["Babel (>=2.7)"]
 
+[[package]]
+name = "lazy-object-proxy"
+version = "1.8.0"
+description = "A fast and thorough lazy object proxy."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
 [[package]]
 name = "markdown"
 version = "3.4.1"
@@ -282,19 +322,19 @@ python-versions = ">=3.6"
 
 [[package]]
 name = "mypy"
-version = "0.942"
+version = "0.991"
 description = "Optional static typing for Python"
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3"
-tomli = ">=1.1.0"
 typing-extensions = ">=3.10"
 
 [package.extras]
 dmypy = ["psutil (>=4.0)"]
+install-types = ["pip"]
 python2 = ["typed-ast (>=1.4.0,<2)"]
 reports = ["lxml"]
 
@@ -381,6 +421,27 @@ category = "dev"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "pylint"
+version = "2.15.6"
+description = "python code static checker"
+category = "dev"
+optional = false
+python-versions = ">=3.7.2"
+
+[package.dependencies]
+astroid = ">=2.12.12,<=2.14.0-dev0"
+colorama = {version = ">=0.4.5", markers = "sys_platform == \"win32\""}
+dill = ">=0.2"
+isort = ">=4.2.5,<6"
+mccabe = ">=0.6,<0.8"
+platformdirs = ">=2.2.0"
+tomlkit = ">=0.10.1"
+
+[package.extras]
+spelling = ["pyenchant (>=3.2,<4.0)"]
+testutils = ["gitpython (>3)"]
+
 [[package]]
 name = "pyparsing"
 version = "3.0.9"
@@ -402,37 +463,33 @@ python-versions = "*"
 
 [[package]]
 name = "pytest"
-version = "6.2.5"
+version = "7.2.0"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.dependencies]
-atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
-py = ">=1.8.2"
-toml = "*"
 
 [package.extras]
-testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
 [[package]]
 name = "pytest-cov"
-version = "2.12.1"
+version = "4.0.0"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.6"
 
 [package.dependencies]
-coverage = ">=5.2.1"
+coverage = {version = ">=5.2.1", extras = ["toml"]}
 pytest = ">=4.6"
-toml = "*"
 
 [package.extras]
 testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
@@ -476,7 +533,7 @@ use-chardet-on-py3 = ["chardet (>=3.0.2,<6)"]
 
 [[package]]
 name = "setuptools"
-version = "65.5.1"
+version = "65.6.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
 category = "main"
 optional = false
@@ -511,6 +568,14 @@ category = "dev"
 optional = false
 python-versions = ">=3.7"
 
+[[package]]
+name = "tomlkit"
+version = "0.11.6"
+description = "Style preserving TOML library"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [[package]]
 name = "tox"
 version = "3.27.1"
@@ -532,6 +597,14 @@ virtualenv = ">=16.0.0,<20.0.0 || >20.0.0,<20.0.1 || >20.0.1,<20.0.2 || >20.0.2,
 docs = ["pygments-github-lexers (>=0.0.5)", "sphinx (>=2.0.0)", "sphinxcontrib-autoprogram (>=0.1.5)", "towncrier (>=18.5.0)"]
 testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "pathlib2 (>=2.3.3)", "psutil (>=5.6.1)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)"]
 
+[[package]]
+name = "types-markdown"
+version = "3.4.2.1"
+description = "Typing stubs for Markdown"
+category = "main"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "typing-extensions"
 version = "4.4.0"
@@ -608,18 +681,27 @@ MarkupSafe = ">=2.1.1"
 [package.extras]
 watchdog = ["watchdog"]
 
+[[package]]
+name = "wrapt"
+version = "1.14.1"
+description = "Module for decorators, wrappers and monkey patching."
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+
 [metadata]
 lock-version = "1.1"
 python-versions = "~3.11"
-content-hash = "ae1b03e2363b31597bef4cbb441218e1750e9747115e61dd91898400973771c6"
+content-hash = "94614b000f5848489ed0e32caf25a06df9daa05bc063d0e2fe03a00f6859d27b"
 
 [metadata.files]
 apscheduler = [
     {file = "APScheduler-3.9.1.post1-py2.py3-none-any.whl", hash = "sha256:c8c618241dbb2785ed5a687504b14cb1851d6f7b5a4edf3a51e39cc6a069967a"},
     {file = "APScheduler-3.9.1.post1.tar.gz", hash = "sha256:b2bea0309569da53a7261bfa0ce19c67ddbfe151bda776a6a907579fdbd3eb2a"},
 ]
-atomicwrites = [
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+astroid = [
+    {file = "astroid-2.12.12-py3-none-any.whl", hash = "sha256:72702205200b2a638358369d90c222d74ebc376787af8fb2f7f2a86f7b5cc85f"},
+    {file = "astroid-2.12.12.tar.gz", hash = "sha256:1c00a14f5a3ed0339d38d2e2e5b74ea2591df5861c0936bb292b84ccf3a78d83"},
 ]
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@@ -726,6 +808,10 @@ coveralls = [
     {file = "coveralls-3.3.1-py2.py3-none-any.whl", hash = "sha256:f42015f31d386b351d4226389b387ae173207058832fbf5c8ec4b40e27b16026"},
     {file = "coveralls-3.3.1.tar.gz", hash = "sha256:b32a8bb5d2df585207c119d6c01567b81fba690c9c10a753bfe27a335bfc43ea"},
 ]
+dill = [
+    {file = "dill-0.3.6-py3-none-any.whl", hash = "sha256:a07ffd2351b8c678dfc4a856a3005f8067aea51d6ba6c700796a4d9e280f39f0"},
+    {file = "dill-0.3.6.tar.gz", hash = "sha256:e5db55f3687856d8fbdab002ed78544e1c4559a130302693d839dfe8f93f2373"},
+]
 distlib = [
     {file = "distlib-0.3.6-py2.py3-none-any.whl", hash = "sha256:f35c4b692542ca110de7ef0bea44d73981caeb34ca0b9b6b2e6d7790dda8f80e"},
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@@ -757,6 +843,10 @@ iniconfig = [
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     {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
 ]
+isort = [
+    {file = "isort-5.10.1-py3-none-any.whl", hash = "sha256:6f62d78e2f89b4500b080fe3a81690850cd254227f27f75c3a0c491a1f351ba7"},
+    {file = "isort-5.10.1.tar.gz", hash = "sha256:e8443a5e7a020e9d7f97f1d7d9cd17c88bcb3bc7e218bf9cf5095fe550be2951"},
+]
 itsdangerous = [
     {file = "itsdangerous-2.1.2-py3-none-any.whl", hash = "sha256:2c2349112351b88699d8d4b6b075022c0808887cb7ad10069318a8b0bc88db44"},
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@@ -765,6 +855,27 @@ jinja2 = [
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 ]
+lazy-object-proxy = [
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+    {file = "lazy_object_proxy-1.8.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:4fd031589121ad46e293629b39604031d354043bb5cdf83da4e93c2d7f3389fe"},
+    {file = "lazy_object_proxy-1.8.0-cp310-cp310-win32.whl", hash = "sha256:b70d6e7a332eb0217e7872a73926ad4fdc14f846e85ad6749ad111084e76df25"},
+    {file = "lazy_object_proxy-1.8.0-cp310-cp310-win_amd64.whl", hash = "sha256:eb329f8d8145379bf5dbe722182410fe8863d186e51bf034d2075eb8d85ee25b"},
+    {file = "lazy_object_proxy-1.8.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:4e2d9f764f1befd8bdc97673261b8bb888764dfdbd7a4d8f55e4fbcabb8c3fb7"},
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+    {file = "lazy_object_proxy-1.8.0-pp37-pypy37_pp73-any.whl", hash = "sha256:ae032743794fba4d171b5b67310d69176287b5bf82a21f588282406a79498891"},
+    {file = "lazy_object_proxy-1.8.0-pp38-pypy38_pp73-any.whl", hash = "sha256:7e1561626c49cb394268edd00501b289053a652ed762c58e1081224c8d881cec"},
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+]
 markdown = [
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@@ -816,29 +927,36 @@ mccabe = [
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 ]
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+    {file = "wrapt-1.14.1.tar.gz", hash = "sha256:380a85cf89e0e69b7cfbe2ea9f765f004ff419f34194018a6827ac0e3edfed4d"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index d8d8746..d1ec3da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,14 +17,15 @@ peewee = "^3.14.8"
 tox = "^3.24.5"
 background = "^0.2.1"
 Flask = "^2.1.1"
+types-markdown = "^3.4.2.1"
 
-[tool.poetry.dev-dependencies]
-mypy = "^0.942"
-flake8-black = "^0.3.2"
-black = "^22.3.0"
-pytest = "^6.2.4"
-pytest-cov = "^2.12.1"
-coveralls = "^3.2.0"
+[tool.poetry.group.dev.dependencies]
+pylint = "^2.15.5"
+mypy = "^0.991"
+pytest = "^7.2.0"
+coveralls = "^3.3.1"
+flake8-black = "^0.3.4"
+pytest-cov = "^4.0.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/run.sh b/run.sh
index 3ee772c..fb544ec 100755
--- a/run.sh
+++ b/run.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
-python3 run.py "$@"
+python3 stacosys/run.py "$@"
 
diff --git a/stacosys.code-workspace b/stacosys.code-workspace
deleted file mode 100644
index 876a149..0000000
--- a/stacosys.code-workspace
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-	"folders": [
-		{
-			"path": "."
-		}
-	],
-	"settings": {}
-}
\ No newline at end of file
diff --git a/stacosys.sublime-project b/stacosys.sublime-project
new file mode 100644
index 0000000..7d00994
--- /dev/null
+++ b/stacosys.sublime-project
@@ -0,0 +1,19 @@
+{
+	"folders":
+	[
+		{
+			"path": ".",
+            "folder_exclude_patterns": ["__pycache__",".pytest_cache", ".mypy_cache"],
+            "file_exclude_patterns": [".coverage"]            
+		}
+	],
+   "settings": {
+      "LSP": {
+         "LSP-pyright": {
+            "settings": {
+               "python.analysis.diagnosticMode": "workspace"
+            }
+         }
+      }
+   }	
+}
diff --git a/stacosys.sublime-workspace b/stacosys.sublime-workspace
new file mode 100644
index 0000000..21684d5
--- /dev/null
+++ b/stacosys.sublime-workspace
@@ -0,0 +1,975 @@
+{
+	"auto_complete":
+	{
+		"selected_items":
+		[
+			[
+				"get",
+				"get_int"
+			]
+		]
+	},
+	"buffers":
+	[
+		{
+			"file": "run.sh",
+			"settings":
+			{
+				"buffer_size": 40,
+				"encoding": "UTF-8",
+				"line_ending": "Unix"
+			}
+		},
+		{
+			"file": "stacosys/run.py",
+			"settings":
+			{
+				"buffer_size": 3298,
+				"encoding": "UTF-8",
+				"line_ending": "Unix"
+			},
+			"undo_stack":
+			[
+				[
+					34,
+					1,
+					"insert",
+					{
+						"characters": "no"
+					},
+					"AgAAAOcFAAAAAAAA6AUAAAAAAAAAAAAA6AUAAAAAAADpBQAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADnBQAAAAAAAOcFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					35,
+					1,
+					"insert",
+					{
+						"characters": " "
+					},
+					"AQAAAOkFAAAAAAAA6gUAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADpBQAAAAAAAOkFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					36,
+					1,
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+						"characters": "r"
+					},
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADpBQAAAAAAAOkFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					38,
+					1,
+					"insert",
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+						"characters": " "
+					},
+					"AQAAAOoFAAAAAAAA6wUAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADqBQAAAAAAAOoFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					39,
+					1,
+					"paste",
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+					"AQAAAOsFAAAAAAAA9gUAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADrBQAAAAAAAOsFAAAAAAAAAAAAAAAA8L8"
+				],
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+					40,
+					1,
+					"insert",
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+						"characters": " or"
+					},
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAD2BQAAAAAAAPYFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					41,
+					1,
+					"insert",
+					{
+						"characters": " "
+					},
+					"AQAAAPkFAAAAAAAA+gUAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAD5BQAAAAAAAPkFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					46,
+					1,
+					"left_delete",
+					null,
+					"AQAAAOkFAAAAAAAA6QUAAAAAAAABAAAAcg",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADqBQAAAAAAAOoFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					47,
+					1,
+					"insert",
+					{
+						"characters": "t"
+					},
+					"AQAAAOkFAAAAAAAA6gUAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADpBQAAAAAAAOkFAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					59,
+					1,
+					"insert_completion",
+					{
+						"completion": "lsp_select_completion_item {\"session_name\":\"LSP-pyright\",\"item\":{\"label\":\"get_int\",\"data\":{\"workspacePath\":\"/home/yannic/work/stacosys\",\"position\":{\"character\":21,\"line\":91},\"symbolLabel\":\"get_int\",\"filePath\":\"/home/yannic/work/stacosys/stacosys/run.py\"},\"kind\":2,\"sortText\":\"09.9999.get_int\"}}",
+						"format": "command",
+						"keep_prefix": false,
+						"must_insert": false,
+						"trigger": "get_int"
+					},
+					"AgAAAMgLAAAAAAAAyAsAAAAAAAADAAAAZ2V0yAsAAAAAAADPCwAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAADLCwAAAAAAAMsLAAAAAAAAAAAAAAAA8L8"
+				]
+			]
+		},
+		{
+			"file": "Makefile",
+			"settings":
+			{
+				"buffer_size": 533,
+				"encoding": "UTF-8",
+				"line_ending": "Unix"
+			}
+		},
+		{
+			"file": "stacosys/core/mailer.py",
+			"settings":
+			{
+				"buffer_size": 1087,
+				"encoding": "UTF-8",
+				"line_ending": "Unix"
+			},
+			"undo_stack":
+			[
+				[
+					11,
+					1,
+					"insert",
+					{
+						"characters": "\n"
+					},
+					"AgAAAEIEAAAAAAAAQwQAAAAAAAAAAAAAQwQAAAAAAABPBAAAAAAAAAAAAAA",
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAABPBAAAAAAAAE8EAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					13,
+					1,
+					"insert",
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+						"characters": "else:"
+					},
+					"BQAAAEsEAAAAAAAATAQAAAAAAAAAAAAATAQAAAAAAABNBAAAAAAAAAAAAABNBAAAAAAAAE4EAAAAAAAAAAAAAE4EAAAAAAAATwQAAAAAAAAAAAAATwQAAAAAAABQBAAAAAAAAAAAAAA",
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+				],
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+					{
+						"characters": "\n"
+					},
+					"AwAAAFAEAAAAAAAAUQQAAAAAAAAAAAAAUQQAAAAAAABZBAAAAAAAAAAAAABZBAAAAAAAAF0EAAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAABQBAAAAAAAAFAEAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					16,
+					1,
+					"insert",
+					{
+						"characters": "False"
+					},
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAABdBAAAAAAAAF0EAAAAAAAAAAAAAAAA8L8"
+				],
+				[
+					44,
+					1,
+					"insert",
+					{
+						"characters": "s"
+					},
+					"AQAAAB4CAAAAAAAAHwIAAAAAAAAAAAAA",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAAeAgAAAAAAAB4CAAAAAAAAAAAAAAAA8L8"
+				],
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+					1,
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+				],
+				[
+					56,
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+					"right_delete",
+					null,
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAAsBAAAAAAAAEMEAAAAAAAA////////738"
+				],
+				[
+					70,
+					1,
+					"left_delete",
+					null,
+					"AQAAAB4CAAAAAAAAHgIAAAAAAAABAAAAcw",
+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAAfAgAAAAAAAB8CAAAAAAAAAAAAAAAA8L8"
+				],
+				[
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+					null,
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+				[
+					82,
+					1,
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+					},
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAAzBAAAAAAAADMEAAAAAAAAAAAAAAAA8L8"
+				],
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+					1,
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+					"AgAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPC/AAAAAAEAAAA5BAAAAAAAADkEAAAAAAAAAAAAAAAA8L8"
+				]
+			]
+		},
+		{
+			"file": "stacosys/db/dao.py",
+			"settings":
+			{
+				"buffer_size": 1633,
+				"line_ending": "Unix"
+			},
+			"undo_stack":
+			[
+			]
+		},
+		{
+			"file": "stacosys.sublime-project",
+			"settings":
+			{
+				"buffer_size": 381,
+				"encoding": "UTF-8",
+				"line_ending": "Unix"
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+			"undo_stack":
+			[
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+					"AQAAAAAAAAABAAAAtgEAAAAAAADDAAAAAAAAAAAAAAAAAPC/"
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+					"AQAAAAAAAAABAAAAJgEAAAAAAAA/AQAAAAAAAP///////+9/"
+				]
+			]
+		},
+		{
+			"file": "stacosys/model/comment.py",
+			"settings":
+			{
+				"buffer_size": 471,
+				"line_ending": "Unix"
+			}
+		},
+		{
+			"file": "stacosys/conf/config.py",
+			"settings":
+			{
+				"buffer_size": 2481,
+				"encoding": "UTF-8",
+				"line_ending": "Unix"
+			}
+		}
+	],
+	"build_system": "",
+	"build_system_choices":
+	[
+	],
+	"build_varint": "",
+	"command_palette":
+	{
+		"height": 0.0,
+		"last_filter": "",
+		"selected_items":
+		[
+			[
+				"diag",
+				"LSP: Goto Diagnostic in Project"
+			],
+			[
+				"lsp",
+				"LSP: Toggle Diagnostics Panel"
+			],
+			[
+				"Package Control: ",
+				"Package Control: Install Package"
+			],
+			[
+				"distr",
+				"View: Toggle Distraction Free"
+			],
+			[
+				"upg",
+				"Package Control: Upgrade Package"
+			],
+			[
+				"comment",
+				"Toggle Comment"
+			],
+			[
+				"form",
+				"LSP: Format Document"
+			],
+			[
+				"format",
+				"LSP: Format Document"
+			],
+			[
+				"lspc",
+				"LSP: Clear Diagnostics"
+			],
+			[
+				"ren",
+				"LSP: Rename Symbol"
+			],
+			[
+				"instal",
+				"Package Control: Install Package"
+			],
+			[
+				"install",
+				"Package Control: Install Package"
+			],
+			[
+				"package re",
+				"Package Control: Remove Package"
+			],
+			[
+				"paka",
+				"Package Control: Remove Package"
+			],
+			[
+				"remove",
+				"Package Control: Remove Package"
+			],
+			[
+				"insta",
+				"Package Control: Install Package"
+			],
+			[
+				"inst",
+				"Package Control: Install Package"
+			],
+			[
+				"pac",
+				"Package Control: Remove Package"
+			]
+		],
+		"width": 0.0
+	},
+	"console":
+	{
+		"height": 164.0,
+		"history":
+		[
+		]
+	},
+	"distraction_free":
+	{
+		"menu_visible": true,
+		"show_minimap": false,
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+									"selector": "punctuation.accessor"
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+									"server": "LSP-pyright"
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+					"file": "stacosys/db/dao.py",
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+									"selector": "punctuation.accessor"
+								},
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+									"selector": "meta.tag, source - comment - string.quoted.double.block - string.quoted.single.block - string.unquoted.heredoc",
+									"server": "LSP-pyright"
+								}
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+							"lsp_uri": "file:///home/yannic/work/stacosys/stacosys/db/dao.py",
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+									"selector": "punctuation.accessor"
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+									"selector": "meta.tag, source - comment - string.quoted.double.block - string.quoted.single.block - string.unquoted.heredoc",
+									"server": "LSP-pyright"
+								}
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+							"lsp_uri": "file:///home/yannic/work/stacosys/stacosys/model/comment.py",
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+									"selector": "text.html, text.xml"
+								},
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+									"selector": "punctuation.accessor"
+								},
+								{
+									"characters": ".[",
+									"selector": "meta.tag, source - comment - string.quoted.double.block - string.quoted.single.block - string.unquoted.heredoc",
+									"server": "LSP-pyright"
+								}
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+							"lsp_hover_provider_count": 6,
+							"lsp_uri": "file:///home/yannic/work/stacosys/stacosys/conf/config.py",
+							"show_definitions": false,
+							"syntax": "Packages/Python/Python.sublime-syntax",
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+	{
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+	},
+	"input":
+	{
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+	},
+	"layout":
+	{
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+	"output.LSP Log Panel":
+	{
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+	},
+	"output.diagnostics":
+	{
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+	},
+	"output.find_results":
+	{
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+	},
+	"output.language servers":
+	{
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+	},
+	"output.mdpopups":
+	{
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+	},
+	"output.references":
+	{
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+	"project": "stacosys.sublime-project",
+	"replace":
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+	"select_file":
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+		"last_filter": "",
+		"selected_items":
+		[
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+		"last_filter": "",
+		"selected_items":
+		[
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+		"last_filter": "",
+		"selected_items":
+		[
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+	},
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+	"settings":
+	{
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+	"side_bar_visible": true,
+	"side_bar_width": 311.0,
+	"status_bar_visible": true,
+	"template_settings":
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+}
diff --git a/stacosys/__init__.py b/stacosys/__init__.py
index 587c2ab..e69de29 100644
--- a/stacosys/__init__.py
+++ b/stacosys/__init__.py
@@ -1 +0,0 @@
-__version__ = "3.3"
diff --git a/stacosys/conf/config.py b/stacosys/conf/config.py
index 5315036..78adea8 100644
--- a/stacosys/conf/config.py
+++ b/stacosys/conf/config.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-from enum import Enum
-
 import configparser
+from enum import Enum
 
 
 class ConfigParameter(Enum):
@@ -44,7 +43,7 @@ class Config:
         section, param = str(key.value).split(".")
         if not param:
             param = section
-            section = None
+            section = ""
         return (section, param)
 
     def exists(self, key: ConfigParameter):
diff --git a/stacosys/core/mailer.py b/stacosys/core/mailer.py
index b58f75b..43ec706 100644
--- a/stacosys/core/mailer.py
+++ b/stacosys/core/mailer.py
@@ -4,7 +4,6 @@
 import logging
 import smtplib
 import ssl
-
 from email.mime.text import MIMEText
 
 logger = logging.getLogger(__name__)
@@ -35,10 +34,10 @@ class Mailer:
         msg["From"] = sender
 
         context = ssl.create_default_context()
+        # TODO catch SMTP failure 
         with smtplib.SMTP_SSL(
             self._smtp_host, self._smtp_port, context=context
         ) as server:
             server.login(self._smtp_login, self._smtp_password)
             server.send_message(msg, sender, receivers)
-            return True
-        return False
+        return True
diff --git a/stacosys/core/rss.py b/stacosys/core/rss.py
index 958f155..42f9b8d 100644
--- a/stacosys/core/rss.py
+++ b/stacosys/core/rss.py
@@ -3,8 +3,8 @@
 
 from datetime import datetime
 
-import PyRSS2Gen
 import markdown
+import PyRSS2Gen
 
 from stacosys.model.comment import Comment
 
@@ -34,11 +34,20 @@ class Rss:
             .order_by(-Comment.published)
             .limit(10)
         ):
-            item_link = "%s://%s%s" % (self._rss_proto, self._site_url, row.url)
+            item_link = "%s://%s%s" % (
+                self._rss_proto,
+                self._site_url,
+                row.url,
+            )
             items.append(
                 PyRSS2Gen.RSSItem(
                     title="%s - %s://%s%s"
-                    % (self._rss_proto, row.author_name, self._site_url, row.url),
+                    % (
+                        self._rss_proto,
+                        row.author_name,
+                        self._site_url,
+                        row.url,
+                    ),
                     link=item_link,
                     description=md.convert(row.content),
                     guid=PyRSS2Gen.Guid("%s/%d" % (item_link, row.id)),
diff --git a/stacosys/db/dao.py b/stacosys/db/dao.py
index 597579d..fcd3689 100644
--- a/stacosys/db/dao.py
+++ b/stacosys/db/dao.py
@@ -7,8 +7,8 @@ from stacosys.model.comment import Comment
 TIME_FORMAT = "%Y-%m-%d %H:%M:%S"
 
 
-def find_comment_by_id(id):
-    return Comment.get_by_id(id)
+def find_comment_by_id(comment_id):
+    return Comment.get_by_id(comment_id)
 
 
 def notify_comment(comment: Comment):
diff --git a/stacosys/db/database.py b/stacosys/db/database.py
index 73c2591..08a7580 100644
--- a/stacosys/db/database.py
+++ b/stacosys/db/database.py
@@ -1,5 +1,6 @@
 #!/usr/bin/python
 # -*- coding: UTF-8 -*-
+# pylint: disable=import-outside-toplevel
 
 from peewee import Model
 from playhouse.db_url import SqliteDatabase
diff --git a/stacosys/interface/api.py b/stacosys/interface/api.py
index 042f0fc..8c88a2e 100644
--- a/stacosys/interface/api.py
+++ b/stacosys/interface/api.py
@@ -21,18 +21,18 @@ def query_comments():
     comments = []
     url = request.args.get("url", "")
 
-    logger.info("retrieve comments for url %s" % url)
+    logger.info("retrieve comments for url %s", url)
     for comment in dao.find_published_comments_by_url(url):
-        d = {
+        comment_dto = {
             "author": comment.author_name,
             "content": comment.content,
             "avatar": comment.author_gravatar,
             "date": comment.published.strftime("%Y-%m-%d %H:%M:%S"),
         }
         if comment.author_site:
-            d["site"] = comment.author_site
-        logger.debug(d)
-        comments.append(d)
+            comment_dto["site"] = comment.author_site
+        logger.debug(comment_dto)
+        comments.append(comment_dto)
     return jsonify({"data": comments})
 
 
diff --git a/stacosys/interface/form.py b/stacosys/interface/form.py
index 6955d44..04b52b3 100644
--- a/stacosys/interface/form.py
+++ b/stacosys/interface/form.py
@@ -14,12 +14,12 @@ logger = logging.getLogger(__name__)
 @app.route("/newcomment", methods=["POST"])
 def new_form_comment():
     data = request.form
-    logger.info("form data " + str(data))
+    logger.info("form data %s", str(data))
 
     # honeypot for spammers
     captcha = data.get("remarque", "")
     if captcha:
-        logger.warning("discard spam: data %s" % data)
+        logger.warning("discard spam: data %s", data)
         abort(400)
 
     url = data.get("url", "")
@@ -32,10 +32,10 @@ def new_form_comment():
 
     # anti-spam again
     if not url or not author_name or not message:
-        logger.warning("empty field: data %s" % data)
+        logger.warning("empty field: data %s", data)
         abort(400)
     if not check_form_data(data.to_dict()):
-        logger.warning("additional field: data %s" % data)
+        logger.warning("additional field: data %s", data)
         abort(400)
 
     # add a row to Comment table
@@ -49,23 +49,24 @@ def new_form_comment():
     return redirect(app.config.get("SITE_REDIRECT"), code=302)
 
 
-def check_form_data(d):
+def check_form_data(posted_comment):
     fields = ["url", "message", "site", "remarque", "author", "token", "email"]
-    filtered = dict(filter(lambda x: x[0] not in fields, d.items()))
+    filtered = dict(filter(lambda x: x[0] not in fields, posted_comment.items()))
     return not filtered
 
 
 @background.task
 def submit_new_comment(comment):
+    site_url = app.config.get("SITE_URL")
     comment_list = (
-        "Web admin interface: %s/web/admin" % app.config.get("SITE_URL"),
+        f"Web admin interface: {site_url}/web/admin",
         "",
-        "author: %s" % comment.author_name,
-        "site: %s" % comment.author_site,
-        "date: %s" % comment.created,
-        "url: %s" % comment.url,
+        f"author: {comment.author_name}",
+        f"site: {comment.author_site}",
+        f"date: {comment.created}",
+        f"url: {comment.url}",
         "",
-        "%s" % comment.content,
+        comment.content,
         "",
     )
     email_body = "\n".join(comment_list)
@@ -78,9 +79,10 @@ def submit_new_comment(comment):
         # save notification datetime
         dao.notify_comment(comment)
     else:
-        logger.warning("rescheduled. send mail failure " + subject)
+        logger.warning("rescheduled. send mail failure %s", subject)
 
 
 @background.callback
 def submit_new_comment_callback(future):
-    pass
+    # TODO use future to log submit status
+    logger.debug(future)
diff --git a/stacosys/interface/web/admin.py b/stacosys/interface/web/admin.py
index c65ee0a..26d172f 100644
--- a/stacosys/interface/web/admin.py
+++ b/stacosys/interface/web/admin.py
@@ -4,7 +4,7 @@
 import hashlib
 import logging
 
-from flask import request, redirect, flash, render_template, session
+from flask import flash, redirect, render_template, request, session
 
 from stacosys.db import dao
 from stacosys.interface import app
@@ -40,7 +40,7 @@ def login():
         flash("Identifiant ou mot de passe incorrect")
         return redirect("/web/login")
     # GET
-    return render_template("login_" + app.config.get("LANG") + ".html")
+    return render_template("login_" + app.config.get("LANG", "fr") + ".html")
 
 
 @app.route("/web/logout", methods=["GET"])
@@ -58,7 +58,7 @@ def admin_homepage():
 
     comments = dao.find_not_published_comments()
     return render_template(
-        "admin_" + app.config.get("LANG") + ".html",
+        "admin_" + app.config.get("LANG", "fr") + ".html",
         comments=comments,
         baseurl=app.config.get("SITE_URL"),
     )
diff --git a/stacosys/model/comment.py b/stacosys/model/comment.py
index 843e8b6..a6f3324 100644
--- a/stacosys/model/comment.py
+++ b/stacosys/model/comment.py
@@ -1,9 +1,7 @@
 #!/usr/bin/python
 # -*- coding: UTF-8 -*-
 
-from peewee import CharField
-from peewee import DateTimeField
-from peewee import TextField
+from peewee import CharField, DateTimeField, TextField
 
 from stacosys.db.database import BaseModel
 
diff --git a/run.py b/stacosys/run.py
similarity index 82%
rename from run.py
rename to stacosys/run.py
index 0f7c1a3..197215b 100644
--- a/run.py
+++ b/stacosys/run.py
@@ -10,9 +10,7 @@ from stacosys.conf.config import Config, ConfigParameter
 from stacosys.core.mailer import Mailer
 from stacosys.core.rss import Rss
 from stacosys.db import database
-from stacosys.interface import api
-from stacosys.interface import app
-from stacosys.interface import form
+from stacosys.interface import api, app, form
 from stacosys.interface.web import admin
 
 
@@ -20,11 +18,11 @@ from stacosys.interface.web import admin
 def configure_logging(level):
     root_logger = logging.getLogger()
     root_logger.setLevel(level)
-    ch = logging.StreamHandler()
-    ch.setLevel(level)
+    handler = logging.StreamHandler()
+    handler.setLevel(level)
     formatter = logging.Formatter("[%(asctime)s] %(name)s %(levelname)s %(message)s")
-    ch.setFormatter(formatter)
-    root_logger.addHandler(ch)
+    handler.setFormatter(formatter)
+    root_logger.addHandler(handler)
 
 
 def stacosys_server(config_pathname):
@@ -36,21 +34,21 @@ def stacosys_server(config_pathname):
 
     # check config file exists
     if not os.path.isfile(config_pathname):
-        logger.error(f"Configuration file '{config_pathname}' not found.")
+        logger.error("Configuration file '%s' not found.", config_pathname)
         sys.exit(1)
 
     # load config
     conf = Config.load(config_pathname)
     is_config_ok, erreur_config = conf.check()
     if not is_config_ok:
-        logger.error(f"Configuration incorrecte '{erreur_config}'")
+        logger.error("Configuration incorrecte '%s'", erreur_config)
         sys.exit(1)
     logger.info(conf)
 
     # check database file exists (prevents from creating a fresh db)
     db_pathname = conf.get(ConfigParameter.DB_SQLITE_FILE)
-    if not os.path.isfile(db_pathname):
-        logger.error(f"Database file '{db_pathname}' not found.")
+    if not db_pathname or not os.path.isfile(db_pathname):
+        logger.error("Database file '%s' not found.", db_pathname)
         sys.exit(1)
 
     # initialize database
@@ -86,12 +84,12 @@ def stacosys_server(config_pathname):
     app.config.update(WEB_PASSWORD=conf.get(ConfigParameter.WEB_PASSWORD))
     app.config.update(MAILER=mailer)
     app.config.update(RSS=rss)
-    logger.info(f"start interfaces {api} {form} {admin}")
+    logger.info("start interfaces %s %s %s", api, form, admin)
 
     # start Flask
     app.run(
         host=conf.get(ConfigParameter.HTTP_HOST),
-        port=conf.get(ConfigParameter.HTTP_PORT),
+        port=conf.get_int(ConfigParameter.HTTP_PORT),
         debug=False,
         use_reloader=False,
     )
diff --git a/tests/test_stacosys.py b/tests/test_stacosys.py
deleted file mode 100644
index 55e0869..0000000
--- a/tests/test_stacosys.py
+++ /dev/null
@@ -1,8 +0,0 @@
-import unittest
-
-from stacosys import __version__
-
-
-class StacosysTestCase(unittest.TestCase):
-    def test_version(self):
-        self.assertEqual("3.3", __version__)