diff --git a/tiramisu/__init__.py b/tiramisu/__init__.py
index 8d15d1e..536e5ee 100644
--- a/tiramisu/__init__.py
+++ b/tiramisu/__init__.py
@@ -12,8 +12,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""Configuration management library written in python
-"""
+"""Configuration management library written in python"""
 from .function import (
     calc_value,
     calc_value_property_help,
diff --git a/tiramisu/api.py b/tiramisu/api.py
index a8855a7..3113580 100644
--- a/tiramisu/api.py
+++ b/tiramisu/api.py
@@ -141,19 +141,22 @@ class CommonTiramisu(TiramisuHelp):
                     raise ConfigError(str(err))
             if id(self._subconfig.config_bag) != id(self._config_bag):
                 subconfig = self._subconfig
-                self._subconfig = subconfig.__class__(option=subconfig.option,
-                                                index=subconfig.index,
-                                                path=subconfig.path,
-                                                config_bag=self._config_bag,
-                                                parent=subconfig.parent,
-                                                identifiers=subconfig.identifiers,
-                                                identifier=None,
-                                                true_path=subconfig.true_path,
-                                                properties=subconfig.properties,
-                                                validate_properties=False,
-                                                check_dynamic_without_identifiers=False,
-                                                )
-                self._subconfig.is_self_dynamic_without_identifiers = subconfig.is_self_dynamic_without_identifiers
+                self._subconfig = subconfig.__class__(
+                    option=subconfig.option,
+                    index=subconfig.index,
+                    path=subconfig.path,
+                    config_bag=self._config_bag,
+                    parent=subconfig.parent,
+                    identifiers=subconfig.identifiers,
+                    identifier=None,
+                    true_path=subconfig.true_path,
+                    properties=subconfig.properties,
+                    validate_properties=False,
+                    check_dynamic_without_identifiers=False,
+                )
+                self._subconfig.is_self_dynamic_without_identifiers = (
+                    subconfig.is_self_dynamic_without_identifiers
+                )
             else:
                 self._subconfig._length = None
         if not self._subconfig:
@@ -189,7 +192,11 @@ def option_type(types):
                 return func(self, options_bag, *args[1:], **kwargs)
             self._set_subconfig()
             if (
-                "allow_dynoption" not in types and not ("dynoption_or_uncalculated" in types and kwargs.get("uncalculated", False) is True)
+                "allow_dynoption" not in types
+                and not (
+                    "dynoption_or_uncalculated" in types
+                    and kwargs.get("uncalculated", False) is True
+                )
             ) and self._subconfig.is_dynamic_without_identifiers:
                 raise AttributeOptionError(self._subconfig.path, "option-dynamic")
 
@@ -237,7 +244,13 @@ def option_type(types):
                             self.__class__.__name__, func.__name__
                         )
                         raise ConfigError(msg)
-                    if self._index is None and ("with_index" in types or ("with_index_or_uncalculated" in types and kwargs.get("uncalculated", False) is False)):
+                    if self._index is None and (
+                        "with_index" in types
+                        or (
+                            "with_index_or_uncalculated" in types
+                            and kwargs.get("uncalculated", False) is False
+                        )
+                    ):
                         msg = _(
                             "please specify index with a follower option ({0}.{1})"
                         ).format(self.__class__.__name__, func.__name__)
@@ -280,7 +293,7 @@ class CommonTiramisuOption(CommonTiramisu):
         path: str,
         index: Optional[int],
         config_bag: ConfigBag,
-        subconfig: Optional[SubConfig]=None,
+        subconfig: Optional[SubConfig] = None,
     ) -> None:
         self._path = path
         self._index = index
@@ -458,7 +471,11 @@ class _TiramisuOptionOptionDescription:
                 ):
                     if subconfig.properties is None:
                         subconfig.properties = undefined
-                    if is_default and subconfig.config_bag.context.get_owner(subconfig) != owners.default:
+                    if (
+                        is_default
+                        and subconfig.config_bag.context.get_owner(subconfig)
+                        != owners.default
+                    ):
                         continue
                     options.append(
                         TiramisuOption(
@@ -471,7 +488,11 @@ class _TiramisuOptionOptionDescription:
                 for subconfig in context.get_dynamic_from_dyn_option(
                     self._subconfig, option
                 ):
-                    if is_default and subconfig.config_bag.context.get_owner(subconfig) != owners.default:
+                    if (
+                        is_default
+                        and subconfig.config_bag.context.get_owner(subconfig)
+                        != owners.default
+                    ):
                         continue
                     options.append(
                         TiramisuOption(
@@ -495,17 +516,21 @@ class _TiramisuOptionOptionDescription:
                     current_indexes = [None]
                 for current_index in current_indexes:
                     t_option = TiramisuOption(
-                            option.impl_getpath(),
-                            current_index,
-                            self._config_bag,
-                            allow_dynoption=uncalculated,
-                        )
+                        option.impl_getpath(),
+                        current_index,
+                        self._config_bag,
+                        allow_dynoption=uncalculated,
+                    )
                     t_option._set_subconfig()
                     subconfig = t_option._subconfig
-                    if is_default and subconfig.config_bag.context.get_owner(subconfig) != owners.default:
+                    if (
+                        is_default
+                        and subconfig.config_bag.context.get_owner(subconfig)
+                        != owners.default
+                    ):
                         continue
                     options.append(
-                            t_option,
+                        t_option,
                     )
         return options
 
@@ -630,7 +655,10 @@ class _TiramisuOptionOptionDescription:
         dynconfig = None
         _subconfig = subconfig
         while not dynconfig:
-            if _subconfig.option.impl_is_optiondescription() and _subconfig.option.impl_is_dynoptiondescription():
+            if (
+                _subconfig.option.impl_is_optiondescription()
+                and _subconfig.option.impl_is_dynoptiondescription()
+            ):
                 dynconfig = _subconfig
             else:
                 _subconfig = _subconfig.parent
@@ -649,18 +677,30 @@ class _TiramisuOptionOptionDescription:
         """
         identifiers = []
         while True:
-            if subconfig.option.impl_is_optiondescription() and subconfig.option.impl_is_dynoptiondescription():
+            if (
+                subconfig.option.impl_is_optiondescription()
+                and subconfig.option.impl_is_dynoptiondescription()
+            ):
                 if not subconfig.is_self_dynamic_without_identifiers:
                     new_identifiers = [subconfig.identifiers[-1]]
                 else:
-                    new_identifiers = subconfig.option.get_identifiers(subconfig.parent, uncalculated=uncalculated, convert=convert)
+                    new_identifiers = subconfig.option.get_identifiers(
+                        subconfig.parent, uncalculated=uncalculated, convert=convert
+                    )
                 if isinstance(new_identifiers, Calculation):
                     if identifiers:
-                        identifiers = [[new_identifiers] + old_identifiers for old_identifiers in identifiers]
+                        identifiers = [
+                            [new_identifiers] + old_identifiers
+                            for old_identifiers in identifiers
+                        ]
                     else:
                         identifiers = [new_identifiers]
                 elif identifiers:
-                    identifiers = [[identifier] + old_identifiers for identifier in new_identifiers for old_identifiers in identifiers]
+                    identifiers = [
+                        [identifier] + old_identifiers
+                        for identifier in new_identifiers
+                        for old_identifiers in identifiers
+                    ]
                 else:
                     identifiers = [[identifier] for identifier in new_identifiers]
             subconfig = subconfig.parent
@@ -682,7 +722,10 @@ class _TiramisuOptionOptionDescription:
         dynconfig = None
         _subconfig = subconfig
         while not dynconfig:
-            if _subconfig.option.impl_is_optiondescription() and _subconfig.option.impl_is_dynoptiondescription():
+            if (
+                _subconfig.option.impl_is_optiondescription()
+                and _subconfig.option.impl_is_dynoptiondescription()
+            ):
                 dynconfig = _subconfig
             _subconfig = _subconfig.parent
         return dynconfig.option.get_identifiers(
@@ -809,10 +852,7 @@ class TiramisuOptionOwner(CommonTiramisuOption):
         """Is option has defaut value"""
         subconfig = self._subconfig
         s_properties = subconfig.properties
-        if (
-            "frozen" in s_properties
-            and "force_default_on_freeze" in s_properties
-        ):
+        if "frozen" in s_properties and "force_default_on_freeze" in s_properties:
             return True
         context = self._config_bag.context
         subconfig = context._get(
@@ -844,7 +884,13 @@ class TiramisuOptionProperty(CommonTiramisuOption):
     _validate_properties = False
 
     @option_type(
-        ["option", "optiondescription", "with_index_or_uncalculated", "symlink", "allow_dynoption"]
+        [
+            "option",
+            "optiondescription",
+            "with_index_or_uncalculated",
+            "symlink",
+            "allow_dynoption",
+        ]
     )
     def get(
         self,
@@ -1065,7 +1111,15 @@ class TiramisuOptionValue(CommonTiramisuOption, _TiramisuODGet):
 
     _validate_properties = True
 
-    @option_type(["option", "symlink", "with_index", "optiondescription", "dynoption_or_uncalculated"])
+    @option_type(
+        [
+            "option",
+            "symlink",
+            "with_index",
+            "optiondescription",
+            "dynoption_or_uncalculated",
+        ]
+    )
     def get(
         self,
         *,
@@ -1129,7 +1183,13 @@ class TiramisuOptionValue(CommonTiramisuOption, _TiramisuODGet):
                 values.reset(self._subconfig)
 
     @option_type(
-        ["option", "with_or_without_index", "symlink", "dont_validate_property", "dynoption_or_uncalculated"]
+        [
+            "option",
+            "with_or_without_index",
+            "symlink",
+            "dont_validate_property",
+            "dynoption_or_uncalculated",
+        ]
     )
     def default(
         self,
@@ -1338,7 +1398,7 @@ class TiramisuOption(
         if subfunc in ["forcepermissive", "unrestraint", "nowarnings"]:
             if subfunc == "unrestraint" and self._config_bag.is_unrestraint:
                 return self
-            #if self._orig_config_bags:
+            # if self._orig_config_bags:
             #    msg = _(
             #        "do not use unrestraint, nowarnings or forcepermissive together"
             #    )
@@ -1428,6 +1488,8 @@ class TiramisuOption(
         if self._tiramisu_dict is None:  # pragma: no cover
             self._load_dict()
         return self._tiramisu_dict.set_updates(body)
+
+
 #
 #    def forcepermissive(self):
 #        self._set_subconfig()
@@ -1502,20 +1564,25 @@ class TiramisuContextValue(TiramisuConfig, _TiramisuODGet):
             only_mandatory=True,
         ):
             if id(subconfig.config_bag) != id(config_bag):
-                old_is_dynamic_without_identifiers = subconfig.is_self_dynamic_without_identifiers
-                subconfig = subconfig.__class__(option=subconfig.option,
-                                                index=subconfig.index,
-                                                path=subconfig.path,
-                                                config_bag=config_bag,
-                                                parent=subconfig.parent,
-                                                identifiers=subconfig.identifiers,
-                                                identifier=None,
-                                                true_path=subconfig.true_path,
-                                                properties=subconfig.properties,
-                                                validate_properties=False,
-                                                check_dynamic_without_identifiers=False,
-                                                )
-                subconfig.is_self_dynamic_without_identifiers = old_is_dynamic_without_identifiers
+                old_is_dynamic_without_identifiers = (
+                    subconfig.is_self_dynamic_without_identifiers
+                )
+                subconfig = subconfig.__class__(
+                    option=subconfig.option,
+                    index=subconfig.index,
+                    path=subconfig.path,
+                    config_bag=config_bag,
+                    parent=subconfig.parent,
+                    identifiers=subconfig.identifiers,
+                    identifier=None,
+                    true_path=subconfig.true_path,
+                    properties=subconfig.properties,
+                    validate_properties=False,
+                    check_dynamic_without_identifiers=False,
+                )
+                subconfig.is_self_dynamic_without_identifiers = (
+                    old_is_dynamic_without_identifiers
+                )
             else:
                 subconfig._length = None
             options.append(
@@ -2229,6 +2296,7 @@ class TiramisuAPI(TiramisuHelp):
 class ConfigProp(TiramisuAPI, TiramisuContextOption):
     pass
 
+
 class Config(TiramisuAPI, TiramisuContextOption):
     """Root config object that enables us to handle the configuration options"""
 
@@ -2255,6 +2323,8 @@ class Config(TiramisuAPI, TiramisuContextOption):
             permissives=permissives,
         )
         super().__init__(config_bag)
+
+
 #
 #    def __del__(self):
 #        try:
diff --git a/tiramisu/autolib.py b/tiramisu/autolib.py
index 96074d8..6830f92 100644
--- a/tiramisu/autolib.py
+++ b/tiramisu/autolib.py
@@ -157,9 +157,9 @@ class ParamDynOption(ParamOption):
         )
         if not isinstance(identifiers, (list, Calculation)):
             raise Exception(
-                _("identifiers in ParamDynOption must be a list or a calculation, not {0}").format(
-                    identifiers
-                )
+                _(
+                    "identifiers in ParamDynOption must be a list or a calculation, not {0}"
+                ).format(identifiers)
             )
         if not isinstance(optional, bool):
             raise Exception(
@@ -628,21 +628,26 @@ def manager_callback(
             properties = config_bag.context.get_settings().getproperties(
                 subconfig,
                 uncalculated=True,
-            ) - {'validator', 'mandatory', 'empty'}
+            ) - {"validator", "mandatory", "empty"}
             for subconfig_ in subconfigs:
                 if subconfig.path == subconfig_.path:
                     values.append(orig_value)
                 else:
                     subconfig_.properties = properties
-                    values.append(get_value(
-                        config_bag,
-                        subconfig_,
-                        param,
-                        True,
-                    ))
+                    values.append(
+                        get_value(
+                            config_bag,
+                            subconfig_,
+                            param,
+                            True,
+                        )
+                    )
             if callback.__name__ not in FUNCTION_WAITING_FOR_DICT:
                 return values
-            return {"name": search_option.impl_get_display_name(subconfig), "value": values}
+            return {
+                "name": search_option.impl_get_display_name(subconfig),
+                "value": values,
+            }
         else:
             value = calc_self(
                 param,
@@ -779,7 +784,9 @@ def manager_callback(
                                     or param.raisepropertyerror
                                 ):
                                     raise err from err
-                                raise ConfigError(str(err), subconfig=subconfig) from err
+                                raise ConfigError(
+                                    str(err), subconfig=subconfig
+                                ) from err
                     parents = new_parents
                 if subconfigs_is_a_list:
                     subconfigs = parents
@@ -882,18 +889,19 @@ def carry_out_calculation(
     config_bag = config_bag.copy()
     config_bag.set_permissive()
     old_is_dynamic_without_identifiers = subconfig.is_dynamic_without_identifiers
-    subconfig = subconfig.__class__(option=subconfig.option,
-                                    index=subconfig.index,
-                                    path=subconfig.path,
-                                    config_bag=config_bag,
-                                    parent=subconfig.parent,
-                                    identifiers=subconfig.identifiers,
-                                    identifier=None,
-                                    true_path=subconfig.true_path,
-                                    properties=subconfig.properties,
-                                    validate_properties=False,
-                                    check_dynamic_without_identifiers=False,
-                                    )
+    subconfig = subconfig.__class__(
+        option=subconfig.option,
+        index=subconfig.index,
+        path=subconfig.path,
+        config_bag=config_bag,
+        parent=subconfig.parent,
+        identifiers=subconfig.identifiers,
+        identifier=None,
+        true_path=subconfig.true_path,
+        properties=subconfig.properties,
+        validate_properties=False,
+        check_dynamic_without_identifiers=False,
+    )
     subconfig.is_dynamic_without_identifiers = old_is_dynamic_without_identifiers
     if callback_params:
         for key, param in chain(
diff --git a/tiramisu/config.py b/tiramisu/config.py
index 7554f85..3fef8d1 100644
--- a/tiramisu/config.py
+++ b/tiramisu/config.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""options handler global entry point
-"""
+"""options handler global entry point"""
 import weakref
 from copy import copy, deepcopy
 from typing import Optional, List, Any, Union
@@ -49,7 +48,7 @@ def get_common_path(path1, path2):
     if common_path in all_paths:
         # od.st is not the common_path of od.st_in
         all_paths.remove(common_path)
-        if all_paths[0].startswith(common_path + '.'):
+        if all_paths[0].startswith(common_path + "."):
             return common_path
     if common_path.endswith("."):
         return common_path[:-1]
@@ -103,9 +102,11 @@ class CCache:
         resetted_opts.append(subconfig.path)
         config_bag = subconfig.config_bag
         if not force:
-    #        if is_default and config_bag.context.get_owner(subconfig) != owners.default:
-    #            return
-            for is_default, woption in subconfig.option.get_dependencies(subconfig.option):
+            #        if is_default and config_bag.context.get_owner(subconfig) != owners.default:
+            #            return
+            for is_default, woption in subconfig.option.get_dependencies(
+                subconfig.option
+            ):
                 option = woption()
                 if option.issubdyn():
                     # it's an option in dynoptiondescription, remove cache for all generated option
@@ -343,7 +344,13 @@ class SubConfig:
                 self.config_bag.context.get_settings().validate_properties(self)
                 self._properties = undefined
             self.config_bag.context.get_settings().validate_properties(self)
-        if validate_properties and self.apply_requires and self.option.impl_is_optiondescription() and self.path and self.properties is not None:
+        if (
+            validate_properties
+            and self.apply_requires
+            and self.option.impl_is_optiondescription()
+            and self.path
+            and self.properties is not None
+        ):
             settings = config_bag.context.get_settings()
             self.transitive_properties = settings.calc_transitive_properties(
                 self,
@@ -526,7 +533,10 @@ class SubConfig:
         )
         if check_index and index is not None:
             if option.impl_is_optiondescription() or not option.impl_is_follower():
-                raise ConfigError("index must be set only with a follower option", subconfig=subsubconfig,)
+                raise ConfigError(
+                    "index must be set only with a follower option",
+                    subconfig=subsubconfig,
+                )
             length = self.get_length_leadership()
             if index >= length:
                 raise LeadershipError(
@@ -567,9 +577,11 @@ class SubConfig:
                 None,
                 validate_properties=False,
             )
-            subconfig.is_self_dynamic_without_identifiers = self.is_self_dynamic_without_identifiers
-            #FIXME
-            #self._length = len(cconfig_bag.context.get_value(subconfig))
+            subconfig.is_self_dynamic_without_identifiers = (
+                self.is_self_dynamic_without_identifiers
+            )
+            # FIXME
+            # self._length = len(cconfig_bag.context.get_value(subconfig))
             length = len(cconfig_bag.context.get_value(subconfig))
         return length
 
@@ -681,7 +693,9 @@ class SubConfig:
             true_path=self.true_path,
             validate_properties=False,
         )
-        subconfig.is_self_dynamic_without_identifiers = self.is_self_dynamic_without_identifiers
+        subconfig.is_self_dynamic_without_identifiers = (
+            self.is_self_dynamic_without_identifiers
+        )
         return subconfig
 
 
@@ -1073,6 +1087,7 @@ class _Config(CCache):
 
 class _CommonConfig(_Config):
     "abstract base class for the Config, KernelGroupConfig and the KernelMetaConfig"
+
     __slots__ = (
         "_impl_values",
         "_impl_values_cache",
@@ -1905,9 +1920,7 @@ class KernelMetaConfig(KernelMixConfig):
             if descr is None:
                 descr = child.get_description()
             if child.impl_getname() is None:
-                raise ConfigError(
-                    _("children in MetaConfig must have name")
-                )
+                raise ConfigError(_("children in MetaConfig must have name"))
             elif descr is not child.get_description():
                 raise ValueError(
                     _(
diff --git a/tiramisu/error.py b/tiramisu/error.py
index 55b50d2..8dc116e 100644
--- a/tiramisu/error.py
+++ b/tiramisu/error.py
@@ -39,9 +39,9 @@ TiramisuErrorCode = Literal[
 def display_list(
     lst,
     *,
-    separator: str="and",
-    add_quote: bool=False,
-    sort: bool=True,
+    separator: str = "and",
+    add_quote: bool = False,
+    sort: bool = True,
 ) -> str():
     if not lst:
         return '""'
@@ -212,7 +212,7 @@ class ConfigError(Exception):
         exp,
         *,
         prefix: Optional[str] = None,
-        subconfig: Optional["Subconfig"]=None,
+        subconfig: Optional["Subconfig"] = None,
     ):
         super().__init__(exp)
         self.err_msg = exp
@@ -230,6 +230,7 @@ class ConfigError(Exception):
 
 class ConflictError(Exception):
     "duplicate options are present in a single config"
+
     pass
 
 
@@ -308,6 +309,7 @@ class LeadershipError(Exception):
 
 class ConstError(TypeError):
     "no uniq value in _NameSpace"
+
     pass
 
 
@@ -426,7 +428,8 @@ class Errors:
         display_name = option.impl_get_display_name(subconfig, with_quote=True)
         if original_error:
             raise ConfigError(
-                message.format(display_name, original_error, *extra_keys), subconfig=subconfig,
+                message.format(display_name, original_error, *extra_keys),
+                subconfig=subconfig,
             ) from original_error
         raise ConfigError(message.format(display_name, extra_keys), subconfig=subconfig)
 
diff --git a/tiramisu/function.py b/tiramisu/function.py
index 8cbe94f..2d7f6df 100644
--- a/tiramisu/function.py
+++ b/tiramisu/function.py
@@ -12,8 +12,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""some functions to validates or calculates value
-"""
+"""some functions to validates or calculates value"""
 from typing import Any, List, Optional
 from operator import add, mul, sub, truediv
 from ipaddress import ip_address, ip_interface, ip_network
diff --git a/tiramisu/option/__init__.py b/tiramisu/option/__init__.py
index 570d7dd..7c37117 100644
--- a/tiramisu/option/__init__.py
+++ b/tiramisu/option/__init__.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""all official option
-"""
+"""all official option"""
 from .optiondescription import OptionDescription
 from .dynoptiondescription import DynOptionDescription
 from .leadership import Leadership
diff --git a/tiramisu/option/baseoption.py b/tiramisu/option/baseoption.py
index c3e7bd4..69786ce 100644
--- a/tiramisu/option/baseoption.py
+++ b/tiramisu/option/baseoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""base option
-"""
+"""base option"""
 from typing import FrozenSet, Set, Any, List, Optional, Dict
 import weakref
 from itertools import chain
@@ -27,7 +26,13 @@ from itertools import chain
 
 from ..i18n import _
 from ..setting import undefined
-from ..autolib import Calculation, ParamOption, ParamSelfOption, ParamInformation, ParamSelfInformation
+from ..autolib import (
+    Calculation,
+    ParamOption,
+    ParamSelfOption,
+    ParamInformation,
+    ParamSelfInformation,
+)
 
 STATIC_TUPLE = frozenset()
 
@@ -390,10 +395,7 @@ class BaseOption(Base):
             self.value_dependency(value, is_identifier)
 
     def value_dependency(
-        self,
-        value: Any,
-        is_identifier: bool = False,
-        type_: str = 'default'
+        self, value: Any, is_identifier: bool = False, type_: str = "default"
     ) -> Any:
         if not isinstance(is_identifier, bool):
             raise Exception()
diff --git a/tiramisu/option/booloption.py b/tiramisu/option/booloption.py
index 5428d84..75e421f 100644
--- a/tiramisu/option/booloption.py
+++ b/tiramisu/option/booloption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""BoolOption
-"""
+"""BoolOption"""
 
 from ..i18n import _
 from .option import Option
diff --git a/tiramisu/option/broadcastoption.py b/tiramisu/option/broadcastoption.py
index 8f8b8c0..1870d9a 100644
--- a/tiramisu/option/broadcastoption.py
+++ b/tiramisu/option/broadcastoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""BroadcastOption
-"""
+"""BroadcastOption"""
 from ipaddress import ip_address
 
 from ..i18n import _
diff --git a/tiramisu/option/choiceoption.py b/tiramisu/option/choiceoption.py
index 041e5de..e7bc634 100644
--- a/tiramisu/option/choiceoption.py
+++ b/tiramisu/option/choiceoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""ChoiceOption
-"""
+"""ChoiceOption"""
 from typing import Any
 from itertools import chain
 
diff --git a/tiramisu/option/dateoption.py b/tiramisu/option/dateoption.py
index a80b897..2db1efe 100644
--- a/tiramisu/option/dateoption.py
+++ b/tiramisu/option/dateoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""DateOption
-"""
+"""DateOption"""
 from datetime import datetime
 
 from ..i18n import _
diff --git a/tiramisu/option/domainnameoption.py b/tiramisu/option/domainnameoption.py
index d20de7e..d87a495 100644
--- a/tiramisu/option/domainnameoption.py
+++ b/tiramisu/option/domainnameoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""DomainnameOption
-"""
+"""DomainnameOption"""
 import re
 import socket
 from ipaddress import ip_interface
diff --git a/tiramisu/option/dynoptiondescription.py b/tiramisu/option/dynoptiondescription.py
index 387a20f..89396b7 100644
--- a/tiramisu/option/dynoptiondescription.py
+++ b/tiramisu/option/dynoptiondescription.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""DynOptionDescription
-"""
+"""DynOptionDescription"""
 import re
 import weakref
 from typing import List, Any, Optional, Dict
diff --git a/tiramisu/option/emailoption.py b/tiramisu/option/emailoption.py
index 9dc475a..e923f16 100644
--- a/tiramisu/option/emailoption.py
+++ b/tiramisu/option/emailoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""EmailOption
-"""
+"""EmailOption"""
 import re
 
 from ..i18n import _
diff --git a/tiramisu/option/filenameoption.py b/tiramisu/option/filenameoption.py
index 536c652..bb7e280 100644
--- a/tiramisu/option/filenameoption.py
+++ b/tiramisu/option/filenameoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""FilenameOption
-"""
+"""FilenameOption"""
 from pathlib import Path
 
 from ..i18n import _
diff --git a/tiramisu/option/floatoption.py b/tiramisu/option/floatoption.py
index eace175..7e6b8a0 100644
--- a/tiramisu/option/floatoption.py
+++ b/tiramisu/option/floatoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""FloatOption
-"""
+"""FloatOption"""
 
 from ..i18n import _
 from .option import Option
diff --git a/tiramisu/option/intoption.py b/tiramisu/option/intoption.py
index 98e90c6..e6f7541 100644
--- a/tiramisu/option/intoption.py
+++ b/tiramisu/option/intoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""IntOption
-"""
+"""IntOption"""
 
 from ..i18n import _
 from .option import Option
@@ -27,6 +26,7 @@ from .option import Option
 
 class IntOption(Option):
     "represents a choice of an integer"
+
     __slots__ = tuple()
     _type = "integer"
     _t_type = _("integer")
diff --git a/tiramisu/option/ipoption.py b/tiramisu/option/ipoption.py
index 62705df..b612f98 100644
--- a/tiramisu/option/ipoption.py
+++ b/tiramisu/option/ipoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""IPOption
-"""
+"""IPOption"""
 from ipaddress import ip_address, ip_interface
 
 from ..i18n import _
diff --git a/tiramisu/option/leadership.py b/tiramisu/option/leadership.py
index 732a46d..7970341 100644
--- a/tiramisu/option/leadership.py
+++ b/tiramisu/option/leadership.py
@@ -74,7 +74,9 @@ class Leadership(OptionDescription):
                     self._check_default_value(child)
                 # remove empty property for follower
                 if not child.impl_is_submulti():
-                    child._properties = frozenset(child._properties - {"empty", "unique"})
+                    child._properties = frozenset(
+                        child._properties - {"empty", "unique"}
+                    )
                 followers.append(child)
             child._add_dependency(self, "leadership")
             child._leadership = weakref.ref(self)
diff --git a/tiramisu/option/macoption.py b/tiramisu/option/macoption.py
index af3f47d..ef41582 100644
--- a/tiramisu/option/macoption.py
+++ b/tiramisu/option/macoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""MACOption
-"""
+"""MACOption"""
 import re
 
 from ..i18n import _
diff --git a/tiramisu/option/netmaskoption.py b/tiramisu/option/netmaskoption.py
index 3e6bed7..aed7180 100644
--- a/tiramisu/option/netmaskoption.py
+++ b/tiramisu/option/netmaskoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""NetmaskOption
-"""
+"""NetmaskOption"""
 from ipaddress import ip_network
 from ..i18n import _
 from .stroption import StrOption
diff --git a/tiramisu/option/networkoption.py b/tiramisu/option/networkoption.py
index e5f6f9f..f8974a1 100644
--- a/tiramisu/option/networkoption.py
+++ b/tiramisu/option/networkoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""NetworkOption
-"""
+"""NetworkOption"""
 from ipaddress import ip_network
 
 from ..i18n import _
@@ -29,6 +28,7 @@ from .stroption import StrOption
 
 class NetworkOption(IPOption):
     "represents the choice of a network"
+
     __slots__ = tuple()
     _type = "network address"
     _t_type = _("network address")
diff --git a/tiramisu/option/optiondescription.py b/tiramisu/option/optiondescription.py
index 09dacc3..d995706 100644
--- a/tiramisu/option/optiondescription.py
+++ b/tiramisu/option/optiondescription.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""OptionDescription
-"""
+"""OptionDescription"""
 import weakref
 from typing import Optional, Iterator, Union, List, Dict
 
@@ -29,7 +28,12 @@ from ..setting import ConfigBag, groups, undefined, owners, Undefined
 from .baseoption import BaseOption
 
 # from .syndynoption import SubDynOptionDescription, SynDynOptionDescription
-from ..error import ConfigError, ConflictError, AttributeOptionError, PropertiesOptionError
+from ..error import (
+    ConfigError,
+    ConflictError,
+    AttributeOptionError,
+    PropertiesOptionError,
+)
 
 
 class CacheOptionDescription(BaseOption):
diff --git a/tiramisu/option/passwordoption.py b/tiramisu/option/passwordoption.py
index 2ae5804..5650db1 100644
--- a/tiramisu/option/passwordoption.py
+++ b/tiramisu/option/passwordoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""PasswordOption
-"""
+"""PasswordOption"""
 
 from ..i18n import _
 from ..error import display_list
diff --git a/tiramisu/option/permissionsoption.py b/tiramisu/option/permissionsoption.py
index 4d95356..1303a16 100644
--- a/tiramisu/option/permissionsoption.py
+++ b/tiramisu/option/permissionsoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""PermissionsOption
-"""
+"""PermissionsOption"""
 import re
 
 from ..i18n import _
diff --git a/tiramisu/option/portoption.py b/tiramisu/option/portoption.py
index 80ba461..5b2c2dc 100644
--- a/tiramisu/option/portoption.py
+++ b/tiramisu/option/portoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""PortOption
-"""
+"""PortOption"""
 from ..i18n import _
 from .stroption import StrOption
 
diff --git a/tiramisu/option/stroption.py b/tiramisu/option/stroption.py
index 3e08658..26564a4 100644
--- a/tiramisu/option/stroption.py
+++ b/tiramisu/option/stroption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""StrOption and RegexpOption
-"""
+"""StrOption and RegexpOption"""
 from typing import Any
 
 from ..i18n import _
diff --git a/tiramisu/option/symlinkoption.py b/tiramisu/option/symlinkoption.py
index 3233db5..89cb7c8 100644
--- a/tiramisu/option/symlinkoption.py
+++ b/tiramisu/option/symlinkoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""SymLinkOption link to an other option
-"""
+"""SymLinkOption link to an other option"""
 from typing import Any, Optional, Dict
 from .baseoption import BaseOption, valid_name
 from ..i18n import _
diff --git a/tiramisu/option/urloption.py b/tiramisu/option/urloption.py
index d54509a..139e8bb 100644
--- a/tiramisu/option/urloption.py
+++ b/tiramisu/option/urloption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""URLOption to check url value
-"""
+"""URLOption to check url value"""
 import re
 from typing import Any, Optional, List, Dict
 
diff --git a/tiramisu/option/usernameoption.py b/tiramisu/option/usernameoption.py
index 79c1586..ecc0219 100644
--- a/tiramisu/option/usernameoption.py
+++ b/tiramisu/option/usernameoption.py
@@ -18,8 +18,7 @@
 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
-"""UsernameOption or GroupnameOption to check unix username/group value
-"""
+"""UsernameOption or GroupnameOption to check unix username/group value"""
 import re
 
 from ..i18n import _
diff --git a/tiramisu/setting.py b/tiramisu/setting.py
index 82d3ce9..b6cde28 100644
--- a/tiramisu/setting.py
+++ b/tiramisu/setting.py
@@ -144,8 +144,7 @@ RW_REMOVE = frozenset(
 
 
 PROPERTIES_MAKE_SENSE = (
-    "cache"
-    "demoting_error_warning",
+    "cache" "demoting_error_warning",
     "disabled",
     "empty",
     "everything_frozen",
@@ -378,6 +377,7 @@ forbidden_owners = (owners.default, owners.forced)  # pylint: disable=no-member
 # ____________________________________________________________
 class Settings:
     "``config.Config()``'s configuration options settings"
+
     __slots__ = (
         "_properties",
         "_permissives",
diff --git a/tiramisu/value.py b/tiramisu/value.py
index ebd7249..d878ebf 100644
--- a/tiramisu/value.py
+++ b/tiramisu/value.py
@@ -122,8 +122,8 @@ class Values:
             # get it
             value = self.get_default_value(subconfig)
         if owner == owners.default:
-            if(
-                    "force_store_value" in subconfig.config_bag.properties
+            if (
+                "force_store_value" in subconfig.config_bag.properties
                 and "force_store_value" in self_properties
             ):
                 value = self.get_default_value(subconfig)
@@ -163,9 +163,7 @@ class Values:
         msubconfig = self._get_modified_parent(subconfig)
         if msubconfig is not None:
             # retrieved value from parent config
-            return msubconfig.config_bag.context.get_values().getowner(
-                msubconfig
-            )
+            return msubconfig.config_bag.context.get_values().getowner(msubconfig)
         return owners.default
 
     def get_default_value(
@@ -342,7 +340,7 @@ class Values:
                         subconfig,
                         value,
                     )
-#                parent._length = len(value)
+                #                parent._length = len(value)
                 leader.follower_force_store_value(
                     value,
                     parent,
@@ -569,14 +567,11 @@ class Values:
         :returns: a `setting.owners.Owner` object
         """
         self_properties = subconfig.properties
-        if (
-            "frozen" in self_properties
-            and "force_default_on_freeze" in self_properties
-        ):
+        if "frozen" in self_properties and "force_default_on_freeze" in self_properties:
             return owners.default
         setting_properties = subconfig.config_bag.properties
         if (
-                "force_store_value" in setting_properties
+            "force_store_value" in setting_properties
             and "force_store_value" in self_properties
         ):
             self.set_force_store_value(subconfig)