Fix flake8 errors and warnings

We add the flake8 configuration used so we ensure everyone uses the same.
We remove the usage of __all__ for non public API.
When possible, we rationalize the class name according to its __name__ and module.

issue9082
review297061002

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+ignore=E123,E124,E126,E128,W503

__init__.py

@@ -25,15 +25,15 @@ def register():
         ir.Cron,
         ir.CronCompany,
         party.Configuration,
-        party.PartyConfigurationLang,
+        party.ConfigurationLang,
         party.Party,
         party.PartyLang,
         party.ContactMechanism,
         module='company', type_='model')
     Pool.register(
         company.CompanyConfig,
-        party.PartyReplace,
-        party.PartyErase,
+        party.Replace,
+        party.Erase,
         module='company', type_='wizard')
     Pool.register(
         party.LetterReport,

party.py

@@ -8,15 +8,12 @@ from trytond.transaction import Transaction
 from .company import CompanyReport
 from .model import CompanyMultiValueMixin, CompanyValueMixin
 
-__all__ = ['Configuration', 'PartyConfigurationLang', 'Party', 'PartyLang',
-    'PartyReplace', 'PartyErase', 'ContactMechanism']
-
 
 class Configuration(CompanyMultiValueMixin, metaclass=PoolMeta):
     __name__ = 'party.configuration'
 
 
-class PartyConfigurationLang(CompanyValueMixin, metaclass=PoolMeta):
+class ConfigurationLang(CompanyValueMixin, metaclass=PoolMeta):
     __name__ = 'party.configuration.party_lang'
 
     @classmethod
@@ -26,7 +23,7 @@ class PartyConfigurationLang(CompanyValueMixin, metaclass=PoolMeta):
             table = cls.__table_handler__(module_name)
             exist &= table.column_exist('company')
 
-        super(PartyConfigurationLang, cls).__register__(module_name)
+        super().__register__(module_name)
 
         if not exist:
             # Re-migrate with company
@@ -62,18 +59,18 @@ class PartyLang(CompanyValueMixin, metaclass=PoolMeta):
             field_names, value_names, fields)
 
 
-class PartyReplace(metaclass=PoolMeta):
+class Replace(metaclass=PoolMeta):
     __name__ = 'party.replace'
 
     @classmethod
     def fields_to_replace(cls):
-        return super(PartyReplace, cls).fields_to_replace() + [
+        return super().fields_to_replace() + [
             ('company.company', 'party'),
             ('company.employee', 'party'),
             ]
 
 
-class PartyErase(metaclass=PoolMeta):
+class Erase(metaclass=PoolMeta):
     __name__ = 'party.erase'
 
     def check_erase(self, party):
@@ -81,7 +78,7 @@ class PartyErase(metaclass=PoolMeta):
         Party = pool.get('party.party')
         Company = pool.get('company.company')
 
-        super(PartyErase, self).check_erase(party)
+        super().check_erase(party)
 
         with Transaction().set_user(0):
             companies = Company.search([])

res.py

@@ -160,7 +160,8 @@ class User(metaclass=PoolMeta):
             user_id = Transaction().context['user']
         result = super(User, cls).read(ids, fields_names=fields_names)
         if (fields_names
-                and (('company' in fields_names
+                and ((
+                        'company' in fields_names
                         and 'company' in Transaction().context)
                     or ('employee' in fields_names
                         and 'employee' in Transaction().context))):

setup.py

@@ -78,8 +78,8 @@ setup(name=name,
     keywords='tryton company employee',
     package_dir={'trytond.modules.company': '.'},
     packages=(
-        ['trytond.modules.company'] +
-        ['trytond.modules.company.%s' % p for p in find_packages()]
+        ['trytond.modules.company']
+        + ['trytond.modules.company.%s' % p for p in find_packages()]
         ),
     package_data={
         'trytond.modules.company': (info.get('xml', [])
@@ -94,7 +94,8 @@ setup(name=name,
         'Intended Audience :: Financial and Insurance Industry',
         'Intended Audience :: Legal Industry',
         'Intended Audience :: Manufacturing',
-        'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
+        'License :: OSI Approved :: '
+        'GNU General Public License v3 or later (GPLv3+)',
         'Natural Language :: Bulgarian',
         'Natural Language :: Catalan',
         'Natural Language :: Chinese (Simplified)',