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

account.py

@@ -2,8 +2,6 @@
 # this repository contains the full copyright notices and license terms.
 from trytond.pool import PoolMeta, Pool
 
-__all__ = ['InvoiceLine']
-
 
 class InvoiceLine(metaclass=PoolMeta):
     __name__ = 'account.invoice.line'

setup.py

@@ -80,8 +80,8 @@ setup(name=name,
     keywords='tryton stock consignment',
     package_dir={'trytond.modules.stock_consignment': '.'},
     packages=(
-        ['trytond.modules.stock_consignment'] +
-        ['trytond.modules.stock_consignment.%s' % p for p in find_packages()]
+        ['trytond.modules.stock_consignment']
+        + ['trytond.modules.stock_consignment.%s' % p for p in find_packages()]
         ),
     package_data={
         'trytond.modules.stock_consignment': (info.get('xml', [])
@@ -96,7 +96,8 @@ 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)',

stock.py

@@ -8,9 +8,6 @@ from trytond.transaction import Transaction
 from trytond.pool import PoolMeta, Pool
 from trytond.pyson import Eval
 
-__all__ = ['Location', 'LocationLeadTime',
-    'Move', 'ShipmentInternal', 'Inventory', 'OrderPoint']
-
 
 class Location(metaclass=PoolMeta):
     __name__ = 'stock.location'
@@ -103,7 +100,8 @@ class Move(metaclass=PoolMeta):
                 and not self.origin
                 and self.from_location
                 and self.to_location
-                and ((self.from_location.type == 'supplier'
+                and ((
+                        self.from_location.type == 'supplier'
                         and self.to_location.type in {
                             'storage', 'production', 'customer'})
                     or (self.from_location.type in {

tests/__init__.py

@@ -2,7 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 
 try:
-    from trytond.modules.stock_consignment.tests.test_stock_consignment import suite
+    from trytond.modules.stock_consignment.tests.test_stock_consignment import suite  # noqa: E501
 except ImportError:
     from .test_stock_consignment import suite