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

@@ -2,18 +2,18 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from .routing import *
-from .production import *
-from .product import *
+from . import routing
+from . import production
+from . import product
 
 
 def register():
     Pool.register(
-        Routing,
-        Operation,
-        RoutingStep,
-        Routing_BOM,
-        Production,
-        ProductBom,
-        ProductionLeadTime,
+        routing.Routing,
+        routing.RoutingOperation,
+        routing.RoutingStep,
+        routing.Routing_BOM,
+        production.Production,
+        product.ProductBom,
+        product.ProductionLeadTime,
         module='production_routing', type_='model')

product.py

@@ -4,8 +4,6 @@ from trytond.pool import PoolMeta
 from trytond.model import fields
 from trytond.pyson import Eval
 
-__all__ = ['ProductBom', 'ProductionLeadTime']
-
 
 class ProductBom(metaclass=PoolMeta):
     __name__ = 'product.product-production.bom'

production.py

@@ -4,8 +4,6 @@ from trytond.pool import PoolMeta
 from trytond.model import fields
 from trytond.pyson import Eval
 
-__all__ = ['Production']
-
 
 class Production(metaclass=PoolMeta):
     __name__ = 'production'

routing.py

@@ -3,8 +3,6 @@
 from trytond.model import (
     ModelSQL, ModelView, DeactivableMixin, fields, sequence_ordered)
 
-__all__ = ['Routing', 'Operation', 'RoutingStep', 'Routing_BOM']
-
 
 class Routing(DeactivableMixin, ModelSQL, ModelView):
     'Routing'
@@ -15,7 +13,7 @@ class Routing(DeactivableMixin, ModelSQL, ModelView):
         'production.routing-production.bom', 'routing', 'bom', 'BOMs')
 
 
-class Operation(DeactivableMixin, ModelSQL, ModelView):
+class RoutingOperation(DeactivableMixin, ModelSQL, ModelView):
     'Operation'
     __name__ = 'production.routing.operation'
     name = fields.Char('Operation', required=True, translate=True)

setup.py

@@ -79,8 +79,9 @@ setup(name=name,
     keywords='tryton production routing',
     package_dir={'trytond.modules.production_routing': '.'},
     packages=(
-        ['trytond.modules.production_routing'] +
-        ['trytond.modules.production_routing.%s' % p for p in find_packages()]
+        ['trytond.modules.production_routing']
+        + ['trytond.modules.production_routing.%s' % p
+            for p in find_packages()]
         ),
     package_data={
         'trytond.modules.production_routing': (info.get('xml', [])
@@ -94,7 +95,8 @@ 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)',