steammessages.proto on both modules will try to add key_field and other extensions, but since they are duplicates a exception is raised. This prevent the use of both modules at the same time.
>>> from steam import SteamClient
>>> from dota2 import Dota2Client
>>> from csgo import CSGOClient
>>> a = SteamClient()
>>> b = CSGOClient(a)
>>> c = Dota2Client(a)
............................../dota2/protobufs/steammessages_pb2.py in <module>()
5089 _sym_db.RegisterMessage(CMsgGCHVacVerificationChange)
5090
-> 5091 google_dot_protobuf_dot_descriptor__pb2.FieldOptions.RegisterExtension(key_field)
5092 google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(msgpool_soft_limit)
5093 google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(msgpool_hard_limit)
/usr/lib/python2.7/site-packages/google/protobuf/internal/python_message.pyc in RegisterExtension(extension_handle)
754 'field number %d.' %
755 (extension_handle.full_name, actual_handle.full_name,
--> 756 cls.DESCRIPTOR.full_name, extension_handle.number))
757
758 cls._extensions_by_name[extension_handle.full_name] = extension_handle
AssertionError: Extensions "key_field" and "key_field" both try to extend message type "google.protobuf.FieldOptions" with field number 60000.
steammessages.protoon both modules will try to addkey_fieldand other extensions, but since they are duplicates a exception is raised. This prevent the use of both modules at the same time.