Add trailing underscore to filter_ and use {} as the default dict

github/Organization.py

@@ -469,20 +469,22 @@ class Organization(github.GithubObject.CompletableGithubObject):
             url_parameters
         )
 
-    def get_members(self, filter=github.GithubObject.NotSet,
+    def get_members(self, filter_=github.GithubObject.NotSet,
                     role=github.GithubObject.NotSet):
         """
         :calls: `GET /orgs/:org/members <http://developer.github.com/v3/orgs/members>`_
-        :param filter: string
+        :param filter_: string
         :param role: string
         :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.NamedUser.NamedUser`
         """
-        assert filter is github.GithubObject.NotSet or isinstance(filter, (str, unicode)), filter
-        assert role is github.GithubObject.NotSet or isinstance(role, (str, unicode)), role
+        assert (filter_ is github.GithubObject.NotSet or
+                isinstance(filter_, (str, unicode))), filter_
+        assert (role is github.GithubObject.NotSet or
+                isinstance(role, (str, unicode))), role
 
-        url_parameters = dict()
-        if filter is not github.GithubObject.NotSet:
-            url_parameters["filter"] = filter
+        url_parameters = {}
+        if filter_ is not github.GithubObject.NotSet:
+            url_parameters["filter"] = filter_
         if role is not github.GithubObject.NotSet:
             url_parameters["role"] = role
         return github.PaginatedList.PaginatedList(