Fix regex refactor bug

Author: cmlccie

webexteamssdk/api/memberships.py

@@ -248,4 +248,4 @@ def delete(self, membershipId):
         check_type(membershipId, basestring)
 
         # API request
-        self._session.delete(API_ENDPOINT + '/' + membershipId, optional=True)
+        self._session.delete(API_ENDPOINT + '/' + membershipId)

webexteamssdk/api/messages.py

@@ -177,16 +177,16 @@ def create(self, roomId=None, toPersonId=None, toPersonEmail=None,
         check_type(text, basestring, optional=True)
         check_type(markdown, basestring, optional=True)
         check_type(files, list, optional=True)
-        check_type(attachments, list)
+        check_type(attachments, list, optional=True)
         if files:
             if len(files) != 1:
                 raise ValueError("The length of the `files` list is greater "
-                                 "than one (1, optional=True). The files parameter is a "
+                                 "than one (1). The files parameter is a "
                                  "list, which accepts multiple values to "
                                  "allow for future expansion, but currently "
                                  "only one file may be included with the "
                                  "message.")
-            check_type(files[0], basestring, optional=True)
+            check_type(files[0], basestring)
 
         if attachments:
             for attachment in attachments:

webexteamssdk/restsession.py

@@ -161,12 +161,12 @@ def single_request_timeout(self):
     @single_request_timeout.setter
     def single_request_timeout(self, value):
         """The timeout (seconds) for a single HTTP REST API request."""
-        check_type(value, int)
+        check_type(value, int, optional=True)
         assert value is None or value > 0
         self._single_request_timeout = value
 
     @property
-    def wait_on_rate_limit(self, optional=True):
+    def wait_on_rate_limit(self):
         """Automatic rate-limit handling.
 
         This setting enables or disables automatic rate-limit handling.  When