Include request_id field on PlaidError class (#119)

Author: joyzheng

plaid/errors.py

@@ -9,13 +9,16 @@ class PlaidError(Exception):
                                         safe for programmatic use.
     :ivar   str     display_message:    A user-friendly error message. Not safe
                                         for programmatic use. May be None.
+    :ivar   str     request_id:         A unique id returned for all server
+                                        responses.
     '''
 
-    def __init__(self, message, type, code, display_message):
+    def __init__(self, message, type, code, display_message, request_id=""):
         super(PlaidError, self).__init__(message)
         self.type = type
         self.code = code
         self.display_message = display_message
+        self.request_id = request_id
 
     @staticmethod
     def from_response(response):
@@ -28,7 +31,8 @@ def from_response(response):
         return cls(response['error_message'],
                    response['error_type'],
                    response['error_code'],
-                   response['display_message'])
+                   response['display_message'],
+                   response['request_id'])
 
 
 class InvalidRequestError(PlaidError):

plaid/requester.py

@@ -44,6 +44,7 @@ def http_request(url, method=None, data=None, timeout=DEFAULT_TIMEOUT):
             'error_type': 'API_ERROR',
             'error_code': 'INTERNAL_SERVER_ERROR',
             'display_message': None,
+            'request_id': '',
         })
     if response_body.get('error_type'):
         raise PlaidError.from_response(response_body)