@@ -402,7 +402,7 @@ def send_and_recv(self, flush = False, event = False, request = None, recv = Fal
         To wait for an event to be received, event should be true.
 
         To wait for a response to a certain request (either an error
-        or a response), request should be set the that request's
+        or a response), request should be set to that request's
         serial number.
 
         To just read any pending data from the server, recv should be true.
 
@@ -1358,7 +1358,7 @@ def __init__(self, display, defer = False, *args, **keys):
         self._display = display
         self._binary = self._request.to_binary(*args, **keys)
         self._serial = None
-        self._data = {}
+        self._data = None
         self._error = None
 
         self._response_lock = lock.allocate_lock()