_abnf, _socket: Don't override builtins

websocket/_abnf.py

@@ -344,9 +344,9 @@ class frame_buffer(object):
             # reads is limited by socket buffer and is relatively small,
             # yet passing large numbers repeatedly causes lots of large
             # buffers allocated and then shrunk, which results in fragmentation.
-            bytes = self.recv(min(16384, shortage))
-            self.recv_buffer.append(bytes)
-            shortage -= len(bytes)
+            bytes_ = self.recv(min(16384, shortage))
+            self.recv_buffer.append(bytes_)
+            shortage -= len(bytes_)
 
         unified = six.b("").join(self.recv_buffer)
 

websocket/_socket.py

@@ -74,7 +74,7 @@ def recv(sock, bufsize):
         raise WebSocketConnectionClosedException("socket is already closed.")
 
     try:
-        bytes = sock.recv(bufsize)
+        bytes_ = sock.recv(bufsize)
     except socket.timeout as e:
         message = extract_err_message(e)
         raise WebSocketTimeoutException(message)
@@ -85,10 +85,10 @@ def recv(sock, bufsize):
         else:
             raise
 
-    if not bytes:
+    if not bytes_:
         raise WebSocketConnectionClosedException("Connection is already closed.")
 
-    return bytes
+    return bytes_
 
 
 def recv_line(sock):