ImportError: cannot import name namedtuple

Traceback (most recent call last):
  File "zhilian55.py", line 5, in <module>
    import requests
  File "/usr/local/lib/python2.7/dist-packages/requests/__init__.py", line 43, in <module>
    import urllib3
  File "/usr/local/lib/python2.7/dist-packages/urllib3/__init__.py", line 8, in <module>
    from .connectionpool import (
  File "/usr/local/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 3, in <module>
    import logging
  File "/usr/lib/python2.7/logging/__init__.py", line 26, in <module>
    import sys, os, time, cStringIO, traceback, warnings, weakref, collections
  File "/usr/lib/python2.7/collections.py", line 22, in <module>
    from keyword import iskeyword as _iskeyword
  File "/home/python/Desktop/weilai/keyword.py", line 3, in <module>
    import sys, urllib
  File "/usr/lib/python2.7/urllib.py", line 33, in <module>
    from urlparse import urljoin as basejoin
  File "/usr/lib/python2.7/urlparse.py", line 119, in <module>
    from collections import namedtuple

ImportError: cannot import name namedtuple

老铁们运行python项目报这个错误，怎么搞啊？？？