修复:pip 'module' object has no attribute '_handlerList'

问题

在运行pip install xxx
出现 ‘module’ object has no attribute ‘_handlerList’

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.7/bin/pip", line 11, in 
    
  
    load_entry_point( 
   'pip==9.0.1', 
   'console_scripts', 
   'pip')() File 
   "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/__init__.py", 
   line 
   233, 
   in main 
   return 
   command.main(cmd_args) File 
   "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/basecommand.py", 
   line 
   185, 
   in main 
   for name 
   in [ 
   "pip._vendor", 
   "distlib", 
   "requests", 
   "urllib3"] File 
   "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/compat/dictconfig.py", 
   line 
   565, 
   in dictConfig dictConfigClass(config).configure() File 
   "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/compat/dictconfig.py", 
   line 
   332, 
   in configure del logging. 
   _handlerList[:] AttributeError: 
   'module' object has no attribute 
   '_handlerList' 
  
   
 

    解决

    方法1、升级pip
    easy_install –upgrade pip
    方法2、
    pip install requests==2.6