Python 实战（5）：拿来主义

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Traceback (most recent call last):
  File "E:\Program Files\Python279\lib\site-packages\web\wsgiserver\__init__.py", line 1245, in communicate
    req.respond()
  File "E:\Program Files\Python279\lib\site-packages\web\wsgiserver\__init__.py", line 775, in respond
    self.server.gateway(self).respond()
  File "E:\Program Files\Python279\lib\site-packages\web\wsgiserver\__init__.py", line 2018, in respond
    response = self.req.server.wsgi_app(self.env, self.start_response)
  File "E:\Program Files\Python279\lib\site-packages\web\httpserver.py", line 306, in __call__
    return self.app(environ, xstart_response)
  File "E:\Program Files\Python279\lib\site-packages\web\httpserver.py", line 274, in __call__
    return self.app(environ, start_response)
  File "E:\Program Files\Python279\lib\site-packages\web\application.py", line 279, in wsgi
    result = self.handle_with_processors()
  File "E:\Program Files\Python279\lib\site-packages\web\application.py", line 249, in handle_with_processors
    return process(self.processors)
  File "E:\Program Files\Python279\lib\site-packages\web\application.py", line 245, in process
    print >> web.debug, traceback.format_exc()
  File "E:\Program Files\Python279\lib\site-packages\web\webapi.py", line 478, in _debugwrite
    out.write(x)
IOError: [Errno 22] Invalid argument
我这个错是什么原因？