parameters: (self, fileobj)
docstring: Unregister a file object.
  
          Parameters:
          fileobj -- file object or file descriptor
  
          Returns:
          SelectorKey instance
  
          Raises:
          KeyError if fileobj is not registered
  
          Note:
          If fileobj is registered but has since been closed this does
          *not* raise OSError (even if the wrapped syscall does)
docstring_summary: Unregister a file object.
docstring_tokens: Unregister a file object .
function: def unregister(self, fileobj):
          """Unregister a file object.
  
          Parameters:
          fileobj -- file object or file descriptor
  
          Returns:
          SelectorKey instance
  
          Raises:
          KeyError if fileobj is not registered
  
          Note:
          If fileobj is registered but has since been closed this does
          *not* raise OSError (even if the wrapped syscall does)
          """
          raise NotImplementedError
function_tokens: def unregister ( self , fileobj ) : raise NotImplementedError