parameters: (self)
docstring: Attempts to cancel the computation.
  
      This method does not block.
  
      Returns:
        True if the computation has not yet begun, will not be allowed to take
          place, and determination of both was possible without blocking. False
          under all other circumstances including but not limited to the
          computation's already having begun, the computation's already having
          finished, and the computation's having been scheduled for execution on a
          remote system for which a determination of whether or not it commenced
          before being cancelled cannot be made without blocking.
docstring_summary: Attempts to cancel the computation.
docstring_tokens: Attempts to cancel the computation .
function: def cancel(self):
          """Attempts to cancel the computation.
  
      This method does not block.
  
      Returns:
        True if the computation has not yet begun, will not be allowed to take
          place, and determination of both was possible without blocking. False
          under all other circumstances including but not limited to the
          computation's already having begun, the computation's already having
          finished, and the computation's having been scheduled for execution on a
          remote system for which a determination of whether or not it commenced
          before being cancelled cannot be made without blocking.
      """
          raise NotImplementedError()
function_tokens: def cancel ( self ) : raise NotImplementedError ( )