code: def close(self, force=True):
          '''This closes the connection with the child application. Note that
          calling close() more than once is valid. This emulates standard Python
          behavior with files. Set force to True if you want to make sure that
          the child is terminated (SIGKILL is sent if the child ignores SIGHUP
          and SIGINT). '''
          if not self.closed:
              self.flush()
              self.fileobj.close() # Closes the file descriptor
              # Give kernel time to update process status.
              time.sleep(self.delayafterclose)
              if self.isalive():
                  if not self.terminate(force):
                      raise PtyProcessError('Could not terminate the child.')
              self.fd = -1
              self.closed = Truf close(self, force=True):
          '''This closes the connection with the child application. Note that
          calling close() more than once is valid. This emulates standard Python
          behavior with files. Set force to True if you want to make sure that
          the child is terminated (SIGKILL is sent if the child ignores SIGHUP
          and SIGINT). '''
          if not self.closed:
              self.flush()
              self.fileobj.close() # Closes the file descriptor
              # Give kernel time to update process status.
              time.sleep(self.delayafterclose)
              if self.isalive():
                  if not self.terminate(force):
                      raise PtyProcessError('Could not terminate the child.')
              self.fd = -1
              self.closed = True
docs: This closes the connection with the child application. Note that
          calling close() more than once is valid. This emulates standard Python
          behavior with files. Set force to True if you want to make sure that
          the child is terminated (SIGKILL is sent if the child ignores SIGHUP
          and SIGINT).