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). '''
  
          self.flush()
          with _wrap_ptyprocess_err():
              # PtyProcessError may be raised if it is not possible to terminate
              # the child.
              self.ptyproc.close(force=force)
          self.isalive()  # Update exit status from ptyproc
          self.child_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). '''
  
          self.flush()
          with _wrap_ptyprocess_err():
              # PtyProcessError may be raised if it is not possible to terminate
              # the child.
              self.ptyproc.close(force=force)
          self.isalive()  # Update exit status from ptyproc
          self.child_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).