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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def execute(self, command):
 """ Executes command on remote hosts :type command: str :param command: command to be run on remote host """

        try:
            if self.ssh.get_transport() is not None:
                logger.debug('{0}: executing "{1}"'.format(self.target_address,
                                                           command))
                stdin, stdout, stderr = self.ssh.exec_command(command)
                return dict(zip(['stdin', 'stdout', 'stderr'],
                                [stdin, stdout, stderr]))
            else:
                raise SSHConnectionError(self.target_address,
                                         "ssh transport is closed")
        except (AuthenticationException, SSHException,
                ChannelException, SocketError) as ex:
            logger.critical(("{0} execution failed on {1} with exception:"
                             "{2}".format(command, self.target_address,
                                               ex)))
            raise SSHCommandError(self.target_address, command, ex)