def set_value(self, pymux, cli, value):
        # Translate prefix to prompt_toolkit
        try:
            keys = pymux_key_to_prompt_toolkit_key_sequence(value)
        except ValueError:
            raise SetOptionError('Invalid key: %r' % (value, ))
        else:
            pymux.key_bindings_manager.prefix = keys
dataset/ETHPy150Open jonathanslenders/pymux/pymux/options.py/KeyPrefixOption.set_value/original