<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def and_(*validators):
 """ A validator that composes multiple validators into one. When called on a value, it runs all wrapped validators. :param validators: Arbitrary number of validators. :type validators: callables .. versionadded:: 17.1.0 """

    vals = []
    for validator in validators:
        vals.extend(
            validator._validators
            if isinstance(validator, _AndValidator)
            else [validator]
        )

    return _AndValidator(tuple(vals))