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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 _is_autonomous(indep, exprs):
 """ Whether the expressions for the dependent variables are autonomous. Note that the system may still behave as an autonomous system on the interface of :meth:`integrate` due to use of pre-/post-processors. """

    if indep is None:
        return True
    for expr in exprs:
        try:
            in_there = indep in expr.free_symbols
        except:
            in_there = expr.has(indep)
        if in_there:
            return False
    return True