human
Solve the following python programming problem given the following code:
@deprecated('theano.gof.utils', msg='Use    a_theano_variable.auto_name    instead')
def give_variables_names(variables):
assistant
#Here is the Python program you requested.

    """Gives unique names to an iterable of variables. Modifies input.
    This function is idempotent.
    """
    names = [var.name for var in variables]
    h = hist(names)
    def bad_var(var):
        return ((not var.name) or (h[var.name] > 1))
    for (i, var) in enumerate(filter(bad_var, variables)):
        var.name = ((var.name or '') + ('_%d' % i))
    if (not unique([str(v) for v in variables])):
        raise ValueError("Not    all    variables    have    unique    names.    Maybe    you've    named    some    of    the    variables    identically")
    return variables