def muvaluid(string):
    """
    Run suite fits: muvaluid returns True/False
    checks the syntax for string function 
    corresponding to flag='l'. Meant for pars
    displaying large changes across the run suite,
    requiring different migrad start guesses.
    """
    try:
        value_times_list = string.split(',')
        last = value_times_list.pop()
        for value_times in value_times_list:
            value, times = value_times.split('*')
            dum, dum = float(value), int(times)
        dum = float(last)
        return True
    except:
        return False
