How to use the bbopt.util.all_isinstance function in bbopt

def handle_weibullvariate(args):
    if len(args) != 2 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to weibullvariate", args)

def handle_normalvariate(args):
    if len(args) != 2 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to normalvariate", args)

def handle_gammavariate(args):
    if len(args) != 2 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to gammavariate", args)

def handle_expovariate(args):
    if len(args) != 1 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to expovariate", args)

def handle_triangular(args):
    if len(args) != 3 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to triangular", args)

def handle_vonmisesvariate(args):
    if len(args) != 2 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to vonmisesvariate", args)

def handle_uniform(args):
    if len(args) != 2 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to uniform", args)

def handle_paretovariate(args):
    if len(args) != 1 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to paretovariate", args)

def handle_betavariate(args):
    if len(args) != 2 or not all_isinstance(args, Num):
        raise format_err(ValueError, "invalid arguments to betavariate", args)

def handle_randrange(args):
    if not all_isinstance(args, int):
        raise format_err(ValueError, "arguments to randrange must be integers, not", args)
    if len(args) == 1:
        start, stop, step = 0, args[0], 1
    elif len(args) == 2:
        start, stop, step = args[0], args[1], 1
    elif len(args) == 3:
        start, stop, step = args
    else:
        raise format_err(ValueError, "randrange expects between 1 and 3 arguments, not", args)
    if start > stop:
        raise format_err(ValueError, "randrange start must be less than stop")
    return [start, stop, step]