![星号（*）作为python函数的自变量[重复]](http://www.mshxw.com/aiimages/31/661333.png "星号（*）作为python函数的自变量[重复]")
该
*指示的位置参数的结尾。此后的每个参数只能由关键字指定。这在PEP
3102中定义
>>> def foo1(a, b=None):... print(a, b)...>>> def foo2(a, *, b=None):... print(a, b)...>>> foo1(1, 2)1 2>>> foo2(1, 2)Traceback (most recent call last): File "<stdin>", line 1, in <module>TypeError: foo1() takes 1 positional argument but 2 were given>>> foo2(1, b=2)1 2
