存储函数时如何传递预定义的参数 [英] How to pass predefined arguments when storing a function

问题描述

是否可以存储带有预定义参数的函数以供另一个函数调用?

Is it possible to store a function with predefined arguments to be called by another function?

例如:

def function(num):
    print num

trigger=function #store function(1)
trigger()        #prints 1

trigger=function #store function(2)
trigger()        #prints 2

trigger调用存储的任何内容而不传递任何参数.我可以更改触发器，但是这需要我重写调用触发器的函数，所以我想知道在将函数存储在变量中时是否存在一种将函数与参数一起存储的方法.

trigger calls whatever is stored without passing any arguments. I can change trigger but that would require me to rewrite the function that calls the trigger, so I'm wondering if there is a way to store functions along with arguments when storing a function in a variable.

推荐答案

您正在寻找 functools.partial :

You're looking for functools.partial:

>>> import functools
>>> def foo(number):
...     print number
... 
>>> bar = functools.partial(foo, 1)
>>> bar()
1

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