Python function (or set of functions) as input of a function or class

Question

is there a way of having an (yet unkown) function as an argument of a function in python:

def doSomething(<func>):
    #do something with func()

at a later stage, functions could be defined, eg:

def f1(x):
    return x*x

def f2(x):
    return x+1

and I could call now:

doSomething(f1,x1)
doSomething(f2,x1)

@Newtopian: lack of effort, and it should be on Stack Overflow. Scribbled a short answer anyway because why not, but it's not a good question for here. — RemcoGerlich, Sep 13 '16 at 13:24
@RemcoGerlich thanks, indeed better for SO, it has in fact already been answered there :-) I was asking mostly for the OP`s sake, I find rude to downvote without (stating) reason, else how are we to correct innapropriate questions if we are not told what is wrong with them. — Newtopian, Sep 13 '16 at 13:32

RemcoGerlich · Accepted Answer · 2016-09-13 13:19:39Z

1

Functions are perfectly normal objects in Python, so the answer is yes.

def callFunctionTwice(func, arg):
    func(arg)
    func(arg)

def f(a):
    print(a)

callFunctionTwice(f, "hmm")  # Prints "hmm" twice

answered Sep 13 '16 at 13:19

RemcoGerlich

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Community · Accepted Answer · 2017-05-23 12:40:20Z

Somebody answered better than I could at Stack Overflow, be sure to upvote his answer in addition (or instead of) my own if satisfactory.

but for completeness here are the takeaways :

2 Answers 2