您可以使用getattr来调用您范围内的函数吗? [英] can you use getattr to call a function within your scope?

问题描述

我正在尝试执行类似的操作，但是我不知道如何调用函数bar.

I'm trying to do something like this, but I can't figure out how to call the function bar.

def foo():
    def bar(baz):
        print('used getattr to call', baz)
    getattr(bar, __call__())('bar')

foo()

注意，这有点不寻常.通常，您将拥有一个对象并在该对象上获得一个属性，该属性可以是一个函数.那么它很容易运行.但是，如果您仅在当前作用域内有一个功能，该怎么办?如何在当前作用域内执行getattr来运行该功能?

Notice, that this is somewhat unusual. Normally you'd have an object and get an attribute on that, which could be a function. then it's easy to run. but what if you just have a function within the current scope - how to do getattr on the current scope to run the function?

推荐答案

您很亲密.要使用getattr，请传递名称的字符串值属性:

You are close. To use getattr, pass the string value of the name of the attribute:

getattr(bar, "__call__")('bar')

即

def foo():
  def bar(baz):
    print('used getattr to call', baz)
  getattr(bar, "__call__")('bar')

foo()

输出:

used getattr to call bar

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