“TypeError 'xxx' object is not callable"是什么意思?方法? [英] What does "TypeError 'xxx' object is not callable" means?

问题描述

作为 Python 的初级开发人员，我在控制台中多次看到此错误消息，但我并不完全理解它的含义.

As a starting developer in Python I've seen this error message many times appearing in my console but I don't fully understand what does it means.

谁能告诉我，一般来说，什么样的动作会产生这个错误?

Could anyone tell me, in a general way, what kind of action produces this error?

推荐答案

当您尝试使用 () 调用一个不是 () 的对象时会发生该错误a href="http://docs.python.org/2/reference/datamodel.html#object.__call__" rel="noreferrer">可调用.

可调用对象可以是函数或类(实现了__call__ 方法).根据 Python 文档:

A callable object can be a function or a class (that implements __call__ method). According to Python Docs:

object.__call__(self[, args...]):当实例作为函数被调用"时调用

object.__call__(self[, args...]): Called when the instance is "called" as a function

例如:

x = 1
print x()

x 不是一个可调用的对象，但你试图调用它，就好像它是它一样.此示例产生错误:

x is not a callable object, but you are trying to call it as if it were it. This example produces the error:

TypeError: 'int' object is not callable

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为了更好地了解什么是可调用对象在另一篇 SO 帖子中阅读此答案.

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