函数 - TypeError：＆＃39; str＆＃39;对象不可调用

Question

我在尝试将功能恢复到自身的开头时遇到了困难。我的代码是：

def questionFour():
    print("")
    global questionsCorrect
    global questionsIncorrect
    print ("What is 4 + 4?")
    questionFour = input (">> ")
    if str.isdigit(questionFour):
        if questionFour.lower() == ("8"):
            questionsCorrect += 1
            questionFive()
        else:
            questionsIncorrect += 1
            questionFive()
    else:
        print ("That's not a number!")
        questionFour()

我遇到了这个问题：

    Traceback (most recent call last):
  File "[hidden]", line 330, in <module>
    questionOne()
  File "[hidden]", line 42, in questionOne
    questionTwo()
  File "[hidden]", line 53, in questionTwo
    questionThree()
  File "[hidden]", line 70, in questionThree
    questionFour()
  File "[hidden]", line 87, in questionFour
    questionFour()
TypeError: 'str' object is not callable

谢谢！

Answer 1

您使用第questionFour = input ...行分配给questionFour。由于Python的作用域，这只会在函数内部保持正确，但会使您无法以递归方式调用它。为输入选择不同的变量名称。