Python 类型错误：“str”对象不可调用

TypeError: 'str' object is not callable

提问by LoneDruidOfTheDarkArts

name = raw_input("Welcome soldier. What is your name? ")
print('Ok,', name, ' we need your help.')
print("Do you want to help us? (Yes/No) ")
ans = raw_input().lower()

while True:
    ans = raw_input().lower()("This is one of those times when only Yes/No will do!" "\n"  "So what will it be? Yes? No?")

    ans = raw_input().lower()
    if ans() == 'yes' or 'no':
        break
    if ans == "yes":
        print ("Good!")
    elif ans == "no":
        print("I guess I was wrong about you..." '\n' "Game over.")

When I answer this happens;

当我回答时会发生这种情况；

First a blank line, then if I press the enter key again;

首先是一个空行，然后如果我再次按下回车键；

  File "test.py", line 11, in <module>
    ans = raw_input().lower()("This is one of these times when only Yes/No will
do!" "\n" "So what will it be? Yes? No?")
TypeError: 'str' object is not callable

What seams to be the problem?

什么接缝是问题？

P.S I searched the site but it seams that all the people with the same problem had far more advanced scripts and I did not understand anything.

PS 我搜索了该网站，但发现所有遇到相同问题的人都有更高级的脚本，而我什么也不懂。

采纳答案by phihag

The first error is in the line

第一个错误在行中

ans = raw_input().lower()("This is one of those times when only Yes/No will do!"
                          "\n"  "So what will it be? Yes? No?")

The result of lower()is a string, and parentheses after that mean that the object on the left (the string) gets called. Therefore, you get your error. You want

的结果lower()是一个字符串，后面的括号表示左边的对象（字符串）被调用。因此，你会得到你的错误。你要

ans = raw_input("This is one of those times when only Yes/No will do!\n"
                "So what will it be? Yes? No?").lower()

Also,

还，

if ans() == 'yes' or 'no':

does not what you expect. Again, ansis a string, and parentheses mean that the object on the left (the string) gets called. Therefore, you get your error.

不是你所期望的。同样，ans是一个字符串，括号表示左边的对象（字符串）被调用。因此，你会得到你的错误。

Also, oris a logical operator. Even after removing the parentheses after ans, the code gets evaluated as:

此外，or是一个逻辑运算符。即使在删除之后的括号之后ans，代码也会被评估为：

if (ans == 'yes') or ('no'):

Since a non-empty string ('no') evaluates to the booleanvalue True, this expression is always True. You simply want

由于非空字符串 ( 'no') 的计算结果为布尔值 True，因此该表达式始终为 True。你只是想要

if ans in ('yes', 'no'):

Additionally, you want to unindent the last lines. All in all, try:

此外，您希望取消缩进最后几行。总而言之，尝试：

name = raw_input("Welcome soldier. What is your name? ")
print('Ok, ' + name + ' we need your help.')
ans = raw_input("Do you want to help us? (Yes/No)").lower()
while True:
    if ans in ('yes', 'no'):
        break
    print("This is one of those times when only Yes/No will do!\n")
    ans = raw_input("So what will it be? Yes? No?").lower()

if ans == "yes":
    print("Good!")
elif ans == "no":
    print("I guess I was wrong about you..." '\n' "Game over.")

回答by BrenBarn

You need to do raw_input("This is one of those times when only Yes/No will do!" "\n" "So what will it be? Yes? No?").lower().

你需要做raw_input("This is one of those times when only Yes/No will do!" "\n" "So what will it be? Yes? No?").lower()。

When you do raw_input().lower(), that already calls raw_input()and converts the result to lowercase. By that time it's too late to try to pass your prompt string.

当你这样做时raw_input().lower()，它已经调用raw_input()并将结果转换为小写。到那时尝试传递提示字符串为时已晚。

回答by bakkal

TypeError: 'str' object is not callableusually means you are using your ()notation on a string, and Python tries to use that strobject as a function. e.g. "hello world"(), or "hello"("world")

TypeError: 'str' object is not callable通常意味着您()在字符串上使用您的符号，而 Python 尝试将该str对象用作函数。例如"hello world"()，或"hello"("world")

I think you meant to do :

我想你的意思是：

ans = raw_input("This is one of those times...").lower()

Another mistake:

另一个错误：

if ans() == 'yes' or 'no':

You have to check for both conditions individually,

您必须分别检查这两个条件，

Should be :

应该 ：

 if ans == 'yes' or ans == 'no':
        break

or more inline with what you wanted in the first place:

或者更符合您最初想要的：

if ans in ('yes', 'no')