python - AttributeError: 'builtin_function_or_method' 对象没有属性 'replace'

Question

当我尝试在我的程序中使用它时，它说存在属性错误

'builtin_function_or_method' object has no attribute 'replace'

但我不明白为什么。

def verify_anagrams(first, second):
    first=first.lower
    second=second.lower
    first=first.replace(' ','')
    second=second.replace(' ','')
    a='abcdefghijklmnopqrstuvwxyz'
    b=len(first)
    e=0
    for i in a:
        c=first.count(i)
        d=second.count(i)
        if c==d:
            e+=1
    return b==e

Answer 1

您需要通过在 str.lower 方法后面放置 () 来调用:

first=first.lower()
second=second.lower()

否则，first 和second 将被分配给函数对象本身:

>>> first = "ABCDE"
>>> first = first.lower
>>> first
<built-in method lower of str object at 0x01C765A0>
>>>
>>> first = "ABCDE"
>>> first = first.lower()
>>> first
'abcde'
>>>