如何用 Python 中的另一个字符替换字符串中的一个字符? [英] How do I replace a character in a string with another character in Python?

问题描述

我想用！"替换字符串aeiou"中不是i"的每个字符

I want to replace every character that isn't "i" in the string "aeiou" with a "!"

我写道:

def changeWord(word):
    for letter in word:
        if letter != "i":
            word.replace(letter,"!")
    return word

这只是返回原件.我怎样才能返回!!i!!"?

This just returns the original. How can I return "!!i!!"?

推荐答案

Python 中的字符串是不可变的，因此您不能就地更改它们.查看 str.replace 的文档:

Strings in Python are immutable, so you cannot change them in place. Check out the documentation of str.replace:

返回字符串的副本，其中所有出现的子字符串 old 都被 new 替换.如果给出可选参数计数，仅替换第一个计数出现.

Return a copy of the string with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced.

为了让它发挥作用，请执行以下操作:

So to make it work, do this:

def changeWord(word):
    for letter in word:
        if letter != "i":
            word = word.replace(letter,"!")
    return word

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