Python - 替换小写字母 [英] Python - replacing lower case letters

问题描述

<预><代码>>>>导入字符串>>>word = "你好.">>>word2 = word.replace(string.lowercase, '.')>>>打印 word2你好.

我只想把所有的小写字母都变成句号.

我在这里做错了什么?

解决方案

使用正则表达式:

from re import sub打印子([a-z]"，."，你好.")

str.replace 正在寻找将字符串 abcdefghijklmnopqrstuvwxyz 替换为 .，而不是查找要替换的每个字母.

>>> import string
>>> word = "hello."
>>> word2 = word.replace(string.lowercase, '.')
>>> print word2
hello.

I just want all the lowercase letters to turn into full stops.

What am I doing wrong here?

解决方案

Use a regular expression:

from re import sub

print sub("[a-z]", '.', "hello.")

str.replace is looking for the string abcdefghijklmnopqrstuvwxyz to replace it with ., not looking for each individual letter to replace.

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