Python正则表达式查找所有单个字母字符 [英] Python regex find all single alphabetical characters

问题描述

我想查找字符串中每个出现的单个字母字符的所有索引。我不想捕获单个char html代码。

I want to find all indexes for each occurrence of single alphabetical characters in a string. I don't want to catch single char html codes.

这是我的代码：

import re
s = "fish oil B stack peanut c <b>"
words = re.finditer('\S+', s)
has_alpha = re.compile(??????).search
for word in words:
    if has_alpha(word.group()):
        print (word.start())

所需输出：

9
24

推荐答案

使用您的格式（），但只添加一个简单的检查。

Using your format (as you wanted) but adding only a simple check.

import re
s = "fish oil B stack peanut c <b>"
words = re.finditer('\S+', s)
has_alpha = re.compile(r'[a-zA-Z]').search
for word in words:
    if len(word.group()) == 1 and has_alpha(word.group()):
        print (word.start())
>>> 
9
24

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