从单词中删除数字

Question

假设我有一个句子，其中包含单词、整数和它们的组合：

"This is a string with an integer 1 and a 2 and a 3 and a 1A69 and a 1B and a C3"

是否有可能从由字母和数字组成的单词中删除所有整数？例如，我希望上述内容变为

"This is a string with an integer 1 and a 2 and a 3 and a A and a B and a C"

- N08

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你应该使用正则表达式！ - marcuse

Answer 1

一种选择是移除在字母前面（使用零宽度正回顾后缀 ?<= 语法）或者后面（使用零宽度正预测后缀 ?= 语法）的数字：

import re
s = "This is a string with an integer 1 and a 2 and a 3 and a 1A69 and a 1B and a C3"

re.sub(r'\d+(?=[a-zA-Z])|(?<=[a-zA-Z])\d+', '', s)
# 'This is a string with an integer 1 and a 2 and a 3 and a A and a B and a C'

- Psidom

Answer 2

或者，不使用正则表达式：

def remove_digits(s):
    return ''.join([x for x in s if not x.isdigit()])

def is_combined(s):
    return any(x.isalpha() for x in s) and any(x.isdigit() for x in s)

' '.join([remove_digits(x) if is_combined(x) else x for x in test.split()])

- Maroun