如何替换字符串中一起出现的 2 个或多个特殊字符或下划线 Python

Question

我有以下字符串。

'___5weeks_rollingAverage_8hours'
'___5weeks__rolling=*%Average_8hours'
'___5weeks_rollingAverage_8hours__'
'___5weeks_rollingAverage_8hours'

我想删除 _ 如果它在字符串中的任何地方出现一次以上。所以上面的内容应该翻译成

5weeks_rollingAverage_8hours

tvm

Answer 1

你可以使用你说的正则表达式，对于非字母数字，我们可以使用[^a-zA-Z0-9]，所以代码是这样的。

import re
regex = re.compile(r'[^a-zA-Z0-9]{2,}')
t = '___5weeks_rollingAverage___8h**ou&%rs'

result = regex.sub("",t)
print(result)

输出： 5周_滚动平均8小时

Answer 2

用regex

import re

test_str = ("___5weeks_rollingAverage_8hours", "___5weeks__rolling=*%Average_8hours",
            "___5weeks_rollingAverage_8hours__", "___5weeks_rollingAverage_8hours")

regex = re.compile(r"[!\"#$%&'()*+,-.\/:;<=>?@\[\\\]^_`{|}~]{2,}")
for item in test_str:
    item = regex.sub('', item)
    print(item)

产出

5weeks_rollingAverage_8hours
5weeksrollingAverage_8hours
5weeks_rollingAverage_8hours
5weeks_rollingAverage_8hours