如何替换字符串中同时出现的 2 个或更多特殊字符或下划线 Python

Question

我有以下字符串：

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

如果 _ 在字符串中出现多次，我希望将其删除。所以上面应该翻译成：

5weeks_rollingAverage_8hours

tvm

Answer 1

使用正则表达式

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)

输出

5weeks_rollingAverage_8hours
5weeksrollingAverage_8hours
5weeks_rollingAverage_8hours
5weeks_rollingAverage_8hours

Answer 2

你可以像你说的那样对非字母数字使用正则表达式，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： 5weeks_rollingAverage8hours

如何替换字符串中同时出现的 2 个或更多特殊字符或下划线 Python

How to replace 2 or more special characters or underscores appearing together in a string Python

python

string

str-replace