如何替換字符串中一起出現的 2 個或多個特殊字符或下划線 Python

Question

我有以下字符串：

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

如果_在字符串中的任何位置出現多次，我希望刪除它。 所以上面應該翻譯成：

5weeks_rollingAverage_8hours

電視

Answer 1

您可以使用正則表達式，如您所說的非字母數字我們可以使用 [^a-zA-Z0-9] 所以代碼是這樣的：

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

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

Output： 5weeks_rollingAverage8hours

Answer 2

使用正則表達式

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)

output

5weeks_rollingAverage_8hours
5weeksrollingAverage_8hours
5weeks_rollingAverage_8hours
5weeks_rollingAverage_8hours