如何在Python中链接多个re.sub（）命令

Question

我想对字符串进行多次re.sub（）替换，并且每次都用不同的字符串替换。

当我有许多子串要替换时，这看起来很重复。有人可以建议一个更好的方法吗？

stuff = re.sub('__this__', 'something', stuff)
stuff = re.sub('__This__', 'when', stuff)
stuff = re.sub(' ', 'this', stuff)
stuff = re.sub('.', 'is', stuff)
stuff = re.sub('__', 'different', stuff).capitalize()

Answer 1

将搜索/替换字符串存储在列表中并循环遍历它：

replacements = [
    ('__this__', 'something'),
    ('__This__', 'when'),
    (' ', 'this'),
    ('.', 'is'),
    ('__', 'different')
]

for old, new in replacements:
    stuff = re.sub(old, new, stuff)

stuff = stuff.capitalize()

Answer 2

tuple = (('__this__', 'something'),('__This__', 'when'),(' ', 'this'),('.', 'is'),('__', 'different'))

for element in tuple:
    stuff = re.sub(element[0], element[1], stuff)