使用Python regex替换部分字符串中出现的所有“pattern”

Question

我想用“-”替换苹果和橙色之间的所有“<；”符号。你知道吗

>>> print re.sub(r'(apple.*)<(.*orange)', r'\1-\2', r'apple < < orange')

apple < - orange

>>> print re.sub(r'(apple.*)<(?=.*orange)', r'\g<1>-', r'apple < < orange')

apple < - orange

Answer 1

对re.sub的一次调用只处理不重叠的匹配。你知道吗

一种方法是暴力：

>>> s = 'apple < < orange'
>>> old = None
>>> while s != old:
...    old = s
...    s = re.sub(r'(apple.*)<(.*orange)', r'\1-\2', s)
... 
>>> print s
apple - - orange