使用ABC和XYZ作为具有后向和前向断言的锚点:

Use ABC and XYZ as anchors with look-behind and look-ahead assertions:

(?<=ABC).*?(?=XYZ)

(?<=...)后视断言仅在文本中以ABC开头的位置匹配.同样，(?=XYZ)在XYZ后面的位置匹配.它们共同形成了两个锚点，这些锚点限制了.*表达式，该表达式可以匹配任何内容.

The (?<=...) look-behind assertion only matches at the location in the text that was preceded by ABC. Similarly, (?=XYZ) matches at the location that is followed by XYZ. Together they form two anchors that limit the .* expression, which matches anything.

您可以使用re.findall()找到所有此类锚定文本:

You can find all such anchored pieces of text with re.findall():

for matchedtext in re.findall(r'(?<=ABC).*?(?=XYZ)', inputtext):

如果ABC和XYZ是变量，则要在它们上使用re.escape()(以防止将其任何内容解释为正则表达式语法)并进行插值:

If ABC and XYZ are variable, you want to use re.escape() (to prevent any of their content from being interpreted as regular expression syntax) on them and interpolate:

re.match(r'(?<={}).*?(?={})'.format(abc, xyz), inputtext)