Python：如何替換兩個字符串之間的所有內容而不替換字符串？

Question

我有這個字符串

str = ''' 
     // DO NOT REPLACE ME // 
     Anything might be here. Numbers letters, symbols, and other strings. 
     // DO NOT REPLACE ME EITHER // 
     ''' 

我想替換什麼是這兩條線之間的，但我不希望替換這些字符串。我該怎麼做呢？

Answer 1

>>> s = ''' 
     // DO NOT REPLACE ME // 
     Anything might be here. Numbers letters, symbols, and other strings. 
     // DO NOT REPLACE ME EITHER // 
     ''' 
>>> print(s) 

     // DO NOT REPLACE ME // 
     Anything might be here. Numbers letters, symbols, and other strings. 
     // DO NOT REPLACE ME EITHER // 
>>> import re 
>>> start = '// DO NOT REPLACE ME //' 
>>> end = '// DO NOT REPLACE ME EITHER //' 
>>> replacement = 'stuff' 
>>> match = re.match(r'(.+%s\s*).+?(\s*%s.+)' % (start, end), s, re.DOTALL) 
>>> match.groups() 
('\n  // DO NOT REPLACE ME //\n  ', '\n  // DO NOT REPLACE ME EITHER //\n  ') 
>>> new = match.group(1) + replacement + match.group(2) 
>>> print(new) 

     // DO NOT REPLACE ME // 
     stuff 
     // DO NOT REPLACE ME EITHER // 

可能會引起問題，如果start或end包含的特殊字符。在這種情況下，他們沒有。

Answer 2

start = s.find('// DO NOT REPLACE ME //') + len('// DO NOT REPLACE ME //') 
end = s.find('// DO NOT REPLACE ME EITHER //') 
new_string = s[:start] + replacement + s[end:] 

我希望它能幫助