text.py 文件源码

def baselevels(self, s, maxlevel=1, brackets="()"):
        """strip parts of a string above a given bracket level
        - return a modified (some parts might be removed) version of the string s
          where all parts inside brackets with level higher than maxlevel are
          removed
        - if brackets do not match (number of left and right brackets is wrong
          or at some points there were more right brackets than left brackets)
          just return the unmodified string"""
        level = 0
        highestlevel = 0
        res = ""
        for c in s:
            if c == brackets[0]:
                level += 1
                if level > highestlevel:
                    highestlevel = level
            if level <= maxlevel:
                res += c
            if c == brackets[1]:
                level -= 1
        if level == 0 and highestlevel > 0:
            return res