Python正则表达式替换引号

您可以采取两个阶段的方法，使用带有替换函数的re.sub.传递给re.sub的正则表达式匹配单独组中的docstring = 和字符串的其余部分，然后替换函数拆分+的其余部分，并用适当转义的版本替换字符串:

def replacer(m):
    res = m[1]
    strings = re.split(r'(\s*\+\s*)(?=(?:[^"]*"(?:[^\\"]|\\.)*"[^"]*)*$)', m[3])
    for i, s in enumerate(strings):
        if i % 2 or not s.startswith('"'):
            res = res + s
        else:
            res = res + 'R""""(' + s.strip()[1:-1] + ')""""'
    return res + ';'

target_text = re.sub(r'((?:docstring|some_detailed_notes)\s*=\s*)(\(\s*)?((?:"(?:[^\\"]|\\.)*"|[^;])+)(?(2)\s*\)|)\s*;', replacer, text)

对于此输入:

docstring = "mystr()" + abc(some_args) + "other \";str";

docstring = "mystr";

docstring = "some \"subs" + some_str + "next";

docstring = (
  some_str + "cde" + some_str + "efg" + another_str + "ghi"
);
'''

这会产生以下结果:

docstring = R""""(mystr())"""" + abc(some_args) + R""""(other \";str)"""";

docstring = R""""(mystr)"""";

docstring = R""""(some \"subs)"""" + some_str + R""""(next)"""";

docstring = some_str + R""""(cde)"""" + some_str + R""""(efg)"""" + another_str + R""""(ghi)"""";