Python中多行文档字符串的正则表达式是什么？

Question

I am working on checking comments and docstrings within a python file. Right now I'm using regex to check and have succeeded finding single and multi-line comments but unable to find multi-line docstrings.

I have tried something like r"""[\\S\\s]*?"""

import re

FILE_SEPARATOR = "/"

MULTILINECOMMENT_RE = r"""/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/"""
SINGLELINECOMMENT_RE_JAVA = r"""^(?:[^"/\\]|\"(?:[^\"\\]|\\.)*
\"|/(?:[^/"\\]|\\.)|/\"(?:[^\"\\]|\\.)*\"|\\.)*//(.*)$"""
SINGLELINECOMMENT_RE_PYTHON = r"""^(?:[^"#\\]|\"(?:[^\"\\]|\\.)*\"|
/(?:[^#"\\]|\\.)|/\"(?:[^\"\\]|\\.)*\"|\\.)*#(.*)$"""
MULTILINEDOCSTRING_RE_PYTHON = r"""[\S\s]*?"""


def count_multiline__docstring_python_comment(contents):
    """Counts the number of multiline Python comments in the code"""
    pattern = re.compile(MULTILINEDOCSTRING_RE_PYTHON, re.MULTILINE)
    matches = pattern.findall(contents)
    return len(matches)

Answer 1

You're not matching the quotes in the docstring. The triple quotes in r"""[\\S\\s]*?""" are just delimiting the regexp string, they're not part of the regexp itself. You need:

r'"""[\S\s]*?"""'

You can also simplify it to just:

r'""".*?"""'

and then use the re.DOTALL flag when matching. This makes . match newlines.

To match only docstrings with at least 2 lines:

r'""".*?\n.*?"""'