25 

    26 # regex special chars pulled from https://bugs.python.org/issue29995

    27 # which was part of Python 3.7.

    28 _respecial = pycompat.bytestr(b'()[]{}?*+-|^$\\.# \t\n\r\v\f')

    29 _regexescapemap = {ord(i): (b'\\' + i).decode('latin1') for i in _respecial}

    30 

    31 def reescape(pat):

    32     """Drop-in replacement for re.escape."""

    33     # NOTE: it is intentional that this works on unicodes and not

    34     # bytes, as it's only possible to do the escaping with

    35     # unicode.translate, not bytes.translate. Sigh.

    36     wantuni = True

    37     if isinstance(pat, bytes):

    38         wantuni = False

    39         pat = pat.decode('latin1')

    40     pat = pat.translate(_regexescapemap)

    41     if wantuni:

    42         return pat

    43     return pat.encode('latin1')