extras.py 文件源码

def parse(self, s, cur, _bsdec=_re.compile(r"\\(.)")):
        """Parse an hstore representation in a Python string.

        The hstore is represented as something like::

            "a"=>"1", "b"=>"2"

        with backslash-escaped strings.
        """
        if s is None:
            return None

        rv = {}
        start = 0
        for m in self._re_hstore.finditer(s):
            if m is None or m.start() != start:
                raise psycopg2.InterfaceError(
                    "error parsing hstore pair at char %d" % start)
            k = _bsdec.sub(r'\1', m.group(1))
            v = m.group(2)
            if v is not None:
                v = _bsdec.sub(r'\1', v)

            rv[k] = v
            start = m.end()

        if start < len(s):
            raise psycopg2.InterfaceError(
                "error parsing hstore: unparsed data after char %d" % start)

        return rv