regex.py 文件源码

def try_compile(self):
        """Compile this :class:`Regex` as a Python regular expression.

        .. warning::
           Python regular expressions use a different syntax and different
           set of flags than MongoDB, which uses `PCRE`_. A regular
           expression retrieved from the server may not compile in
           Python, or may match a different set of strings in Python than
           when used in a MongoDB query. :meth:`try_compile()` may raise
           :exc:`re.error`.

        .. _PCRE: http://www.pcre.org/
        """
        return re.compile(self.pattern, self.flags)