__init__.py 文件源码

def _preparse_requirement(self, requires_dist):
        """Convert 'Foobar (1); baz' to ('Foobar ==1', 'baz')
        Split environment marker, add == prefix to version specifiers as
        necessary, and remove parenthesis.
        """
        parts = requires_dist.split(';', 1) + ['']
        distvers = parts[0].strip()
        mark = parts[1].strip()
        distvers = re.sub(self.EQEQ, r"\1==\2\3", distvers)
        distvers = distvers.replace('(', '').replace(')', '')
        return (distvers, mark)