expressions.py 文件源码

def __init__(self, lookup, lookup_type, tzinfo):
        super(DateTime, self).__init__(output_field=fields.DateTimeField())
        self.lookup = lookup
        self.col = None
        self.lookup_type = lookup_type
        if tzinfo is None:
            self.tzname = None
        else:
            self.tzname = timezone._get_timezone_name(tzinfo)
        self.tzinfo = tzinfo