models.py 文件源码

def from_tsv(cls, line, field_names=None, timezone_in_use=pytz.utc, database=None):
        '''
        Create a model instance from a tab-separated line. The line may or may not include a newline.
        The `field_names` list must match the fields defined in the model, but does not have to include all of them.
        If omitted, it is assumed to be the names of all fields in the model, in order of definition.

        - `line`: the TSV-formatted data.
        - `field_names`: names of the model fields in the data.
        - `timezone_in_use`: the timezone to use when parsing dates and datetimes.
        - `database`: if given, sets the database that this instance belongs to.
        '''
        from six import next
        field_names = field_names or [name for name, field in cls._fields]
        values = iter(parse_tsv(line))
        kwargs = {}
        for name in field_names:
            field = getattr(cls, name)
            kwargs[name] = field.to_python(next(values), timezone_in_use)

        obj = cls(**kwargs)
        if database is not None:
            obj.set_database(database)

        return obj