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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def join_left(self, right_table=None, fields=None, condition=None, join_type='LEFT JOIN', schema=None, left_table=None, extract_fields=True, prefix_fields=False, field_prefix=None, allow_duplicates=False):
 """ Wrapper for ``self.join`` with a default join of 'LEFT JOIN' :type right_table: str or dict or :class:`Table <querybuilder.tables.Table>` :param right_table: The table being joined with. This can be a string of the table name, a dict of {'alias': table}, or a ``Table`` instance :type fields: str or tuple or list or :class:`Field <querybuilder.fields.Field>` :param fields: The fields to select from ``right_table``. Defaults to `None`. This can be a single field, a tuple of fields, or a list of fields. Each field can be a string or ``Field`` instance :type condition: str :param condition: The join condition specifying the fields being joined. If the two tables being joined are instances of ``ModelTable`` then the condition should be created automatically. :type join_type: str :param join_type: The type of join (JOIN, LEFT JOIN, INNER JOIN, etc). Defaults to 'JOIN' :type schema: str :param schema: This is not implemented, but it will be a string of the db schema name :type left_table: str or dict or :class:`Table <querybuilder.tables.Table>` :param left_table: The left table being joined with. This can be a string of the table name, a dict of {'alias': table}, or a ``Table`` instance. Defaults to the first table in the query. :type extract_fields: bool :param extract_fields: If True and joining with a ``ModelTable``, then '*' fields will be converted to individual fields for each column in the table. Defaults to True. :type prefix_fields: bool :param prefix_fields: If True, then the joined table will have each of its field names prefixed with the field_prefix. If not field_prefix is specified, a name will be generated based on the join field name. This is usually used with nesting results in order to create models in python or javascript. Defaults to True. :type field_prefix: str :param field_prefix: The field prefix to be used in front of each field name if prefix_fields is set to True. If no field_prefix is set, one will be automatically created based on the join field name. :return: self :rtype: :class:`Query <querybuilder.query.Query>` """

        return self.join(
            right_table=right_table,
            fields=fields,
            condition=condition,
            join_type=join_type,
            schema=schema,
            left_table=left_table,
            extract_fields=extract_fields,
            prefix_fields=prefix_fields,
            field_prefix=field_prefix,
            allow_duplicates=allow_duplicates
        )