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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 create(self, order_increment_id, items_qty, comment=None, email=True, include_comment=False):
 """ Create new shipment for order :param order_increment_id: Order Increment ID :type order_increment_id: str :param items_qty: items qty to ship :type items_qty: associative array (order_item_id ⇒ qty) as dict :param comment: Shipment Comment :type comment: str :param email: send e-mail flag (optional) :type email: bool :param include_comment: include comment in e-mail flag (optional) :type include_comment: bool """

        if comment is None:
            comment = ''
        return self.call(
            'sales_order_shipment.create', [
                order_increment_id, items_qty, comment, email, include_comment
            ]
        )