def create_context_by_bill(bill):
sender_req = RequisitesDB.get_by_id(
UserDB.get_by_id(bill['user'])['requisites'])
recipient_req = RequisitesDB.get_by_id(
ContactorDB.get_by_id(bill['contractor'])['requisites'])
items = ContentDB.get_by_id(bill['content'])['items']
return create_context(sender_req, recipient_req, bill['number'],
bill['date_created'], items)
