<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def create_criteria(cls, query):
 """Return a criteria from a dictionary containing a query. Query should be a dictionary, keyed by field name. If the value is a list, it will be divided into multiple criteria as required. """

        criteria = []
        for name, value in query.items():
            if isinstance(value, list):
                for inner_value in value:
                    criteria += cls.create_criteria({name: inner_value})
            else:
                criteria.append({
                    'criteria': {
                        'field': name,
                        'value': value,
                    },
                })
        return criteria or None