def ISO_WEEK(expression):
return {'<STR_LIT>': expression}<EOL>
Returns the week number in ISO 8601 format, ranging from 1 to 53.
Week numbers start at 1 with the week (Monday through Sunday) that contains the year’s first Thursday.
See https://docs.mongodb.com/manual/reference/operator/aggregation/isoWeek/
for more details
:param expression: expression or variable of a Date, a Timestamp, or an ObjectID
:return: Aggregation operator