Django: Query using contains each value in a list

Question

I need to perform a django query that checks if a field contains all values within a list. The list will be of varying length

Example

User.objects.filter(first_name__contains=['x','y','z'])

Answer 1

import operator
from django.db.models import Q

User.objects.filter(reduce(operator.and_, (Q(first_name__contains=x) for x in ['x', 'y', 'z'])))

for python 3

from functools import reduce

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