["python","django","django-queryset","django-filter","inequality"]
">", "<", ">=" and "<=" don't work with "filter()" in Django

With = below, I could filter persons by age: qs = Person.objects.filter(age = 20) # ↑ Here But with >, <, >= and <= below, I couldn't filter persons by age: qs = Person.objects.filter(age > 20) # ↑ Here qs = Person.objects.filter(age < 20) # ↑ Here qs = Person.objects.filter(age >= 20) # ↑↑ Here qs = Person.objects.filter(age <= 20) # ↑↑ Here Then, I got the error below: NameError: name 'age' is not defined How can I do greater than(>), greater than or equal to(>=), less than(<) and less than or equal to(>=) with filter() in Django?
Greater than: Person.objects.filter(age__gt=20) Greater than or equal to: Person.objects.filter(age__gte=20) Less than: Person.objects.filter(age__lt=20) Less than or equal to: Person.objects.filter(age__lte=20) You can find them all in [the documentation].(https://docs.djangoproject.com/en/stable/ref/models/querysets/).