On Tuesday, 7 February 2012 11:36:04 UTC, newme wrote: > > thank you. > then a basic python question. > how does queryset implement it? > does python also allow operator (e.g. []) overloading? > > It's not usually called overloading in Python, but yes. Classes can define a `__getitem__` method which determines what to do when the square-bracket notation is used. You can see the code here: https://code.djangoproject.com/browser/django/trunk/django/db/models/query.py#L165 -- DR.
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