r*t
2 楼
avoid creating __dict__ for instances from this class. Only enough memory is
used to store attributes appearing in __slots__.
For such instances, there's no __dict__, hence the space saving. Useful if
you are going to have large number of instances from some simple class.
used to store attributes appearing in __slots__.
For such instances, there's no __dict__, hence the space saving. Useful if
you are going to have large number of instances from some simple class.
d*q
3 楼
it sth likes the operator [] overloading in c++
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