Derived class and deepcopy

[Philip Smith]

Hi

If I derive a class (eg Matrix) from list I presume this implies the classic
OOP 'is a' relation between the derived and super class.

I therefore presume I can use a derived class in any context that I can use
the superclass.

In the given example I want to apply deepcopy() to the Matrix instance (on
initialisation) to ensure that the list part is not affected by subsequent
changes to the initialising list or Matrix but this gives me a string of
errors (some of which imply I'm trying to copy the class rather than the
instance).

Anyone got any thoughts on this????

Phil

 

[Fredrik Lundh]

In the given example I want to apply deepcopy() to the Matrix instance (on initialisation) to
ensure that the list part is not affected by subsequent changes to the initialising list or Matrix
but this gives me a string of errors (some of which imply I'm trying to copy the class rather than
the instance).

Anyone got any thoughts on this????

where's the example? what errors do you get?

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