Am 18.10.2014 um 07:57 schrieb Aaron Meurer:
Right, all deprecated function calls should be removed from the SymPy codebase and test suite. Otherwise we ourselves are not even doing what we say we should do.
If you build your codebase in the expectation of users writing subclasses, you need to keep the deprecated function and actually have to point all code paths towards that deprecated one, so that people who need to override the functionality both for old and new interface need to do it only once.
I'm not sure whether SymPy is intended to support subclassing though. It uses this liberally for its own uses, but that doesn't mean that it's recommended usage for code that uses SymPy.
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