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Getting error “a nonstatic member reference must be relative to a specific object” while both member are in the same class

In C++ you can not access a non static class member from a static method. Make it a normal method and try like below:- Else declare pub as static member Also refer to the below answer C++ static member functions and variables

TypeError: ‘numpy.float64’ object is not callable?

You can’t use the same variable name for a function and a float (in the same namespace). And you both defined a bear function and a bear variable pointing to a float. You need to change one of the two names.