In python at runtime determine if an object is a class (old and new type) instance

Question

I am trying to write a deeply nested set of classes, attributes, bound methods, etc. to a HDF5 file using the h5py module for long-term storage. I am really close. The onl

Answer 1

Thanks to @user4815162342, I have been able to get this to work. Here is a slightly modified version that will return True for instances of old- and new-style classes:

#Added the check for old-style class
Py_TPFLAGS_HEAPTYPE = (1L<<9)       # Include/object.h
def is_class_instance(o):
    import types
    return (bool(type(o).__flags__ & Py_TPFLAGS_HEAPTYPE) 
            or type(o) is types.InstanceType)