This function is used to declare an object as a valid constructor. An object is not considered a valid constructor if it is not called. This function raises a TypeError if the object cannot be called.
copyreg.pickle (type, function, constructor = none)
This is used to declare a function as a function " abbreviations "for objects of type type. The function must return either a string or a tuple containing two or three elements.
The constructor parameter is optional. It is a callable object that can be used to restore an object when called with a set of arguments returned by the function during fetch. A TypeError is thrown if the object is a class or the constructor cannot be called.
pickling a C instance ... pickling a C instance ... b'x80x03c__main__ C qx00Kx01x85qx01Rqx02.'
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