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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def POINTER(obj):
 """ Create ctypes pointer to object. Notes ----- This function converts None to a real NULL pointer because of bug in how ctypes handles None on 64-bit platforms. """


    p = ctypes.POINTER(obj)
    if not isinstance(p.from_param, classmethod):
        def from_param(cls, x):
            if x is None:
                return cls()
            else:
                return x
        p.from_param = classmethod(from_param)

    return p