def get_callback(self):
        method = self.request.method.upper()
        if method not in self.allowed_methods:
            if self.strict_allowed_methods:
                return None
            else:
                method = 'GET'
        callback = getattr(self, method, getattr(self, 'GET', None))
        return callback
Some platforms (particularly Gentoo on x64) put things in lib64/pythonX.Y
dataset/ETHPy150Open ofri/Open-Knesset/hashnav/base.py/View.get_callback--crossover with--dataset/ETHPy150Open ralfonso/theory/go-pylons.py/fix_lib64