evil.py

import ctypes

class IntStruct(ctypes.Structure):
    _fields_ = [("ob_refcnt", ctypes.c_long),
                ("ob_type", ctypes.c_void_p),
                ("ob_size", ctypes.c_ulong),
                ("ob_digit", ctypes.c_long)]
    def __repr__(self):
        return ("IntStruct(ob_digit={self.ob_digit}, "
                "refcount={self.ob_refcnt})").format(self=self)

id_113 = id(113)
i_ptr = IntStruct.from_address(id_113)
i_ptr.ob_digit = 4

print ("113 == 4 ? {}".format(113 == 4))
print ("112 + 1 = {}".format(112 + 1))