让你丫的2+2不等于5！！！！

  import sys
  import ctypes
  pyint_p = ctypes.POINTER(ctypes.c_byte*sys.getsizeof(5))
  five = ctypes.cast(id(5), pyint_p)
  print(2 + 2 == 5) # False
  five.contents[five.contents[:].index(5)] = 4
  print(2 + 2 == 5) # True (must be sufficiently large values of 2 there...)

via