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| Date | Wed, 04 Jul 2012 19:39:21 -0500 |
| From | Evan Driscoll <driscoll@cs.wisc.edu> |
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| To | Paul Rubin <phr-2012@nightsong.com> |
| Subject | Re: 2 + 2 = 5 |
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On 7/4/2012 14:37, Paul Rubin wrote: > I just came across this (https://gist.github.com/1208215): > > 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...) > > Heh. The author is apparently anonymous, I guess for good reason. Probably just nostalgic for old Fortran, which, supposedly, allowed you to change the values of literals by passing them to a function by reference and then modifying the value. Evan
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Re: 2 + 2 = 5 Evan Driscoll <driscoll@cs.wisc.edu> - 2012-07-04 19:39 -0500
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