[Python-Dev] x64 and the testsuite (original) (raw)

Thomas Heller theller at ctypes.org
Thu May 3 19:03:45 CEST 2007

Kristján Valur Jónsson schrieb:

Hello again. A lot of overflow tests fail in the testsuite, by expecting overflow using sys.maxint. for example this line, 196, in testindex.py: self.assertEqual(x[self.neg:self.pos], (-1, maxint))

On my (virtual) win64-machine, which has less than 1GB, quite some tests fail with MemoryError. The tests pass on 64-bit linux machines, though.

At the moment, I am disabling these tests with if "64 bit" not in sys.version:

So, two questions: Should we add something like sys.maxsize to keep these overflow tests valid? Also, some tests just kill the computer when given large values, that are expected to overflow. Sometimes it would be good to test for a 64 bit machine with virtually infinite ram. Is there a better way than the "64 bit" in sys.version test? Should we have something like sys.bits?

You can use 'struct.calcsize("P")' to find out the pointer size.

Thomas

More information about the Python-Dev mailing list