[Numpy-discussion] Float128 integer comparison

Matthew Brett matthew.brett@gmail....
Sat Oct 15 13:12:41 CDT 2011


Hi,

Continuing the exploration of float128 - can anyone explain this behavior?

>>> np.float64(9223372036854775808.0) == 9223372036854775808L
True
>>> np.float128(9223372036854775808.0) == 9223372036854775808L
False
>>> int(np.float128(9223372036854775808.0)) == 9223372036854775808L
True
>>> np.round(np.float128(9223372036854775808.0)) == np.float128(9223372036854775808.0)
True

Thanks for any pointers,

Best,

Matthew


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