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On x86:
>>> np.timedelta64(1) / 0.0
__main__:1: RuntimeWarning: divide by zero encountered in true_divide
__main__:1: RuntimeWarning: invalid value encountered in true_divide
numpy.timedelta64('NaT')
>>> np.timedelta64(1) / 0
numpy.timedelta64('NaT')
On a Raspberry Pi 2 (with the numpy package from Anaconda):
>>> np.timedelta64(1) / 0.0
__main__:1: RuntimeWarning: divide by zero encountered in true_divide
__main__:1: RuntimeWarning: invalid value encountered in true_divide
numpy.timedelta64(-1)
>>> np.timedelta64(1) / 0
numpy.timedelta64('NaT')
Note that it triggers with float division but not integer division.
$ uname -a
Linux raspberrypi 3.18.14-v7+ #2 SMP PREEMPT Thu May 28 18:17:59 UTC 2015 armv7l GNU/Linux
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