[Numpy-discussion] max value of np scalars
Neal Becker
ndbecker2@gmail....
Tue Sep 29 15:52:36 CDT 2009
I need the max value of an np scalar type. I had used this code:
def get_max(is_signed, base_type, total_bits):
print 'get_max:', is_signed, base_type, total_bits
if is_signed:
return (~(base_type(-1) << (total_bits-1)))
else:
print type(base_type (-1) << total_bits)
return (~(base_type (-1) << total_bits))
This doesn't work for e.g., np.uint64. As the 'print' shows,
get_max: False <type 'numpy.uint64'> 10
<type 'long'>
The type of np.uint64 (-1) << 10 is not np.uint64, but long. This seems
very strange to me.
So, 2 questions.
1) Is this expected behavior?
2) How can I correctly implement get_max?
More information about the NumPy-Discussion
mailing list