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python Programming Glossary: a.viewReading and storing arbitrary byte length integers from a file http://stackoverflow.com/questions/11508010/reading-and-storing-arbitrary-byte-length-integers-from-a-file 6 np.dtype ' i8' for i in range 3 e.view dtype ' i2' i 1 4 a.view dtype ' i2' i 3 hex x for x in e share improve this answer..
Find unique rows in numpy.array http://stackoverflow.com/questions/16970982/find-unique-rows-in-numpy-array method a np.random.randint 2 size 10000 6 timeit np.unique a.view np.dtype np.void a.dtype.itemsize a.shape 1 .view a.dtype .reshape.. loop a np.random.randint 2 size 10000 100 timeit np.unique a.view np.dtype np.void a.dtype.itemsize a.shape 1 .view a.dtype .reshape..
sorting arrays in numpy by column http://stackoverflow.com/questions/2828059/sorting-arrays-in-numpy-by-column numpy as np In 2 a np.array 1 2 3 4 5 6 0 0 1 In 3 np.sort a.view 'i8 i8 i8' order 'f1' axis 0 .view np.int Out 3 array 0 0 1.. Out 3 array 0 0 1 1 2 3 4 5 6 To sort it in place In 6 a.view 'i8 i8 i8' .sort order 'f1' axis 0 # returns None In 7 a Out..
Numpy: Joining structured arrays? http://stackoverflow.com/questions/5355744/numpy-joining-structured-arrays in zip arrays sizes offsets joint offset offset size a.view numpy.uint8 .reshape n size dtype sum a.dtype.descr for a in..
How to hash a large object (dataset) in Python? http://stackoverflow.com/questions/806151/how-to-hash-a-large-object-dataset-in-python import hashlib import numpy a numpy.random.rand 10 100 b a.view numpy.uint8 print a.dtype b.dtype # a and b have a different..
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