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test_arrayterator.py
from operator import mul from functools import reduce import numpy as np from numpy.random import randint from numpy.lib import Arrayterator from numpy.testing import assert_ def test(): np.random.seed(np.arange(10)) # Create a random array ndims = randint(5)+1 shape = tuple(randint(10)+1 for dim in range(ndims)) els = reduce(mul, shape) a = np.arange(els) a.shape = shape buf_size = randint(2*els) b = Arrayterator(a, buf_size) # Check that each block has at most ``buf_size`` elements for block in b: assert_(len(block.flat) <= (buf_size or els)) # Check that all elements are iterated correctly assert_(list(b.flat) == list(a.flat)) # Slice arrayterator start = [randint(dim) for dim in shape] stop = [randint(dim)+1 for dim in shape] step = [randint(dim)+1 for dim in shape] slice_ = tuple(slice(*t) for t in zip(start, stop, step)) c = b[slice_] d = a[slice_] # Check that each block has at most ``buf_size`` elements for block in c: assert_(len(block.flat) <= (buf_size or els)) # Check that the arrayterator is sliced correctly assert_(np.all(c.__array__() == d)) # Check that all elements are iterated correctly assert_(list(c.flat) == list(d.flat))
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