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- import os
- import numpy as np
- import tempfile
- from pytest import raises as assert_raises
- from numpy.testing import assert_equal, assert_
- from scipy.sparse import (csc_matrix, csr_matrix, bsr_matrix, dia_matrix,
- coo_matrix, save_npz, load_npz, dok_matrix)
- DATA_DIR = os.path.join(os.path.dirname(__file__), 'data')
- def _save_and_load(matrix):
- fd, tmpfile = tempfile.mkstemp(suffix='.npz')
- os.close(fd)
- try:
- save_npz(tmpfile, matrix)
- loaded_matrix = load_npz(tmpfile)
- finally:
- os.remove(tmpfile)
- return loaded_matrix
- def _check_save_and_load(dense_matrix):
- for matrix_class in [csc_matrix, csr_matrix, bsr_matrix, dia_matrix, coo_matrix]:
- matrix = matrix_class(dense_matrix)
- loaded_matrix = _save_and_load(matrix)
- assert_(type(loaded_matrix) is matrix_class)
- assert_(loaded_matrix.shape == dense_matrix.shape)
- assert_(loaded_matrix.dtype == dense_matrix.dtype)
- assert_equal(loaded_matrix.toarray(), dense_matrix)
- def test_save_and_load_random():
- N = 10
- np.random.seed(0)
- dense_matrix = np.random.random((N, N))
- dense_matrix[dense_matrix > 0.7] = 0
- _check_save_and_load(dense_matrix)
- def test_save_and_load_empty():
- dense_matrix = np.zeros((4,6))
- _check_save_and_load(dense_matrix)
- def test_save_and_load_one_entry():
- dense_matrix = np.zeros((4,6))
- dense_matrix[1,2] = 1
- _check_save_and_load(dense_matrix)
- def test_malicious_load():
- class Executor:
- def __reduce__(self):
- return (assert_, (False, 'unexpected code execution'))
- fd, tmpfile = tempfile.mkstemp(suffix='.npz')
- os.close(fd)
- try:
- np.savez(tmpfile, format=Executor())
- # Should raise a ValueError, not execute code
- assert_raises(ValueError, load_npz, tmpfile)
- finally:
- os.remove(tmpfile)
- def test_py23_compatibility():
- # Try loading files saved on Python 2 and Python 3. They are not
- # the same, since files saved with SciPy versions < 1.0.0 may
- # contain unicode.
- a = load_npz(os.path.join(DATA_DIR, 'csc_py2.npz'))
- b = load_npz(os.path.join(DATA_DIR, 'csc_py3.npz'))
- c = csc_matrix([[0]])
- assert_equal(a.toarray(), c.toarray())
- assert_equal(b.toarray(), c.toarray())
- def test_implemented_error():
- # Attempts to save an unsupported type and checks that an
- # NotImplementedError is raised.
- x = dok_matrix((2,3))
- x[0,1] = 1
- assert_raises(NotImplementedError, save_npz, 'x.npz', x)
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