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from numpy.testing import assert_raises
import numpy as np
from .. import all
from .._creation_functions import asarray
from .._dtypes import float64, int8
from .._manipulation_functions import (
concat,
reshape,
stack
)
def test_concat_errors():
assert_raises(TypeError, lambda: concat((1, 1), axis=None))
assert_raises(TypeError, lambda: concat([asarray([1], dtype=int8),
asarray([1], dtype=float64)]))
def test_stack_errors():
assert_raises(TypeError, lambda: stack([asarray([1, 1], dtype=int8),
asarray([2, 2], dtype=float64)]))
def test_reshape_copy():
a = asarray(np.ones((2, 3)))
b = reshape(a, (3, 2), copy=True)
assert not np.shares_memory(a._array, b._array)
a = asarray(np.ones((2, 3)))
b = reshape(a, (3, 2), copy=False)
assert np.shares_memory(a._array, b._array)
a = asarray(np.ones((2, 3)).T)
b = reshape(a, (3, 2), copy=True)
assert_raises(AttributeError, lambda: reshape(a, (2, 3), copy=False))