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test_api.py	6.56 KB	-rw-r--r--	2013-04-07 01:04
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test_item_selection.py	2.46 KB	-rw-r--r--	2013-04-07 01:04
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test_multiarray_assignment.py	1.81 KB	-rw-r--r--	2013-04-07 01:04
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test_print.py	9.3 KB	-rw-r--r--	2013-04-07 01:04
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test_umath.py	44.02 KB	-rw-r--r--	2013-04-07 01:04
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test_umath_complex.py	20.05 KB	-rw-r--r--	2013-04-07 01:04
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Rename

import sys

import numpy as np
from numpy.testing import *
from numpy.testing.utils import WarningManager
import warnings

def test_fastCopyAndTranspose():
    # 0D array
    a = np.array(2)
    b = np.fastCopyAndTranspose(a)
    assert_equal(b, a.T)
    assert_(b.flags.owndata)

# 1D array
    a = np.array([3,2,7,0])
    b = np.fastCopyAndTranspose(a)
    assert_equal(b, a.T)
    assert_(b.flags.owndata)

# 2D array
    a = np.arange(6).reshape(2,3)
    b = np.fastCopyAndTranspose(a)
    assert_equal(b, a.T)
    assert_(b.flags.owndata)

def test_array_astype():
    a = np.arange(6, dtype='f4').reshape(2,3)
    # Default behavior: allows unsafe casts, keeps memory layout,
    #                   always copies.
    b = a.astype('i4')
    assert_equal(a, b)
    assert_equal(b.dtype, np.dtype('i4'))
    assert_equal(a.strides, b.strides)
    b = a.T.astype('i4')
    assert_equal(a.T, b)
    assert_equal(b.dtype, np.dtype('i4'))
    assert_equal(a.T.strides, b.strides)
    b = a.astype('f4')
    assert_equal(a, b)
    assert_(not (a is b))

# copy=False parameter can sometimes skip a copy
    b = a.astype('f4', copy=False)
    assert_(a is b)

# order parameter allows overriding of the memory layout,
    # forcing a copy if the layout is wrong
    b = a.astype('f4', order='F', copy=False)
    assert_equal(a, b)
    assert_(not (a is b))
    assert_(b.flags.f_contiguous)

b = a.astype('f4', order='C', copy=False)
    assert_equal(a, b)
    assert_(a is b)
    assert_(b.flags.c_contiguous)

# casting parameter allows catching bad casts
    b = a.astype('c8', casting='safe')
    assert_equal(a, b)
    assert_equal(b.dtype, np.dtype('c8'))

assert_raises(TypeError, a.astype, 'i4', casting='safe')

# subok=False passes through a non-subclassed array
    b = a.astype('f4', subok=0, copy=False)
    assert_(a is b)

a = np.matrix([[0,1,2],[3,4,5]], dtype='f4')

# subok=True passes through a matrix
    b = a.astype('f4', subok=True, copy=False)
    assert_(a is b)

# subok=True is default, and creates a subtype on a cast
    b = a.astype('i4', copy=False)
    assert_equal(a, b)
    assert_equal(type(b), np.matrix)

# subok=False never returns a matrix
    b = a.astype('f4', subok=False, copy=False)
    assert_equal(a, b)
    assert_(not (a is b))
    assert_(type(b) != np.matrix)

def test_copyto_fromscalar():
    a = np.arange(6, dtype='f4').reshape(2,3)

# Simple copy
    np.copyto(a, 1.5)
    assert_equal(a, 1.5)
    np.copyto(a.T, 2.5)
    assert_equal(a, 2.5)

# Where-masked copy
    mask = np.array([[0,1,0],[0,0,1]], dtype='?')
    np.copyto(a, 3.5, where=mask)
    assert_equal(a, [[2.5,3.5,2.5],[2.5,2.5,3.5]])
    mask = np.array([[0,1],[1,1],[1,0]], dtype='?')
    np.copyto(a.T, 4.5, where=mask)
    assert_equal(a, [[2.5,4.5,4.5],[4.5,4.5,3.5]])

def test_copyto():
    a = np.arange(6, dtype='i4').reshape(2,3)

# Simple copy
    np.copyto(a, [[3,1,5], [6,2,1]])
    assert_equal(a, [[3,1,5], [6,2,1]])

# Overlapping copy should work
    np.copyto(a[:,:2], a[::-1, 1::-1])
    assert_equal(a, [[2,6,5], [1,3,1]])

# Defaults to 'same_kind' casting
    assert_raises(TypeError, np.copyto, a, 1.5)

# Force a copy with 'unsafe' casting, truncating 1.5 to 1
    np.copyto(a, 1.5, casting='unsafe')
    assert_equal(a, 1)

# Copying with a mask
    np.copyto(a, 3, where=[True,False,True])
    assert_equal(a, [[3,1,3],[3,1,3]])

# Casting rule still applies with a mask
    assert_raises(TypeError, np.copyto, a, 3.5, where=[True,False,True])

# Lists of integer 0's and 1's is ok too
    np.copyto(a, 4.0, casting='unsafe', where=[[0,1,1], [1,0,0]])
    assert_equal(a, [[3,4,4], [4,1,3]])

# Overlapping copy with mask should work
    np.copyto(a[:,:2], a[::-1, 1::-1], where=[[0,1],[1,1]])
    assert_equal(a, [[3,4,4], [4,3,3]])

# 'dst' must be an array
    assert_raises(TypeError, np.copyto, [1,2,3], [2,3,4])

def test_copy_order():
    a = np.arange(24).reshape(2,1,3,4)
    b = a.copy(order='F')
    c = np.arange(24).reshape(2,1,4,3).swapaxes(2,3)

def check_copy_result(x, y, ccontig, fcontig, strides=False):
        assert_(not (x is y))
        assert_equal(x, y)
        assert_equal(res.flags.c_contiguous, ccontig)
        assert_equal(res.flags.f_contiguous, fcontig)
        if strides:
            assert_equal(x.strides, y.strides)
        else:
            assert_(x.strides != y.strides)

# Validate the initial state of a, b, and c
    assert_(a.flags.c_contiguous)
    assert_(not a.flags.f_contiguous)
    assert_(not b.flags.c_contiguous)
    assert_(b.flags.f_contiguous)
    assert_(not c.flags.c_contiguous)
    assert_(not c.flags.f_contiguous)

# Copy with order='C'
    res = a.copy(order='C')
    check_copy_result(res, a, ccontig=True, fcontig=False, strides=True)
    res = b.copy(order='C')
    check_copy_result(res, b, ccontig=True, fcontig=False, strides=False)
    res = c.copy(order='C')
    check_copy_result(res, c, ccontig=True, fcontig=False, strides=False)
    res = np.copy(a, order='C')
    check_copy_result(res, a, ccontig=True, fcontig=False, strides=True)
    res = np.copy(b, order='C')
    check_copy_result(res, b, ccontig=True, fcontig=False, strides=False)
    res = np.copy(c, order='C')
    check_copy_result(res, c, ccontig=True, fcontig=False, strides=False)

# Copy with order='F'
    res = a.copy(order='F')
    check_copy_result(res, a, ccontig=False, fcontig=True, strides=False)
    res = b.copy(order='F')
    check_copy_result(res, b, ccontig=False, fcontig=True, strides=True)
    res = c.copy(order='F')
    check_copy_result(res, c, ccontig=False, fcontig=True, strides=False)
    res = np.copy(a, order='F')
    check_copy_result(res, a, ccontig=False, fcontig=True, strides=False)
    res = np.copy(b, order='F')
    check_copy_result(res, b, ccontig=False, fcontig=True, strides=True)
    res = np.copy(c, order='F')
    check_copy_result(res, c, ccontig=False, fcontig=True, strides=False)

# Copy with order='K'
    res = a.copy(order='K')
    check_copy_result(res, a, ccontig=True, fcontig=False, strides=True)
    res = b.copy(order='K')
    check_copy_result(res, b, ccontig=False, fcontig=True, strides=True)
    res = c.copy(order='K')
    check_copy_result(res, c, ccontig=False, fcontig=False, strides=True)
    res = np.copy(a, order='K')
    check_copy_result(res, a, ccontig=True, fcontig=False, strides=True)
    res = np.copy(b, order='K')
    check_copy_result(res, b, ccontig=False, fcontig=True, strides=True)
    res = np.copy(c, order='K')
    check_copy_result(res, c, ccontig=False, fcontig=False, strides=True)

if __name__ == "__main__":
    run_module_suite()