mirror of
https://github.com/python-pillow/Pillow.git
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4de5477b61
With the introduction and use of pytest, it is simple and easy to
execute specific tests in isolation through documented command line
arguments. Either by specifying the module path or through the `-k
EXPRESSION` argument. There is no longer any need to provide the
boilerplate:
if __name__ == '__main__':
unittest.main()
To every test file. It is simply noise.
The pattern remains in test files that aren't named with `test_*` as
those files are not discovered and executed by pytest by default.
185 lines
8.5 KiB
Python
185 lines
8.5 KiB
Python
from __future__ import print_function
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from .helper import PillowTestCase
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from PIL import Image
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from PIL import ImageMath
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def pixel(im):
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if hasattr(im, "im"):
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return "%s %r" % (im.mode, im.getpixel((0, 0)))
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else:
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if isinstance(im, int):
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return int(im) # hack to deal with booleans
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print(im)
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A = Image.new("L", (1, 1), 1)
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B = Image.new("L", (1, 1), 2)
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Z = Image.new("L", (1, 1), 0) # Z for zero
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F = Image.new("F", (1, 1), 3)
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I = Image.new("I", (1, 1), 4) # noqa: E741
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A2 = A.resize((2, 2))
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B2 = B.resize((2, 2))
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images = {"A": A, "B": B, "F": F, "I": I}
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class TestImageMath(PillowTestCase):
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def test_sanity(self):
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self.assertEqual(ImageMath.eval("1"), 1)
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self.assertEqual(ImageMath.eval("1+A", A=2), 3)
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self.assertEqual(pixel(ImageMath.eval("A+B", A=A, B=B)), "I 3")
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self.assertEqual(pixel(ImageMath.eval("A+B", images)), "I 3")
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self.assertEqual(pixel(ImageMath.eval("float(A)+B", images)), "F 3.0")
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self.assertEqual(pixel(
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ImageMath.eval("int(float(A)+B)", images)), "I 3")
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def test_ops(self):
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self.assertEqual(pixel(ImageMath.eval("-A", images)), "I -1")
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self.assertEqual(pixel(ImageMath.eval("+B", images)), "L 2")
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self.assertEqual(pixel(ImageMath.eval("A+B", images)), "I 3")
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self.assertEqual(pixel(ImageMath.eval("A-B", images)), "I -1")
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self.assertEqual(pixel(ImageMath.eval("A*B", images)), "I 2")
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self.assertEqual(pixel(ImageMath.eval("A/B", images)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B**2", images)), "I 4")
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self.assertEqual(pixel(
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ImageMath.eval("B**33", images)), "I 2147483647")
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self.assertEqual(pixel(ImageMath.eval("float(A)+B", images)), "F 3.0")
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self.assertEqual(pixel(ImageMath.eval("float(A)-B", images)), "F -1.0")
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self.assertEqual(pixel(ImageMath.eval("float(A)*B", images)), "F 2.0")
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self.assertEqual(pixel(ImageMath.eval("float(A)/B", images)), "F 0.5")
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self.assertEqual(pixel(ImageMath.eval("float(B)**2", images)), "F 4.0")
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self.assertEqual(pixel(
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ImageMath.eval("float(B)**33", images)), "F 8589934592.0")
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def test_logical(self):
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self.assertEqual(pixel(ImageMath.eval("not A", images)), 0)
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self.assertEqual(pixel(ImageMath.eval("A and B", images)), "L 2")
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self.assertEqual(pixel(ImageMath.eval("A or B", images)), "L 1")
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def test_convert(self):
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self.assertEqual(pixel(
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ImageMath.eval("convert(A+B, 'L')", images)), "L 3")
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self.assertEqual(pixel(
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ImageMath.eval("convert(A+B, '1')", images)), "1 0")
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self.assertEqual(pixel(
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ImageMath.eval("convert(A+B, 'RGB')", images)), "RGB (3, 3, 3)")
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def test_compare(self):
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self.assertEqual(pixel(ImageMath.eval("min(A, B)", images)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("max(A, B)", images)), "I 2")
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self.assertEqual(pixel(ImageMath.eval("A == 1", images)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A == 2", images)), "I 0")
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def test_one_image_larger(self):
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self.assertEqual(pixel(ImageMath.eval("A+B", A=A2, B=B)), "I 3")
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self.assertEqual(pixel(ImageMath.eval("A+B", A=A, B=B2)), "I 3")
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def test_abs(self):
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self.assertEqual(pixel(ImageMath.eval("abs(A)", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("abs(B)", B=B)), "I 2")
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def test_binary_mod(self):
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self.assertEqual(pixel(ImageMath.eval("A%A", A=A)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B%B", B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A%B", A=A, B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B%A", A=A, B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z%A", A=A, Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z%B", B=B, Z=Z)), "I 0")
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def test_bitwise_invert(self):
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self.assertEqual(pixel(ImageMath.eval("~Z", Z=Z)), "I -1")
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self.assertEqual(pixel(ImageMath.eval("~A", A=A)), "I -2")
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self.assertEqual(pixel(ImageMath.eval("~B", B=B)), "I -3")
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def test_bitwise_and(self):
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self.assertEqual(pixel(ImageMath.eval("Z&Z", A=A, Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z&A", A=A, Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A&Z", A=A, Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A&A", A=A, Z=Z)), "I 1")
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def test_bitwise_or(self):
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self.assertEqual(pixel(ImageMath.eval("Z|Z", A=A, Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z|A", A=A, Z=Z)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A|Z", A=A, Z=Z)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A|A", A=A, Z=Z)), "I 1")
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def test_bitwise_xor(self):
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self.assertEqual(pixel(ImageMath.eval("Z^Z", A=A, Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z^A", A=A, Z=Z)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A^Z", A=A, Z=Z)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A^A", A=A, Z=Z)), "I 0")
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def test_bitwise_leftshift(self):
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self.assertEqual(pixel(ImageMath.eval("Z<<0", Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z<<1", Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A<<0", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A<<1", A=A)), "I 2")
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def test_bitwise_rightshift(self):
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self.assertEqual(pixel(ImageMath.eval("Z>>0", Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("Z>>1", Z=Z)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A>>0", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A>>1", A=A)), "I 0")
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def test_logical_eq(self):
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self.assertEqual(pixel(ImageMath.eval("A==A", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B==B", B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A==B", A=A, B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B==A", A=A, B=B)), "I 0")
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def test_logical_ne(self):
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self.assertEqual(pixel(ImageMath.eval("A!=A", A=A)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B!=B", B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A!=B", A=A, B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B!=A", A=A, B=B)), "I 1")
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def test_logical_lt(self):
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self.assertEqual(pixel(ImageMath.eval("A<A", A=A)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B<B", B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A<B", A=A, B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B<A", A=A, B=B)), "I 0")
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def test_logical_le(self):
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self.assertEqual(pixel(ImageMath.eval("A<=A", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B<=B", B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A<=B", A=A, B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B<=A", A=A, B=B)), "I 0")
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def test_logical_gt(self):
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self.assertEqual(pixel(ImageMath.eval("A>A", A=A)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B>B", B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("A>B", A=A, B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B>A", A=A, B=B)), "I 1")
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def test_logical_ge(self):
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self.assertEqual(pixel(ImageMath.eval("A>=A", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("B>=B", B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("A>=B", A=A, B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("B>=A", A=A, B=B)), "I 1")
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def test_logical_equal(self):
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self.assertEqual(pixel(ImageMath.eval("equal(A, A)", A=A)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("equal(B, B)", B=B)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("equal(Z, Z)", Z=Z)), "I 1")
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self.assertEqual(pixel(ImageMath.eval("equal(A, B)", A=A, B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("equal(B, A)", A=A, B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("equal(A, Z)", A=A, Z=Z)), "I 0")
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def test_logical_not_equal(self):
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self.assertEqual(pixel(ImageMath.eval("notequal(A, A)", A=A)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("notequal(B, B)", B=B)), "I 0")
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self.assertEqual(pixel(ImageMath.eval("notequal(Z, Z)", Z=Z)), "I 0")
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self.assertEqual(
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pixel(ImageMath.eval("notequal(A, B)", A=A, B=B)), "I 1")
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self.assertEqual(
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pixel(ImageMath.eval("notequal(B, A)", A=A, B=B)), "I 1")
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self.assertEqual(
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pixel(ImageMath.eval("notequal(A, Z)", A=A, Z=Z)), "I 1")
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