import os import warnings from io import BytesIO import pytest from PIL import Image, ImageFile, TiffImagePlugin from PIL.TiffImagePlugin import RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION from .helper import ( assert_image_equal, assert_image_equal_tofile, assert_image_similar, assert_image_similar_tofile, hopper, is_pypy, is_win32, ) try: from defusedxml import ElementTree except ImportError: ElementTree = None class TestFileTiff: def test_sanity(self, tmp_path): filename = str(tmp_path / "temp.tif") hopper("RGB").save(filename) with Image.open(filename) as im: im.load() assert im.mode == "RGB" assert im.size == (128, 128) assert im.format == "TIFF" hopper("1").save(filename) with Image.open(filename): pass hopper("L").save(filename) with Image.open(filename): pass hopper("P").save(filename) with Image.open(filename): pass hopper("RGB").save(filename) with Image.open(filename): pass hopper("I").save(filename) with Image.open(filename): pass @pytest.mark.skipif(is_pypy(), reason="Requires CPython") def test_unclosed_file(self): def open(): im = Image.open("Tests/images/multipage.tiff") im.load() pytest.warns(ResourceWarning, open) def test_closed_file(self): with warnings.catch_warnings(): im = Image.open("Tests/images/multipage.tiff") im.load() im.close() def test_seek_after_close(self): im = Image.open("Tests/images/multipage.tiff") im.close() with pytest.raises(ValueError): im.n_frames with pytest.raises(ValueError): im.seek(1) def test_context_manager(self): with warnings.catch_warnings(): with Image.open("Tests/images/multipage.tiff") as im: im.load() @pytest.mark.parametrize( "path, sizes", ( ("Tests/images/hopper.tif", ()), ("Tests/images/child_ifd.tiff", (16, 8)), ("Tests/images/child_ifd_jpeg.tiff", (20,)), ), ) def test_get_child_images(self, path, sizes): with Image.open(path) as im: ims = im.get_child_images() assert len(ims) == len(sizes) for i, im in enumerate(ims): w = sizes[i] expected = Image.new("RGB", (w, w), "#f00") assert_image_similar(im, expected, 1) def test_mac_tiff(self): # Read RGBa images from macOS [@PIL136] filename = "Tests/images/pil136.tiff" with Image.open(filename) as im: assert im.mode == "RGBA" assert im.size == (55, 43) assert im.tile == [("raw", (0, 0, 55, 43), 8, ("RGBa", 0, 1))] im.load() assert_image_similar_tofile(im, "Tests/images/pil136.png", 1) def test_bigtiff(self): with Image.open("Tests/images/hopper_bigtiff.tif") as im: assert_image_equal_tofile(im, "Tests/images/hopper.tif") @pytest.mark.parametrize( "file_name,mode,size,tile", [ ( "tiff_wrong_bits_per_sample.tiff", "RGBA", (52, 53), [("raw", (0, 0, 52, 53), 160, ("RGBA", 0, 1))], ), ( "tiff_wrong_bits_per_sample_2.tiff", "RGB", (16, 16), [("raw", (0, 0, 16, 16), 8, ("RGB", 0, 1))], ), ( "tiff_wrong_bits_per_sample_3.tiff", "RGBA", (512, 256), [("libtiff", (0, 0, 512, 256), 0, ("RGBA", "tiff_lzw", False, 48782))], ), ], ) def test_wrong_bits_per_sample(self, file_name, mode, size, tile): with Image.open("Tests/images/" + file_name) as im: assert im.mode == mode assert im.size == size assert im.tile == tile im.load() def test_set_legacy_api(self): ifd = TiffImagePlugin.ImageFileDirectory_v2() with pytest.raises(Exception) as e: ifd.legacy_api = None assert str(e.value) == "Not allowing setting of legacy api" def test_xyres_tiff(self): filename = "Tests/images/pil168.tif" with Image.open(filename) as im: # legacy api assert isinstance(im.tag[X_RESOLUTION][0], tuple) assert isinstance(im.tag[Y_RESOLUTION][0], tuple) # v2 api assert isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational) assert isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational) assert im.info["dpi"] == (72.0, 72.0) def test_xyres_fallback_tiff(self): filename = "Tests/images/compression.tif" with Image.open(filename) as im: # v2 api assert isinstance(im.tag_v2[X_RESOLUTION], TiffImagePlugin.IFDRational) assert isinstance(im.tag_v2[Y_RESOLUTION], TiffImagePlugin.IFDRational) with pytest.raises(KeyError): im.tag_v2[RESOLUTION_UNIT] # Legacy. assert im.info["resolution"] == (100.0, 100.0) # Fallback "inch". assert im.info["dpi"] == (100.0, 100.0) def test_int_resolution(self): filename = "Tests/images/pil168.tif" with Image.open(filename) as im: # Try to read a file where X,Y_RESOLUTION are ints im.tag_v2[X_RESOLUTION] = 71 im.tag_v2[Y_RESOLUTION] = 71 im._setup() assert im.info["dpi"] == (71.0, 71.0) @pytest.mark.parametrize( "resolution_unit, dpi", [(None, 72.8), (2, 72.8), (3, 184.912)], ) def test_load_float_dpi(self, resolution_unit, dpi): with Image.open( "Tests/images/hopper_float_dpi_" + str(resolution_unit) + ".tif" ) as im: assert im.tag_v2.get(RESOLUTION_UNIT) == resolution_unit assert im.info["dpi"] == (dpi, dpi) def test_save_float_dpi(self, tmp_path): outfile = str(tmp_path / "temp.tif") with Image.open("Tests/images/hopper.tif") as im: dpi = (72.2, 72.2) im.save(outfile, dpi=dpi) with Image.open(outfile) as reloaded: assert reloaded.info["dpi"] == dpi def test_save_setting_missing_resolution(self): b = BytesIO() with Image.open("Tests/images/10ct_32bit_128.tiff") as im: im.save(b, format="tiff", resolution=123.45) with Image.open(b) as im: assert im.tag_v2[X_RESOLUTION] == 123.45 assert im.tag_v2[Y_RESOLUTION] == 123.45 def test_invalid_file(self): invalid_file = "Tests/images/flower.jpg" with pytest.raises(SyntaxError): TiffImagePlugin.TiffImageFile(invalid_file) TiffImagePlugin.PREFIXES.append(b"\xff\xd8\xff\xe0") with pytest.raises(SyntaxError): TiffImagePlugin.TiffImageFile(invalid_file) TiffImagePlugin.PREFIXES.pop() def test_bad_exif(self): with Image.open("Tests/images/hopper_bad_exif.jpg") as i: # Should not raise struct.error. pytest.warns(UserWarning, i._getexif) def test_save_rgba(self, tmp_path): im = hopper("RGBA") outfile = str(tmp_path / "temp.tif") im.save(outfile) def test_save_unsupported_mode(self, tmp_path): im = hopper("HSV") outfile = str(tmp_path / "temp.tif") with pytest.raises(OSError): im.save(outfile) def test_little_endian(self): with Image.open("Tests/images/16bit.cropped.tif") as im: assert im.getpixel((0, 0)) == 480 assert im.mode == "I;16" b = im.tobytes() # Bytes are in image native order (little endian) assert b[0] == ord(b"\xe0") assert b[1] == ord(b"\x01") def test_big_endian(self): with Image.open("Tests/images/16bit.MM.cropped.tif") as im: assert im.getpixel((0, 0)) == 480 assert im.mode == "I;16B" b = im.tobytes() # Bytes are in image native order (big endian) assert b[0] == ord(b"\x01") assert b[1] == ord(b"\xe0") def test_16bit_r(self): with Image.open("Tests/images/16bit.r.tif") as im: assert im.getpixel((0, 0)) == 480 assert im.mode == "I;16" b = im.tobytes() assert b[0] == ord(b"\xe0") assert b[1] == ord(b"\x01") def test_16bit_s(self): with Image.open("Tests/images/16bit.s.tif") as im: im.load() assert im.mode == "I" assert im.getpixel((0, 0)) == 32767 assert im.getpixel((0, 1)) == 0 def test_12bit_rawmode(self): """Are we generating the same interpretation of the image as Imagemagick is?""" with Image.open("Tests/images/12bit.cropped.tif") as im: # to make the target -- # convert 12bit.cropped.tif -depth 16 tmp.tif # convert tmp.tif -evaluate RightShift 4 12in16bit2.tif # imagemagick will auto scale so that a 12bit FFF is 16bit FFF0, # so we need to unshift so that the integer values are the same. assert_image_equal_tofile(im, "Tests/images/12in16bit.tif") def test_32bit_float(self): # Issue 614, specific 32-bit float format path = "Tests/images/10ct_32bit_128.tiff" with Image.open(path) as im: im.load() assert im.getpixel((0, 0)) == -0.4526388943195343 assert im.getextrema() == (-3.140936851501465, 3.140684127807617) def test_unknown_pixel_mode(self): with pytest.raises(OSError): with Image.open("Tests/images/hopper_unknown_pixel_mode.tif"): pass @pytest.mark.parametrize( "path, n_frames", ( ("Tests/images/multipage-lastframe.tif", 1), ("Tests/images/multipage.tiff", 3), ), ) def test_n_frames(self, path, n_frames): with Image.open(path) as im: assert im.n_frames == n_frames assert im.is_animated == (n_frames != 1) def test_eoferror(self): with Image.open("Tests/images/multipage-lastframe.tif") as im: n_frames = im.n_frames # Test seeking past the last frame with pytest.raises(EOFError): im.seek(n_frames) assert im.tell() < n_frames # Test that seeking to the last frame does not raise an error im.seek(n_frames - 1) def test_multipage(self): # issue #862 with Image.open("Tests/images/multipage.tiff") as im: # file is a multipage tiff: 10x10 green, 10x10 red, 20x20 blue im.seek(0) assert im.size == (10, 10) assert im.convert("RGB").getpixel((0, 0)) == (0, 128, 0) im.seek(1) im.load() assert im.size == (10, 10) assert im.convert("RGB").getpixel((0, 0)) == (255, 0, 0) im.seek(0) im.load() assert im.size == (10, 10) assert im.convert("RGB").getpixel((0, 0)) == (0, 128, 0) im.seek(2) im.load() assert im.size == (20, 20) assert im.convert("RGB").getpixel((0, 0)) == (0, 0, 255) def test_multipage_last_frame(self): with Image.open("Tests/images/multipage-lastframe.tif") as im: im.load() assert im.size == (20, 20) assert im.convert("RGB").getpixel((0, 0)) == (0, 0, 255) def test_frame_order(self): # A frame can't progress to itself after reading with Image.open("Tests/images/multipage_single_frame_loop.tiff") as im: assert im.n_frames == 1 # A frame can't progress to a frame that has already been read with Image.open("Tests/images/multipage_multiple_frame_loop.tiff") as im: assert im.n_frames == 2 # Frames don't have to be in sequence with Image.open("Tests/images/multipage_out_of_order.tiff") as im: assert im.n_frames == 3 def test___str__(self): filename = "Tests/images/pil136.tiff" with Image.open(filename) as im: # Act ret = str(im.ifd) # Assert assert isinstance(ret, str) def test_dict(self): # Arrange filename = "Tests/images/pil136.tiff" with Image.open(filename) as im: # v2 interface v2_tags = { 256: 55, 257: 43, 258: (8, 8, 8, 8), 259: 1, 262: 2, 296: 2, 273: (8,), 338: (1,), 277: 4, 279: (9460,), 282: 72.0, 283: 72.0, 284: 1, } assert dict(im.tag_v2) == v2_tags # legacy interface legacy_tags = { 256: (55,), 257: (43,), 258: (8, 8, 8, 8), 259: (1,), 262: (2,), 296: (2,), 273: (8,), 338: (1,), 277: (4,), 279: (9460,), 282: ((720000, 10000),), 283: ((720000, 10000),), 284: (1,), } assert dict(im.tag) == legacy_tags def test__delitem__(self): filename = "Tests/images/pil136.tiff" with Image.open(filename) as im: len_before = len(dict(im.ifd)) del im.ifd[256] len_after = len(dict(im.ifd)) assert len_before == len_after + 1 @pytest.mark.parametrize("legacy_api", (False, True)) def test_load_byte(self, legacy_api): ifd = TiffImagePlugin.ImageFileDirectory_v2() data = b"abc" ret = ifd.load_byte(data, legacy_api) assert ret == b"abc" def test_load_string(self): ifd = TiffImagePlugin.ImageFileDirectory_v2() data = b"abc\0" ret = ifd.load_string(data, False) assert ret == "abc" def test_load_float(self): ifd = TiffImagePlugin.ImageFileDirectory_v2() data = b"abcdabcd" ret = ifd.load_float(data, False) assert ret == (1.6777999408082104e22, 1.6777999408082104e22) def test_load_double(self): ifd = TiffImagePlugin.ImageFileDirectory_v2() data = b"abcdefghabcdefgh" ret = ifd.load_double(data, False) assert ret == (8.540883223036124e194, 8.540883223036124e194) def test_ifd_tag_type(self): with Image.open("Tests/images/ifd_tag_type.tiff") as im: assert 0x8825 in im.tag_v2 def test_exif(self, tmp_path): def check_exif(exif): assert sorted(exif.keys()) == [ 256, 257, 258, 259, 262, 271, 272, 273, 277, 278, 279, 282, 283, 284, 296, 297, 305, 339, 700, 34665, 34853, 50735, ] assert exif[256] == 640 assert exif[271] == "FLIR" gps = exif.get_ifd(0x8825) assert list(gps.keys()) == [0, 1, 2, 3, 4, 5, 6, 18] assert gps[0] == b"\x03\x02\x00\x00" assert gps[18] == "WGS-84" outfile = str(tmp_path / "temp.tif") with Image.open("Tests/images/ifd_tag_type.tiff") as im: exif = im.getexif() check_exif(exif) im.save(outfile, exif=exif) outfile2 = str(tmp_path / "temp2.tif") with Image.open(outfile) as im: exif = im.getexif() check_exif(exif) im.save(outfile2, exif=exif.tobytes()) with Image.open(outfile2) as im: exif = im.getexif() check_exif(exif) def test_modify_exif(self, tmp_path): outfile = str(tmp_path / "temp.tif") with Image.open("Tests/images/ifd_tag_type.tiff") as im: exif = im.getexif() exif[256] = 100 im.save(outfile, exif=exif) with Image.open(outfile) as im: exif = im.getexif() assert exif[256] == 100 def test_reload_exif_after_seek(self): with Image.open("Tests/images/multipage.tiff") as im: exif = im.getexif() del exif[256] im.seek(1) assert 256 in exif def test_exif_frames(self): # Test that EXIF data can change across frames with Image.open("Tests/images/g4-multi.tiff") as im: assert im.getexif()[273] == (328, 815) im.seek(1) assert im.getexif()[273] == (1408, 1907) @pytest.mark.parametrize("mode", ("1", "L")) def test_photometric(self, mode, tmp_path): filename = str(tmp_path / "temp.tif") im = hopper(mode) im.save(filename, tiffinfo={262: 0}) with Image.open(filename) as reloaded: assert reloaded.tag_v2[262] == 0 assert_image_equal(im, reloaded) def test_seek(self): filename = "Tests/images/pil136.tiff" with Image.open(filename) as im: im.seek(0) assert im.tell() == 0 def test_seek_eof(self): filename = "Tests/images/pil136.tiff" with Image.open(filename) as im: assert im.tell() == 0 with pytest.raises(EOFError): im.seek(-1) with pytest.raises(EOFError): im.seek(1) def test__limit_rational_int(self): from PIL.TiffImagePlugin import _limit_rational value = 34 ret = _limit_rational(value, 65536) assert ret == (34, 1) def test__limit_rational_float(self): from PIL.TiffImagePlugin import _limit_rational value = 22.3 ret = _limit_rational(value, 65536) assert ret == (223, 10) def test_4bit(self): test_file = "Tests/images/hopper_gray_4bpp.tif" original = hopper("L") with Image.open(test_file) as im: assert im.size == (128, 128) assert im.mode == "L" assert_image_similar(im, original, 7.3) def test_gray_semibyte_per_pixel(self): test_files = ( ( 24.8, # epsilon ( # group "Tests/images/tiff_gray_2_4_bpp/hopper2.tif", "Tests/images/tiff_gray_2_4_bpp/hopper2I.tif", "Tests/images/tiff_gray_2_4_bpp/hopper2R.tif", "Tests/images/tiff_gray_2_4_bpp/hopper2IR.tif", ), ), ( 7.3, # epsilon ( # group "Tests/images/tiff_gray_2_4_bpp/hopper4.tif", "Tests/images/tiff_gray_2_4_bpp/hopper4I.tif", "Tests/images/tiff_gray_2_4_bpp/hopper4R.tif", "Tests/images/tiff_gray_2_4_bpp/hopper4IR.tif", ), ), ) original = hopper("L") for epsilon, group in test_files: with Image.open(group[0]) as im: assert im.size == (128, 128) assert im.mode == "L" assert_image_similar(im, original, epsilon) for file in group[1:]: with Image.open(file) as im2: assert im2.size == (128, 128) assert im2.mode == "L" assert_image_equal(im, im2) def test_with_underscores(self, tmp_path): kwargs = {"resolution_unit": "inch", "x_resolution": 72, "y_resolution": 36} filename = str(tmp_path / "temp.tif") hopper("RGB").save(filename, **kwargs) with Image.open(filename) as im: # legacy interface assert im.tag[X_RESOLUTION][0][0] == 72 assert im.tag[Y_RESOLUTION][0][0] == 36 # v2 interface assert im.tag_v2[X_RESOLUTION] == 72 assert im.tag_v2[Y_RESOLUTION] == 36 def test_roundtrip_tiff_uint16(self, tmp_path): # Test an image of all '0' values pixel_value = 0x1234 infile = "Tests/images/uint16_1_4660.tif" with Image.open(infile) as im: assert im.getpixel((0, 0)) == pixel_value tmpfile = str(tmp_path / "temp.tif") im.save(tmpfile) assert_image_equal_tofile(im, tmpfile) def test_strip_raw(self): infile = "Tests/images/tiff_strip_raw.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png") def test_strip_planar_raw(self): # gdal_translate -of GTiff -co INTERLEAVE=BAND \ # tiff_strip_raw.tif tiff_strip_planar_raw.tiff infile = "Tests/images/tiff_strip_planar_raw.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png") def test_strip_planar_raw_with_overviews(self): # gdaladdo tiff_strip_planar_raw2.tif 2 4 8 16 infile = "Tests/images/tiff_strip_planar_raw_with_overviews.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png") def test_tiled_planar_raw(self): # gdal_translate -of GTiff -co TILED=YES -co BLOCKXSIZE=32 \ # -co BLOCKYSIZE=32 -co INTERLEAVE=BAND \ # tiff_tiled_raw.tif tiff_tiled_planar_raw.tiff infile = "Tests/images/tiff_tiled_planar_raw.tif" with Image.open(infile) as im: assert_image_equal_tofile(im, "Tests/images/tiff_adobe_deflate.png") def test_planar_configuration_save(self, tmp_path): infile = "Tests/images/tiff_tiled_planar_raw.tif" with Image.open(infile) as im: assert im._planar_configuration == 2 outfile = str(tmp_path / "temp.tif") im.save(outfile) with Image.open(outfile) as reloaded: assert_image_equal_tofile(reloaded, infile) @pytest.mark.parametrize("mode", ("P", "PA")) def test_palette(self, mode, tmp_path): outfile = str(tmp_path / "temp.tif") im = hopper(mode) im.save(outfile) with Image.open(outfile) as reloaded: assert_image_equal(im.convert("RGB"), reloaded.convert("RGB")) def test_tiff_save_all(self): mp = BytesIO() with Image.open("Tests/images/multipage.tiff") as im: im.save(mp, format="tiff", save_all=True) mp.seek(0, os.SEEK_SET) with Image.open(mp) as im: assert im.n_frames == 3 # Test appending images mp = BytesIO() im = Image.new("RGB", (100, 100), "#f00") ims = [Image.new("RGB", (100, 100), color) for color in ["#0f0", "#00f"]] im.copy().save(mp, format="TIFF", save_all=True, append_images=ims) mp.seek(0, os.SEEK_SET) with Image.open(mp) as reread: assert reread.n_frames == 3 # Test appending using a generator def im_generator(ims): yield from ims mp = BytesIO() im.save(mp, format="TIFF", save_all=True, append_images=im_generator(ims)) mp.seek(0, os.SEEK_SET) with Image.open(mp) as reread: assert reread.n_frames == 3 def test_saving_icc_profile(self, tmp_path): # Tests saving TIFF with icc_profile set. # At the time of writing this will only work for non-compressed tiffs # as libtiff does not support embedded ICC profiles, # ImageFile._save(..) however does. im = Image.new("RGB", (1, 1)) im.info["icc_profile"] = "Dummy value" # Try save-load round trip to make sure both handle icc_profile. tmpfile = str(tmp_path / "temp.tif") im.save(tmpfile, "TIFF", compression="raw") with Image.open(tmpfile) as reloaded: assert b"Dummy value" == reloaded.info["icc_profile"] def test_save_icc_profile(self, tmp_path): im = hopper() assert "icc_profile" not in im.info outfile = str(tmp_path / "temp.tif") icc_profile = b"Dummy value" im.save(outfile, icc_profile=icc_profile) with Image.open(outfile) as reloaded: assert reloaded.info["icc_profile"] == icc_profile def test_save_bmp_compression(self, tmp_path): with Image.open("Tests/images/hopper.bmp") as im: assert im.info["compression"] == 0 outfile = str(tmp_path / "temp.tif") im.save(outfile) def test_discard_icc_profile(self, tmp_path): outfile = str(tmp_path / "temp.tif") with Image.open("Tests/images/icc_profile.png") as im: assert "icc_profile" in im.info im.save(outfile, icc_profile=None) with Image.open(outfile) as reloaded: assert "icc_profile" not in reloaded.info def test_getxmp(self): with Image.open("Tests/images/lab.tif") as im: if ElementTree is None: with pytest.warns(UserWarning): assert im.getxmp() == {} else: xmp = im.getxmp() description = xmp["xmpmeta"]["RDF"]["Description"] assert description[0]["format"] == "image/tiff" assert description[3]["BitsPerSample"]["Seq"]["li"] == ["8", "8", "8"] def test_get_photoshop_blocks(self): with Image.open("Tests/images/lab.tif") as im: assert list(im.get_photoshop_blocks().keys()) == [ 1061, 1002, 1005, 1062, 1037, 1049, 1011, 1034, 10000, 1013, 1016, 1032, 1054, 1050, 1064, 1041, 1044, 1036, 1057, 4000, 4001, ] def test_close_on_load_exclusive(self, tmp_path): # similar to test_fd_leak, but runs on unixlike os tmpfile = str(tmp_path / "temp.tif") with Image.open("Tests/images/uint16_1_4660.tif") as im: im.save(tmpfile) im = Image.open(tmpfile) fp = im.fp assert not fp.closed im.load() assert fp.closed def test_close_on_load_nonexclusive(self, tmp_path): tmpfile = str(tmp_path / "temp.tif") with Image.open("Tests/images/uint16_1_4660.tif") as im: im.save(tmpfile) with open(tmpfile, "rb") as f: im = Image.open(f) fp = im.fp assert not fp.closed im.load() assert not fp.closed # Ignore this UserWarning which triggers for four tags: # "Possibly corrupt EXIF data. Expecting to read 50404352 bytes but..." @pytest.mark.filterwarnings("ignore:Possibly corrupt EXIF data") # Ignore this UserWarning: @pytest.mark.filterwarnings("ignore:Truncated File Read") @pytest.mark.skipif( not os.path.exists("Tests/images/string_dimension.tiff"), reason="Extra image files not installed", ) def test_string_dimension(self): # Assert that an error is raised if one of the dimensions is a string with Image.open("Tests/images/string_dimension.tiff") as im: with pytest.raises(OSError): im.load() @pytest.mark.timeout(6) @pytest.mark.filterwarnings("ignore:Truncated File Read") def test_timeout(self): with Image.open("Tests/images/timeout-6646305047838720") as im: ImageFile.LOAD_TRUNCATED_IMAGES = True im.load() ImageFile.LOAD_TRUNCATED_IMAGES = False @pytest.mark.skipif(not is_win32(), reason="Windows only") class TestFileTiffW32: def test_fd_leak(self, tmp_path): tmpfile = str(tmp_path / "temp.tif") # this is an mmaped file. with Image.open("Tests/images/uint16_1_4660.tif") as im: im.save(tmpfile) im = Image.open(tmpfile) fp = im.fp assert not fp.closed with pytest.raises(OSError): os.remove(tmpfile) im.load() assert fp.closed # this closes the mmap im.close() # this should not fail, as load should have closed the file pointer, # and close should have closed the mmap os.remove(tmpfile)