Added type hints to Image.__init__()

Tests/test_box_blur.py

@@ -24,6 +24,7 @@ def test_imageops_box_blur() -> None:
 
 
 def box_blur(image: Image.Image, radius: float = 1, n: int = 1) -> Image.Image:
+    assert image.im is not None
     return image._new(image.im.box_blur((radius, radius), n))
 
 

Tests/test_color_lut.py

@@ -47,6 +47,7 @@ class TestColorLut3DCoreAPI:
 
     def test_wrong_args(self) -> None:
         im = Image.new("RGB", (10, 10), 0)
+        assert im.im is not None
 
         with pytest.raises(ValueError, match="filter"):
             im.im.color_lut_3d(
@@ -107,6 +108,7 @@ class TestColorLut3DCoreAPI:
 
     def test_correct_args(self) -> None:
         im = Image.new("RGB", (10, 10), 0)
+        assert im.im is not None
 
         im.im.color_lut_3d(
             "RGB", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
@@ -143,51 +145,60 @@ class TestColorLut3DCoreAPI:
     def test_wrong_mode(self) -> None:
         with pytest.raises(ValueError, match="wrong mode"):
             im = Image.new("L", (10, 10), 0)
+            assert im.im is not None
             im.im.color_lut_3d(
                 "RGB", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
             )
 
         with pytest.raises(ValueError, match="wrong mode"):
             im = Image.new("RGB", (10, 10), 0)
+            assert im.im is not None
             im.im.color_lut_3d(
                 "L", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
             )
 
         with pytest.raises(ValueError, match="wrong mode"):
             im = Image.new("L", (10, 10), 0)
+            assert im.im is not None
             im.im.color_lut_3d(
                 "L", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
             )
 
         with pytest.raises(ValueError, match="wrong mode"):
             im = Image.new("RGB", (10, 10), 0)
+            assert im.im is not None
             im.im.color_lut_3d(
                 "RGBA", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
             )
 
         with pytest.raises(ValueError, match="wrong mode"):
             im = Image.new("RGB", (10, 10), 0)
+            assert im.im is not None
             im.im.color_lut_3d(
                 "RGB", Image.Resampling.BILINEAR, *self.generate_identity_table(4, 3)
             )
 
     def test_correct_mode(self) -> None:
         im = Image.new("RGBA", (10, 10), 0)
+        assert im.im is not None
         im.im.color_lut_3d(
             "RGBA", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
         )
 
         im = Image.new("RGBA", (10, 10), 0)
+        assert im.im is not None
         im.im.color_lut_3d(
             "RGBA", Image.Resampling.BILINEAR, *self.generate_identity_table(4, 3)
         )
 
         im = Image.new("RGB", (10, 10), 0)
+        assert im.im is not None
         im.im.color_lut_3d(
             "HSV", Image.Resampling.BILINEAR, *self.generate_identity_table(3, 3)
         )
 
         im = Image.new("RGB", (10, 10), 0)
+        assert im.im is not None
         im.im.color_lut_3d(
             "RGBA", Image.Resampling.BILINEAR, *self.generate_identity_table(4, 3)
         )
@@ -202,6 +213,7 @@ class TestColorLut3DCoreAPI:
                 g.transpose(Image.Transpose.ROTATE_180),
             ],
         )
+        assert im.im is not None
 
         # Fast test with small cubes
         for size in [2, 3, 5, 7, 11, 16, 17]:
@@ -238,6 +250,7 @@ class TestColorLut3DCoreAPI:
                 g.transpose(Image.Transpose.ROTATE_180),
             ],
         )
+        assert im.im is not None
 
         # Red channel copied to alpha
         assert_image_equal(
@@ -262,6 +275,7 @@ class TestColorLut3DCoreAPI:
                 g.transpose(Image.Transpose.ROTATE_270),
             ],
         )
+        assert im.im is not None
 
         assert_image_equal(
             im,
@@ -284,6 +298,7 @@ class TestColorLut3DCoreAPI:
                 g.transpose(Image.Transpose.ROTATE_180),
             ],
         )
+        assert im.im is not None
 
         # Reverse channels by splitting and using table
         # fmt: off
@@ -309,6 +324,7 @@ class TestColorLut3DCoreAPI:
                 g.transpose(Image.Transpose.ROTATE_180),
             ],
         )
+        assert im.im is not None
 
         # fmt: off
         transformed = im._new(im.im.color_lut_3d('RGB', Image.Resampling.BILINEAR,

Tests/test_file_webp.py

@@ -250,6 +250,7 @@ class TestFileWebp:
         temp_file = str(tmp_path / "temp.webp")
         im = Image.new("RGBA", (1, 1)).convert("P")
         assert im.mode == "P"
+        assert im.palette is not None
         assert im.palette.mode == "RGBA"
         im.save(temp_file)
 

Tests/test_image.py

@@ -695,11 +695,13 @@ class TestImage:
             image: Image.Image,
             palette_result: ImagePalette.ImagePalette | None = None,
         ) -> None:
+            assert image.im is not None
             new_image = base_image._new(image.im)
             assert new_image.mode == image.mode
             assert new_image.size == image.size
             assert new_image.info == base_image.info
             if palette_result is not None:
+                assert new_image.palette is not None
                 assert new_image.palette.tobytes() == palette_result.tobytes()
             else:
                 assert new_image.palette is None
@@ -990,12 +992,14 @@ class TestImage:
         # P mode with RGBA palette
         im = Image.new("RGBA", (1, 1)).convert("P")
         assert im.mode == "P"
+        assert im.palette is not None
         assert im.palette.mode == "RGBA"
         assert im.has_transparency_data
 
     def test_apply_transparency(self) -> None:
         im = Image.new("P", (1, 1))
         im.putpalette((0, 0, 0, 1, 1, 1))
+        assert im.palette is not None
         assert im.palette.colors == {(0, 0, 0): 0, (1, 1, 1): 1}
 
         # Test that no transformation is applied without transparency
@@ -1013,13 +1017,16 @@ class TestImage:
         im.putpalette((0, 0, 0, 255, 1, 1, 1, 128), "RGBA")
         im.info["transparency"] = 0
         im.apply_transparency()
+        assert im.palette is not None
         assert im.palette.colors == {(0, 0, 0, 0): 0, (1, 1, 1, 128): 1}
 
         # Test that transparency bytes are applied
         with Image.open("Tests/images/pil123p.png") as im:
             assert isinstance(im.info["transparency"], bytes)
+            assert im.palette is not None
             assert im.palette.colors[(27, 35, 6)] == 24
             im.apply_transparency()
+            assert im.palette is not None
             assert im.palette.colors[(27, 35, 6, 214)] == 24
 
     def test_constants(self) -> None:

Tests/test_image_array.py

@@ -113,4 +113,6 @@ def test_fromarray_palette() -> None:
     out = Image.fromarray(a, "P")
 
     # Assert that the Python and C palettes match
+    assert out.palette is not None
+    assert out.im is not None
     assert len(out.palette.colors) == len(out.im.getpalette()) / 3

Tests/test_image_convert.py

@@ -218,6 +218,7 @@ def test_trns_RGB(tmp_path: Path) -> None:
 def test_l_macro_rounding(convert_mode: str) -> None:
     for mode in ("P", "PA"):
         im = Image.new(mode, (1, 1))
+        assert im.palette is not None
         im.palette.getcolor((0, 1, 2))
 
         converted_im = im.convert(convert_mode)

Tests/test_image_filter.py

@@ -137,7 +137,9 @@ def test_builtinfilter_p() -> None:
     builtin_filter = ImageFilter.BuiltinFilter()
 
     with pytest.raises(ValueError):
-        builtin_filter.filter(hopper("P").im)
+        im = hopper("P").im
+        assert im is not None
+        builtin_filter.filter(im)
 
 
 def test_kernel_not_enough_coefficients() -> None:

Tests/test_image_getim.py

@@ -8,4 +8,5 @@ def test_sanity() -> None:
     type_repr = repr(type(im.getim()))
 
     assert "PyCapsule" in type_repr
+    assert im.im is not None
     assert isinstance(im.im.id, int)

Tests/test_image_putpalette.py

@@ -86,6 +86,7 @@ def test_rgba_palette(mode: str, palette: tuple[int, ...]) -> None:
     im = Image.new("P", (1, 1))
     im.putpalette(palette, mode)
     assert im.getpalette() == [1, 2, 3]
+    assert im.palette is not None
     assert im.palette.colors == {(1, 2, 3, 4): 0}
 
 

Tests/test_image_quantize.py

@@ -69,6 +69,7 @@ def test_quantize_no_dither() -> None:
 
     converted = image.quantize(dither=Image.Dither.NONE, palette=palette)
     assert converted.mode == "P"
+    assert converted.palette is not None
     assert converted.palette.palette == palette.palette.palette
 
 
@@ -81,6 +82,7 @@ def test_quantize_no_dither2() -> None:
     palette.putpalette(data)
     quantized = im.quantize(dither=Image.Dither.NONE, palette=palette)
 
+    assert quantized.palette is not None
     assert tuple(quantized.palette.palette) == data
 
     px = quantized.load()
@@ -117,6 +119,7 @@ def test_colors() -> None:
     im = hopper()
     colors = 2
     converted = im.quantize(colors)
+    assert converted.palette is not None
     assert len(converted.palette.palette) == colors * len("RGB")
 
 
@@ -147,6 +150,7 @@ def test_palette(method: Image.Quantize, color: tuple[int, ...]) -> None:
     converted = im.quantize(method=method)
     converted_px = converted.load()
     assert converted_px is not None
+    assert converted.palette is not None
     assert converted_px[0, 0] == converted.palette.colors[color]
 
 

Tests/test_image_resample.py

@@ -27,6 +27,7 @@ class TestImagingResampleVulnerability:
         ):
             with pytest.raises(MemoryError):
                 # any resampling filter will do here
+                assert im.im is not None
                 im.im.resize((xsize, ysize), Image.Resampling.BILINEAR)
 
     def test_invalid_size(self) -> None:

Tests/test_image_resize.py

@@ -27,6 +27,7 @@ class TestImagingCoreResize:
     ) -> Image.Image:
         # Image class independent version of resize.
         im.load()
+        assert im.im is not None
         return im._new(im.im.resize(size, f))
 
     @pytest.mark.parametrize(
@@ -37,6 +38,8 @@ class TestImagingCoreResize:
         r = self.resize(im, (15, 12), Image.Resampling.NEAREST)
         assert r.mode == mode
         assert r.size == (15, 12)
+        assert r.im is not None
+        assert im.im is not None
         assert r.im.bands == im.im.bands
 
     def test_convolution_modes(self) -> None:
@@ -51,6 +54,8 @@ class TestImagingCoreResize:
             r = self.resize(im, (15, 12), Image.Resampling.BILINEAR)
             assert r.mode == mode
             assert r.size == (15, 12)
+            assert r.im is not None
+            assert im.im is not None
             assert r.im.bands == im.im.bands
 
     @pytest.mark.parametrize(

Tests/test_imagemorph.py

@@ -325,6 +325,8 @@ def test_wrong_mode() -> None:
     lut = ImageMorph.LutBuilder(op_name="corner").build_lut()
     imrgb = Image.new("RGB", (10, 10))
     iml = Image.new("L", (10, 10))
+    assert imrgb.im is not None
+    assert iml.im is not None
 
     with pytest.raises(RuntimeError):
         _imagingmorph.apply(bytes(lut), imrgb.im.id, iml.im.id)

Tests/test_imageops_usm.py

@@ -98,10 +98,12 @@ def test_blur_accuracy(test_images: dict[str, ImageFile.ImageFile]) -> None:
         (4, 3, 2),
         (4, 2, 2),
     ]:
+        assert i.im is not None
         assert i.im.getpixel((x, y))[c] >= 250
     # Fuzzy match.
 
     def gp(x: int, y: int) -> tuple[int, ...]:
+        assert i.im is not None
         return i.im.getpixel((x, y))
 
     assert 236 <= gp(7, 4)[0] <= 239

Tests/test_lib_image.py

@@ -7,18 +7,21 @@ from PIL import Image
 
 def test_setmode() -> None:
     im = Image.new("L", (1, 1), 255)
+    assert im.im is not None
     im.im.setmode("1")
     assert im.im.getpixel((0, 0)) == 255
     im.im.setmode("L")
     assert im.im.getpixel((0, 0)) == 255
 
     im = Image.new("1", (1, 1), 1)
+    assert im.im is not None
     im.im.setmode("L")
     assert im.im.getpixel((0, 0)) == 255
     im.im.setmode("1")
     assert im.im.getpixel((0, 0)) == 255
 
     im = Image.new("RGB", (1, 1), (1, 2, 3))
+    assert im.im is not None
     im.im.setmode("RGB")
     assert im.im.getpixel((0, 0)) == (1, 2, 3)
     im.im.setmode("RGBA")

src/PIL/BlpImagePlugin.py

@@ -467,6 +467,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
     magic = b"BLP1" if im.encoderinfo.get("blp_version") == "BLP1" else b"BLP2"
     fp.write(magic)
 
+    assert im.palette is not None
     fp.write(struct.pack("<i", 1))  # Uncompressed or DirectX compression
     fp.write(struct.pack("<b", Encoding.UNCOMPRESSED))
     fp.write(struct.pack("<b", 1 if im.palette.mode == "RGBA" else 0))

src/PIL/BmpImagePlugin.py

@@ -170,6 +170,8 @@ class BmpImageFile(ImageFile.ImageFile):
 
         # ------------------ Special case : header is reported 40, which
         # ---------------------- is shorter than real size for bpp >= 16
+        assert isinstance(file_info["width"], int)
+        assert isinstance(file_info["height"], int)
         self._size = file_info["width"], file_info["height"]
 
         # ------- If color count was not found in the header, compute from bits
@@ -443,6 +445,7 @@ def _save(
     elif im.mode == "L":
         palette = b"".join(o8(i) * 4 for i in range(256))
     elif im.mode == "P":
+        assert im.im is not None
         palette = im.im.getpalette("RGB", "BGRX")
         colors = len(palette) // 4
     else:

src/PIL/EpsImagePlugin.py

@@ -71,7 +71,7 @@ def Ghostscript(
     fp: IO[bytes],
     scale: int = 1,
     transparency: bool = False,
-) -> Image.Image:
+) -> Image.core.ImagingCore:
     """Render an image using Ghostscript"""
     global gs_binary
     if not has_ghostscript():
@@ -161,6 +161,7 @@ def Ghostscript(
         except OSError:
             pass
 
+    assert out_im.im is not None
     im = out_im.im.copy()
     out_im.close()
     return im
@@ -190,7 +191,6 @@ class EpsImageFile(ImageFile.ImageFile):
         self.fp.seek(offset)
 
         self._mode = "RGB"
-        self._size = None
 
         byte_arr = bytearray(255)
         bytes_mv = memoryview(byte_arr)
@@ -228,7 +228,7 @@ class EpsImageFile(ImageFile.ImageFile):
             if k == "BoundingBox":
                 if v == "(atend)":
                     reading_trailer_comments = True
-                elif not self._size or (trailer_reached and reading_trailer_comments):
+                elif not self.tile or (trailer_reached and reading_trailer_comments):
                     try:
                         # Note: The DSC spec says that BoundingBox
                         # fields should be integers, but some drivers
@@ -346,7 +346,7 @@ class EpsImageFile(ImageFile.ImageFile):
                 trailer_reached = True
             bytes_read = 0
 
-        if not self._size:
+        if not self.tile:
             msg = "cannot determine EPS bounding box"
             raise OSError(msg)
 

src/PIL/FpxImagePlugin.py

@@ -81,6 +81,8 @@ class FpxImageFile(ImageFile.ImageFile):
 
         # size (highest resolution)
 
+        assert isinstance(prop[0x1000002], int)
+        assert isinstance(prop[0x1000003], int)
         self._size = prop[0x1000002], prop[0x1000003]
 
         size = max(self.size)

src/PIL/GifImagePlugin.py

@@ -307,6 +307,7 @@ class GifImageFile(ImageFile.ImageFile):
         self.tile = []
 
         if self.dispose:
+            assert self.im is not None
             self.im.paste(self.dispose, self.dispose_extent)
 
         self._frame_palette = palette if palette is not None else self.global_palette
@@ -320,17 +321,21 @@ class GifImageFile(ImageFile.ImageFile):
             else:
                 self._mode = "L"
 
-            if not palette and self.global_palette:
+            if palette:
+                self.palette = palette
+            elif self.global_palette:
                 from copy import copy
 
-                palette = copy(self.global_palette)
+                self.palette = copy(self.global_palette)
-            self.palette = palette
+            else:
+                self.palette = None
         else:
             if self.mode == "P":
                 if (
                     LOADING_STRATEGY != LoadingStrategy.RGB_AFTER_DIFFERENT_PALETTE_ONLY
                     or palette
                 ):
+                    assert self.im is not None
                     if "transparency" in self.info:
                         self.im.putpalettealpha(self.info["transparency"], 0)
                         self.im = self.im.convert("RGBA", Image.Dither.FLOYDSTEINBERG)
@@ -432,6 +437,7 @@ class GifImageFile(ImageFile.ImageFile):
             self._prev_im = self.im
             if self._frame_palette:
                 self.im = Image.core.fill("P", self.size, self._frame_transparency or 0)
+                assert self.im is not None
                 self.im.putpalette("RGB", *self._frame_palette.getdata())
             else:
                 self.im = None
@@ -441,6 +447,7 @@ class GifImageFile(ImageFile.ImageFile):
         super().load_prepare()
 
     def load_end(self) -> None:
+        assert self.im is not None
         if self.__frame == 0:
             if self.mode == "P" and LOADING_STRATEGY == LoadingStrategy.RGB_ALWAYS:
                 if self._frame_transparency is not None:
@@ -495,6 +502,7 @@ def _normalize_mode(im: Image.Image) -> Image.Image:
         return im
     if Image.getmodebase(im.mode) == "RGB":
         im = im.convert("P", palette=Image.Palette.ADAPTIVE)
+        assert im.palette is not None
         if im.palette.mode == "RGBA":
             for rgba in im.palette.colors:
                 if rgba[3] == 0:
@@ -531,16 +539,17 @@ def _normalize_palette(
 
     if im.mode == "P":
         if not source_palette:
+            assert im.im is not None
             source_palette = im.im.getpalette("RGB")[:768]
     else:  # L-mode
         if not source_palette:
             source_palette = bytearray(i // 3 for i in range(768))
         im.palette = ImagePalette.ImagePalette("RGB", palette=source_palette)
+    assert source_palette is not None
 
-    used_palette_colors: list[int] | None
     if palette:
-        used_palette_colors = []
+        used_palette_colors: list[int | None] = []
-        assert source_palette is not None
+        assert im.palette is not None
         for i in range(0, len(source_palette), 3):
             source_color = tuple(source_palette[i : i + 3])
             index = im.palette.colors.get(source_color)
@@ -553,20 +562,25 @@ def _normalize_palette(
                     if j not in used_palette_colors:
                         used_palette_colors[i] = j
                         break
-        im = im.remap_palette(used_palette_colors)
+        dest_map: list[int] = []
+        for index in used_palette_colors:
+            assert index is not None
+            dest_map.append(index)
+        im = im.remap_palette(dest_map)
     else:
-        used_palette_colors = _get_optimize(im, info)
+        optimized_palette_colors = _get_optimize(im, info)
-        if used_palette_colors is not None:
+        if optimized_palette_colors is not None:
-            im = im.remap_palette(used_palette_colors, source_palette)
+            im = im.remap_palette(optimized_palette_colors, source_palette)
             if "transparency" in info:
                 try:
-                    info["transparency"] = used_palette_colors.index(
+                    info["transparency"] = optimized_palette_colors.index(
                         info["transparency"]
                     )
                 except ValueError:
                     del info["transparency"]
             return im
 
+    assert im.palette is not None
     im.palette.palette = source_palette
     return im
 
@@ -578,7 +592,8 @@ def _write_single_frame(
 ) -> None:
     im_out = _normalize_mode(im)
     for k, v in im_out.info.items():
-        im.encoderinfo.setdefault(k, v)
+        if isinstance(k, str):
+            im.encoderinfo.setdefault(k, v)
     im_out = _normalize_palette(im_out, palette, im.encoderinfo)
 
     for s in _get_global_header(im_out, im.encoderinfo):
@@ -630,7 +645,8 @@ def _write_multiple_frames(
                 for k, v in im_frame.info.items():
                     if k == "transparency":
                         continue
-                    im.encoderinfo.setdefault(k, v)
+                    if isinstance(k, str):
+                        im.encoderinfo.setdefault(k, v)
 
             encoderinfo = im.encoderinfo.copy()
             if "transparency" in im_frame.info:
@@ -660,10 +676,12 @@ def _write_multiple_frames(
                         )
                         background = _get_background(im_frame, color)
                         background_im = Image.new("P", im_frame.size, background)
+                        assert im_frames[0].im.palette is not None
                         background_im.putpalette(im_frames[0].im.palette)
                     bbox = _getbbox(background_im, im_frame)[1]
                 elif encoderinfo.get("optimize") and im_frame.mode != "1":
                     if "transparency" not in encoderinfo:
+                        assert im_frame.palette is not None
                         try:
                             encoderinfo["transparency"] = (
                                 im_frame.palette._new_color_index(im_frame)
@@ -901,6 +919,7 @@ def _get_optimize(im: Image.Image, info: dict[str, Any]) -> list[int] | None:
             if optimise or max(used_palette_colors) >= len(used_palette_colors):
                 return used_palette_colors
 
+            assert im.palette is not None
             num_palette_colors = len(im.palette.palette) // Image.getmodebands(
                 im.palette.mode
             )
@@ -950,7 +969,7 @@ def _get_palette_bytes(im: Image.Image) -> bytes:
     :param im: Image object
     :returns: Bytes, len<=768 suitable for inclusion in gif header
     """
-    return im.palette.palette if im.palette else b""
+    return bytes(im.palette.palette) if im.palette else b""
 
 
 def _get_background(
@@ -963,6 +982,7 @@ def _get_background(
             # WebPImagePlugin stores an RGBA value in info["background"]
             # So it must be converted to the same format as GifImagePlugin's
             # info["background"] - a global color table index
+            assert im.palette is not None
             try:
                 background = im.palette.getcolor(info_background, im)
             except ValueError as e:

src/PIL/IcnsImagePlugin.py

@@ -92,6 +92,7 @@ def read_32(
                 msg = f"Error reading channel [{repr(bytesleft)} left]"
                 raise SyntaxError(msg)
             band = Image.frombuffer("L", pixel_size, b"".join(data), "raw", "L", 0, 1)
+            assert im.im is not None
             im.im.putband(band.im, band_ix)
     return {"RGB": im}
 

src/PIL/ImImagePlugin.py

@@ -353,6 +353,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         fp.write(b"Lut: 1\r\n")
     fp.write(b"\000" * (511 - fp.tell()) + b"\032")
     if im.mode in ["P", "PA"]:
+        assert im.im is not None
         im_palette = im.im.getpalette("RGB", "RGB;L")
         colors = len(im_palette) // 3
         palette = b""

src/PIL/Image.py

@@ -532,16 +532,16 @@ class Image:
     format_description: str | None = None
     _close_exclusive_fp_after_loading = True
 
-    def __init__(self):
+    def __init__(self) -> None:
         # FIXME: take "new" parameters / other image?
         # FIXME: turn mode and size into delegating properties?
-        self.im = None
+        self.im: core.ImagingCore | None = None
         self._mode = ""
         self._size = (0, 0)
-        self.palette = None
+        self.palette: ImagePalette.ImagePalette | None = None
-        self.info = {}
+        self.info: dict[str | tuple[int, int], Any] = {}
         self.readonly = 0
-        self._exif = None
+        self._exif: Exif | None = None
 
     @property
     def width(self) -> int:
@@ -617,11 +617,12 @@ class Image:
         # Instead of simply setting to None, we're setting up a
         # deferred error that will better explain that the core image
         # object is gone.
-        self.im = DeferredError(ValueError("Operation on closed image"))
+        self.im = DeferredError(ValueError("Operation on closed image"))  # type: ignore[assignment]
 
     def _copy(self) -> None:
         self.load()
-        self.im = self.im.copy()
+        if self.im:
+            self.im = self.im.copy()
         self.readonly = 0
 
     def _ensure_mutable(self) -> None:
@@ -648,6 +649,7 @@ class Image:
         self.load()
 
         if not format or format == "PPM":
+            assert self.im is not None
             self.im.save_ppm(filename)
         else:
             self.save(filename, format, **options)
@@ -796,6 +798,7 @@ class Image:
 
         # unpack data
         e = _getencoder(self.mode, encoder_name, encoder_args)
+        assert self.im is not None
         e.setimage(self.im)
 
         bufsize = max(65536, self.size[0] * 4)  # see RawEncode.c
@@ -862,6 +865,7 @@ class Image:
 
         # unpack data
         d = _getdecoder(self.mode, decoder_name, decoder_args)
+        assert self.im is not None
         d.setimage(self.im)
         s = d.decode(data)
 
@@ -975,6 +979,7 @@ class Image:
             deprecate(mode, 12)
 
         self.load()
+        assert self.im is not None
 
         has_transparency = "transparency" in self.info
         if not mode and self.mode == "P":
@@ -1045,9 +1050,11 @@ class Image:
                     # use existing conversions
                     trns_im = new(self.mode, (1, 1))
                     if self.mode == "P":
+                        assert self.palette is not None
                         trns_im.putpalette(self.palette)
                         if isinstance(t, tuple):
                             err = "Couldn't allocate a palette color for transparency"
+                            assert trns_im.palette is not None
                             try:
                                 t = trns_im.palette.getcolor(t, self)
                             except ValueError as e:
@@ -1087,6 +1094,7 @@ class Image:
             new_im = self._new(im)
             from . import ImagePalette
 
+            assert new_im.im is not None
             new_im.palette = ImagePalette.ImagePalette(
                 "RGB", new_im.im.getpalette("RGB")
             )
@@ -1149,7 +1157,9 @@ class Image:
         if trns is not None:
             if new_im.mode == "P" and new_im.palette:
                 try:
-                    new_im.info["transparency"] = new_im.palette.getcolor(trns, new_im)
+                    new_im.info["transparency"] = new_im.palette.getcolor(
+                        cast(tuple[int, ...], trns), new_im  # trns was converted to RGB
+                    )
                 except ValueError as e:
                     del new_im.info["transparency"]
                     if str(e) != "cannot allocate more than 256 colors":
@@ -1216,6 +1226,7 @@ class Image:
             )
             raise ValueError(msg)
 
+        assert self.im is not None
         if palette:
             # use palette from reference image
             palette.load()
@@ -1227,6 +1238,7 @@ class Image:
                 raise ValueError(msg)
             im = self.im.convert("P", dither, palette.im)
             new_im = self._new(im)
+            assert palette.palette is not None
             new_im.palette = palette.palette.copy()
             return new_im
 
@@ -1253,6 +1265,7 @@ class Image:
         :returns: An :py:class:`~PIL.Image.Image` object.
         """
         self.load()
+        assert self.im is not None
         return self._new(self.im.copy())
 
     __copy__ = copy
@@ -1281,6 +1294,7 @@ class Image:
             raise ValueError(msg)
 
         self.load()
+        assert self.im is not None
         return self._new(self._crop(self.im, box))
 
     def _crop(
@@ -1334,6 +1348,7 @@ class Image:
         if ymargin is None:
             ymargin = xmargin
         self.load()
+        assert self.im is not None
         return self._new(self.im.expand(xmargin, ymargin))
 
     if TYPE_CHECKING:
@@ -1358,6 +1373,7 @@ class Image:
             raise TypeError(msg)
 
         multiband = isinstance(filter, ImageFilter.MultibandFilter)
+        assert self.im is not None
         if self.im.bands == 1 or multiband:
             return self._new(filter.filter(self.im))
 
@@ -1393,6 +1409,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         return self.im.getbbox(alpha_only)
 
     def getcolors(
@@ -1412,6 +1429,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         if self.mode in ("1", "L", "P"):
             h = self.im.histogram()
             out: list[tuple[int, float]] = [(h[i], i) for i in range(256) if h[i]]
@@ -1439,6 +1457,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         if band is not None:
             return self.im.getband(band)
         return self.im  # could be abused
@@ -1454,6 +1473,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         if self.im.bands > 1:
             return tuple(self.im.getband(i).getextrema() for i in range(self.im.bands))
         return self.im.getextrema()
@@ -1592,6 +1612,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         return self.im.ptr
 
     def getpalette(self, rawmode: str | None = "RGB") -> list[int] | None:
@@ -1608,6 +1629,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         try:
             mode = self.im.getpalettemode()
         except ValueError:
@@ -1628,11 +1650,15 @@ class Image:
 
         :returns: A boolean.
         """
-        return (
+        if (
             self.mode in ("LA", "La", "PA", "RGBA", "RGBa")
-            or (self.mode == "P" and self.palette.mode.endswith("A"))
             or "transparency" in self.info
-        )
+        ):
+            return True
+        if self.mode == "P":
+            assert self.palette is not None
+            return self.palette.mode.endswith("A")
+        return False
 
     def apply_transparency(self) -> None:
         """
@@ -1671,6 +1697,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         return self.im.getpixel(tuple(xy))
 
     def getprojection(self) -> tuple[list[int], list[int]]:
@@ -1682,6 +1709,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         x, y = self.im.getprojection()
         return list(x), list(y)
 
@@ -1709,6 +1737,7 @@ class Image:
         :returns: A list containing pixel counts.
         """
         self.load()
+        assert self.im is not None
         if mask:
             mask.load()
             return self.im.histogram((0, 0), mask.im)
@@ -1737,6 +1766,7 @@ class Image:
         :returns: A float value representing the image entropy
         """
         self.load()
+        assert self.im is not None
         if mask:
             mask.load()
             return self.im.entropy((0, 0), mask.im)
@@ -1815,26 +1845,32 @@ class Image:
                 raise ValueError(msg)
             box += (box[0] + size[0], box[1] + size[1])
 
+        source: core.ImagingCore | str | float | tuple[float, ...]
         if isinstance(im, str):
             from . import ImageColor
 
-            im = ImageColor.getcolor(im, self.mode)
+            source = ImageColor.getcolor(im, self.mode)
-
         elif isImageType(im):
             im.load()
             if self.mode != im.mode:
                 if self.mode != "RGB" or im.mode not in ("LA", "RGBA", "RGBa"):
                     # should use an adapter for this!
                     im = im.convert(self.mode)
-            im = im.im
+            assert im.im is not None
+            source = im.im
+        elif isinstance(im, tuple):
+            source = im
+        else:
+            source = cast(float, im)
 
         self._ensure_mutable()
+        assert self.im is not None
 
         if mask:
             mask.load()
-            self.im.paste(im, box, mask.im)
+            self.im.paste(source, box, mask.im)
         else:
-            self.im.paste(im, box)
+            self.im.paste(source, box)
 
     def alpha_composite(
         self, im: Image, dest: Sequence[int] = (0, 0), source: Sequence[int] = (0, 0)
@@ -1924,6 +1960,7 @@ class Image:
         if isinstance(lut, ImagePointHandler):
             return lut.point(self)
 
+        assert self.im is not None
         if callable(lut):
             # if it isn't a list, it should be a function
             if self.mode in ("I", "I;16", "F"):
@@ -1960,17 +1997,20 @@ class Image:
 
         if self.mode not in ("LA", "PA", "RGBA"):
             # attempt to promote self to a matching alpha mode
+            assert self.im is not None
             try:
                 mode = getmodebase(self.mode) + "A"
                 try:
                     self.im.setmode(mode)
                 except (AttributeError, ValueError) as e:
                     # do things the hard way
+                    assert self.im is not None
                     im = self.im.convert(mode)
                     if im.mode not in ("LA", "PA", "RGBA"):
                         msg = "alpha channel could not be added"
                         raise ValueError(msg) from e  # sanity check
                     self.im = im
+                    assert self.im is not None
                 self._mode = self.im.mode
             except KeyError as e:
                 msg = "illegal image mode"
@@ -1981,6 +2021,7 @@ class Image:
         else:
             band = 3
 
+        assert self.im is not None
         if isImageType(alpha):
             # alpha layer
             if alpha.mode not in ("1", "L"):
@@ -2023,6 +2064,7 @@ class Image:
 
         self._ensure_mutable()
 
+        assert self.im is not None
         self.im.putdata(data, scale, offset)
 
     def putpalette(
@@ -2105,8 +2147,10 @@ class Image:
             if self.mode == "PA":
                 alpha = value[3] if len(value) == 4 else 255
                 value = value[:3]
-            palette_index = self.palette.getcolor(value, self)
+            assert self.palette is not None
+            palette_index = self.palette.getcolor(tuple(value), self)
             value = (palette_index, alpha) if self.mode == "PA" else palette_index
+        assert self.im is not None
         return self.im.putpixel(xy, value)
 
     def remap_palette(
@@ -2133,6 +2177,7 @@ class Image:
         if source_palette is None:
             if self.mode == "P":
                 self.load()
+                assert self.im is not None
                 palette_mode = self.im.getpalettemode()
                 if palette_mode == "RGBA":
                     bands = 4
@@ -2180,6 +2225,7 @@ class Image:
         # m_im.putpalette(mapping_palette, 'L')  # converts to 'P'
         # or just force it.
         # UNDONE -- this is part of the general issue with palettes
+        assert m_im.im is not None
         m_im.im.putpalette(palette_mode, palette_mode + ";L", m_im.palette.tobytes())
 
         m_im = m_im.convert("L")
@@ -2325,6 +2371,7 @@ class Image:
                     (box[3] - reduce_box[1]) / factor_y,
                 )
 
+        assert self.im is not None
         return self._new(self.im.resize(size, resample, box))
 
     def reduce(
@@ -2359,7 +2406,7 @@ class Image:
             return im.convert(self.mode)
 
         self.load()
-
+        assert self.im is not None
         return self._new(self.im.reduce(factor, box))
 
     def rotate(
@@ -2637,6 +2684,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         if self.im.bands == 1:
             return (self.copy(),)
         return tuple(map(self._new, self.im.split()))
@@ -2661,6 +2709,7 @@ class Image:
                 msg = f'The image has no channel "{channel}"'
                 raise ValueError(msg) from e
 
+        assert self.im is not None
         return self._new(self.im.getband(channel))
 
     def tell(self) -> int:
@@ -2765,6 +2814,7 @@ class Image:
 
             self.im = im.im
             self._size = final_size
+            assert self.im is not None
             self._mode = self.im.mode
 
         self.readonly = 0
@@ -2949,6 +2999,7 @@ class Image:
         if image.mode in ("1", "P"):
             resample = Resampling.NEAREST
 
+        assert self.im is not None
         self.im.transform(box, image.im, method, data, resample, fill)
 
     def transpose(self, method: Transpose) -> Image:
@@ -2963,6 +3014,7 @@ class Image:
         """
 
         self.load()
+        assert self.im is not None
         return self._new(self.im.transpose(method))
 
     def effect_spread(self, distance: int) -> Image:
@@ -2972,6 +3024,7 @@ class Image:
         :param distance: Distance to spread pixels.
         """
         self.load()
+        assert self.im is not None
         return self._new(self.im.effect_spread(distance))
 
     def toqimage(self):
@@ -3205,6 +3258,7 @@ def frombuffer(
             if mode == "P":
                 from . import ImagePalette
 
+                assert im.im is not None
                 im.palette = ImagePalette.ImagePalette("RGB", im.im.getpalette("RGB"))
             im.readonly = 1
             return im

src/PIL/ImageChops.py

@@ -48,6 +48,7 @@ def invert(image: Image.Image) -> Image.Image:
     """
 
     image.load()
+    assert image.im is not None
     return image._new(image.im.chop_invert())
 
 
@@ -63,6 +64,7 @@ def lighter(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_lighter(image2.im))
 
 
@@ -78,6 +80,7 @@ def darker(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_darker(image2.im))
 
 
@@ -93,6 +96,7 @@ def difference(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_difference(image2.im))
 
 
@@ -110,6 +114,7 @@ def multiply(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_multiply(image2.im))
 
 
@@ -124,6 +129,7 @@ def screen(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_screen(image2.im))
 
 
@@ -136,6 +142,7 @@ def soft_light(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_soft_light(image2.im))
 
 
@@ -148,6 +155,7 @@ def hard_light(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_hard_light(image2.im))
 
 
@@ -160,6 +168,7 @@ def overlay(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_overlay(image2.im))
 
 
@@ -177,6 +186,7 @@ def add(
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_add(image2.im, scale, offset))
 
 
@@ -194,6 +204,7 @@ def subtract(
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_subtract(image2.im, scale, offset))
 
 
@@ -207,6 +218,7 @@ def add_modulo(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_add_modulo(image2.im))
 
 
@@ -220,6 +232,7 @@ def subtract_modulo(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_subtract_modulo(image2.im))
 
 
@@ -238,6 +251,7 @@ def logical_and(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_and(image2.im))
 
 
@@ -253,6 +267,7 @@ def logical_or(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_or(image2.im))
 
 
@@ -268,6 +283,7 @@ def logical_xor(image1: Image.Image, image2: Image.Image) -> Image.Image:
 
     image1.load()
     image2.load()
+    assert image1.im is not None
     return image1._new(image1.im.chop_xor(image2.im))
 
 
@@ -308,4 +324,5 @@ def offset(image: Image.Image, xoffset: int, yoffset: int | None = None) -> Imag
     if yoffset is None:
         yoffset = xoffset
     image.load()
+    assert image.im is not None
     return image._new(image.im.offset(xoffset, yoffset))

src/PIL/ImageCms.py

@@ -352,6 +352,8 @@ class ImageCmsTransform(Image.ImagePointHandler):
         im.load()
         if imOut is None:
             imOut = Image.new(self.output_mode, im.size, None)
+        assert im.im is not None
+        assert imOut.im is not None
         self.transform.apply(im.im.id, imOut.im.id)
         imOut.info["icc_profile"] = self.output_profile.tobytes()
         return imOut
@@ -361,6 +363,7 @@ class ImageCmsTransform(Image.ImagePointHandler):
         if im.mode != self.output_mode:
             msg = "mode mismatch"
             raise ValueError(msg)  # wrong output mode
+        assert im.im is not None
         self.transform.apply(im.im.id, im.im.id)
         im.info["icc_profile"] = self.output_profile.tobytes()
         return im

src/PIL/ImageDraw.py

@@ -32,7 +32,6 @@
 from __future__ import annotations
 
 import math
-import numbers
 import struct
 from collections.abc import Sequence
 from types import ModuleType
@@ -160,13 +159,13 @@ class ImageDraw:
             if ink is not None:
                 if isinstance(ink, str):
                     ink = ImageColor.getcolor(ink, self.mode)
-                if self.palette and not isinstance(ink, numbers.Number):
+                if self.palette and isinstance(ink, tuple):
                     ink = self.palette.getcolor(ink, self._image)
                 result_ink = self.draw.draw_ink(ink)
             if fill is not None:
                 if isinstance(fill, str):
                     fill = ImageColor.getcolor(fill, self.mode)
-                if self.palette and not isinstance(fill, numbers.Number):
+                if self.palette and isinstance(fill, tuple):
                     fill = self.palette.getcolor(fill, self._image)
                 result_fill = self.draw.draw_ink(fill)
         return result_ink, result_fill

src/PIL/ImageFile.py

@@ -475,6 +475,7 @@ class Parser:
                     d, e, o, a = im.tile[0]
                     im.tile = []
                     self.decoder = Image._getdecoder(im.mode, d, a, im.decoderconfig)
+                    assert im.im is not None
                     self.decoder.setimage(im.im, e)
 
                     # calculate decoder offset
@@ -566,6 +567,7 @@ def _encode_tile(
             fp.seek(offset)
         encoder = Image._getencoder(im.mode, encoder_name, args, im.encoderconfig)
         try:
+            assert im.im is not None
             encoder.setimage(im.im, extents)
             if encoder.pushes_fd:
                 encoder.setfd(fp)

src/PIL/ImageFont.py

@@ -142,6 +142,7 @@ class ImageFont:
             raise TypeError(msg)
 
         image.load()
+        assert image.im is not None
 
         self.font = Image.core.font(image.im, data)
 

src/PIL/ImageMath.py

@@ -65,6 +65,8 @@ class _Operand:
             except AttributeError as e:
                 msg = f"bad operand type for '{op}'"
                 raise TypeError(msg) from e
+            assert out.im is not None
+            assert im_1.im is not None
             _imagingmath.unop(op, out.im.id, im_1.im.id)
         else:
             # binary operation
@@ -93,6 +95,9 @@ class _Operand:
             except AttributeError as e:
                 msg = f"bad operand type for '{op}'"
                 raise TypeError(msg) from e
+            assert out.im is not None
+            assert im_1.im is not None
+            assert im_2.im is not None
             _imagingmath.binop(op, out.im.id, im_1.im.id, im_2.im.id)
         return _Operand(out)
 

src/PIL/ImageMorph.py

@@ -213,6 +213,8 @@ class MorphOp:
             msg = "Image mode must be L"
             raise ValueError(msg)
         outimage = Image.new(image.mode, image.size, None)
+        assert image.im is not None
+        assert outimage.im is not None
         count = _imagingmorph.apply(bytes(self.lut), image.im.id, outimage.im.id)
         return count, outimage
 
@@ -229,6 +231,7 @@ class MorphOp:
         if image.mode != "L":
             msg = "Image mode must be L"
             raise ValueError(msg)
+        assert image.im is not None
         return _imagingmorph.match(bytes(self.lut), image.im.id)
 
     def get_on_pixels(self, image: Image.Image) -> list[tuple[int, int]]:
@@ -240,6 +243,7 @@ class MorphOp:
         if image.mode != "L":
             msg = "Image mode must be L"
             raise ValueError(msg)
+        assert image.im is not None
         return _imagingmorph.get_on_pixels(image.im.id)
 
     def load_lut(self, filename: str) -> None:

src/PIL/ImageTk.py

@@ -43,6 +43,7 @@ def _pilbitmap_check() -> int:
     if _pilbitmap_ok is None:
         try:
             im = Image.new("1", (1, 1))
+            assert im.im is not None
             tkinter.BitmapImage(data=f"PIL:{im.im.id}")
             _pilbitmap_ok = 1
         except tkinter.TclError:
@@ -127,10 +128,7 @@ class PhotoImage:
                 # palette mapped data
                 image.apply_transparency()
                 image.load()
-                try:
+                mode = image.palette.mode if image.palette else "RGB"
-                    mode = image.palette.mode
-                except AttributeError:
-                    mode = "RGB"  # default
             size = image.size
             kw["width"], kw["height"] = size
 
@@ -190,6 +188,7 @@ class PhotoImage:
         # convert to blittable
         im.load()
         image = im.im
+        assert image is not None
         if image.isblock() and im.mode == self.__mode:
             block = image
         else:
@@ -231,6 +230,7 @@ class BitmapImage:
         if _pilbitmap_check():
             # fast way (requires the pilbitmap booster patch)
             image.load()
+            assert image.im is not None
             kw["data"] = f"PIL:{image.im.id}"
             self.__im = image  # must keep a reference
         else:
@@ -277,6 +277,7 @@ def getimage(photo: PhotoImage) -> Image.Image:
     """Copies the contents of a PhotoImage to a PIL image memory."""
     im = Image.new("RGBA", (photo.width(), photo.height()))
     block = im.im
+    assert block is not None
 
     _pyimagingtkcall("PyImagingPhotoGet", photo, block.id)
 

src/PIL/IptcImagePlugin.py

@@ -199,9 +199,13 @@ def getiptcinfo(
 
     data = None
 
+    info: dict[tuple[int, int], bytes | list[bytes]] = {}
     if isinstance(im, IptcImageFile):
         # return info dictionary right away
-        return im.info
+        for k, v in im.info.items():
+            if isinstance(k, tuple):
+                info[k] = v
+        return info
 
     elif isinstance(im, JpegImagePlugin.JpegImageFile):
         # extract the IPTC/NAA resource
@@ -237,4 +241,7 @@ def getiptcinfo(
     except (IndexError, KeyError):
         pass  # expected failure
 
-    return iptc_im.info
+    for k, v in iptc_im.info.items():
+        if isinstance(k, tuple):
+            info[k] = v
+    return info

src/PIL/JpegImagePlugin.py

@@ -473,6 +473,7 @@ class JpegImageFile(ImageFile.ImageFile):
             except OSError:
                 pass
 
+        assert self.im is not None
         self._mode = self.im.mode
         self._size = self.im.size
 

src/PIL/PalmImagePlugin.py

@@ -173,6 +173,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
 
     flags = 0
     if im.mode == "P" and "custom-colormap" in im.info:
+        assert im.palette is not None
         flags = flags & _FLAGS["custom-colormap"]
         colormapsize = 4 * 256 + 2
         colormapmode = im.palette.mode

src/PIL/PcdImagePlugin.py

@@ -55,6 +55,7 @@ class PcdImageFile(ImageFile.ImageFile):
             assert self.im is not None
 
             self.im = self.im.rotate(self.tile_post_rotate)
+            assert self.im is not None
             self._size = self.im.size
 
 

src/PIL/PngImagePlugin.py

@@ -863,6 +863,7 @@ class PngImageFile(ImageFile.ImageFile):
         assert self.png is not None
 
         self.dispose: _imaging.ImagingCore | None
+        dispose_extent = None
         if frame == 0:
             if rewind:
                 self._fp.seek(self.__rewind)
@@ -877,7 +878,7 @@ class PngImageFile(ImageFile.ImageFile):
             self.default_image = self.info.get("default_image", False)
             self.dispose_op = self.info.get("disposal")
             self.blend_op = self.info.get("blend")
-            self.dispose_extent = self.info.get("bbox")
+            dispose_extent = self.info.get("bbox")
             self.__frame = 0
         else:
             if frame != self.__frame + 1:
@@ -886,6 +887,7 @@ class PngImageFile(ImageFile.ImageFile):
 
             # ensure previous frame was loaded
             self.load()
+            assert self.im is not None
 
             if self.dispose:
                 self.im.paste(self.dispose, self.dispose_extent)
@@ -935,11 +937,13 @@ class PngImageFile(ImageFile.ImageFile):
             self.tile = self.png.im_tile
             self.dispose_op = self.info.get("disposal")
             self.blend_op = self.info.get("blend")
-            self.dispose_extent = self.info.get("bbox")
+            dispose_extent = self.info.get("bbox")
 
             if not self.tile:
                 msg = "image not found in APNG frame"
                 raise EOFError(msg)
+        if dispose_extent:
+            self.dispose_extent: tuple[float, float, float, float] = dispose_extent
 
         # setup frame disposal (actual disposal done when needed in the next _seek())
         if self._prev_im is None and self.dispose_op == Disposal.OP_PREVIOUS:
@@ -1046,6 +1050,7 @@ class PngImageFile(ImageFile.ImageFile):
             self.png = None
         else:
             if self._prev_im and self.blend_op == Blend.OP_OVER:
+                assert self.im is not None
                 updated = self._crop(self.im, self.dispose_extent)
                 if self.im.mode == "RGB" and "transparency" in self.info:
                     mask = updated.convert_transparent(
@@ -1400,6 +1405,7 @@ def _save(
                     chunk(fp, cid, data)
 
     if im.mode == "P":
+        assert im.im is not None
         palette_byte_number = colors * 3
         palette_bytes = im.im.getpalette("RGB")[:palette_byte_number]
         while len(palette_bytes) < palette_byte_number:
@@ -1430,8 +1436,9 @@ def _save(
                 # and it's in the info dict. It's probably just stale.
                 msg = "cannot use transparency for this mode"
                 raise OSError(msg)
-    else:
+    elif im.mode == "P":
-        if im.mode == "P" and im.im.getpalettemode() == "RGBA":
+        assert im.im is not None
+        if im.im.getpalettemode() == "RGBA":
             alpha = im.im.getpalette("RGBA", "A")
             alpha_bytes = colors
             chunk(fp, b"tRNS", alpha[:alpha_bytes])

src/PIL/QoiImagePlugin.py

@@ -26,7 +26,7 @@ class QoiImageFile(ImageFile.ImageFile):
             msg = "not a QOI file"
             raise SyntaxError(msg)
 
-        self._size = tuple(i32(self.fp.read(4)) for i in range(2))
+        self._size = i32(self.fp.read(4)), i32(self.fp.read(4))
 
         channels = self.fp.read(1)[0]
         self._mode = "RGB" if channels == 3 else "RGBA"

src/PIL/TiffImagePlugin.py

@@ -1313,6 +1313,7 @@ class TiffImageFile(ImageFile.ImageFile):
         decoder = Image._getdecoder(
             self.mode, "libtiff", tuple(args), self.decoderconfig
         )
+        assert self.im is not None
         try:
             decoder.setimage(self.im, extents)
         except ValueError as e: