Added type hints

Tests/test_file_gif.py

@@ -353,7 +353,7 @@ def test_palette_434(tmp_path: Path) -> None:
 
     def roundtrip(im: Image.Image, **kwargs: bool) -> Image.Image:
         out = str(tmp_path / "temp.gif")
-        im.copy().save(out, **kwargs)
+        im.copy().save(out, "GIF", **kwargs)
         reloaded = Image.open(out)
 
         return reloaded

Tests/test_file_libtiff.py

@@ -92,11 +92,22 @@ class TestFileLibTiff(LibTiffTestCase):
     def test_g4_non_disk_file_object(self, tmp_path: Path) -> None:
         """Testing loading from non-disk non-BytesIO file object"""
         test_file = "Tests/images/hopper_g4_500.tif"
-        s = io.BytesIO()
         with open(test_file, "rb") as f:
-            s.write(f.read())
-            s.seek(0)
-        r = io.BufferedReader(s)
+            data = f.read()
+
+        class NonBytesIO(io.RawIOBase):
+            def read(self, size: int = -1) -> bytes:
+                nonlocal data
+                if size == -1:
+                    size = len(data)
+                result = data[:size]
+                data = data[size:]
+                return result
+
+            def readable(self) -> bool:
+                return True
+
+        r = io.BufferedReader(NonBytesIO())
         with Image.open(r) as im:
             assert im.size == (500, 500)
             self._assert_noerr(tmp_path, im)
@@ -1139,7 +1150,7 @@ class TestFileLibTiff(LibTiffTestCase):
             arguments: dict[str, str | int] = {"compression": "tiff_adobe_deflate"}
             if argument:
                 arguments["strip_size"] = 2**18
-            im.save(out, **arguments)
+            im.save(out, "TIFF", **arguments)
 
             with Image.open(out) as im:
                 assert isinstance(im, TiffImagePlugin.TiffImageFile)

Tests/test_file_pdf.py

@@ -118,7 +118,7 @@ def test_dpi(params: dict[str, int | tuple[int, int]], tmp_path: Path) -> None:
     im = hopper()
 
     outfile = str(tmp_path / "temp.pdf")
-    im.save(outfile, **params)
+    im.save(outfile, "PDF", **params)
 
     with open(outfile, "rb") as fp:
         contents = fp.read()

Tests/test_file_tiff.py

@@ -78,6 +78,7 @@ class TestFileTiff:
 
     def test_seek_after_close(self) -> None:
         im = Image.open("Tests/images/multipage.tiff")
+        assert isinstance(im, TiffImagePlugin.TiffImageFile)
         im.close()
 
         with pytest.raises(ValueError):
@@ -424,13 +425,13 @@ class TestFileTiff:
     def test_load_float(self) -> None:
         ifd = TiffImagePlugin.ImageFileDirectory_v2()
         data = b"abcdabcd"
-        ret = ifd.load_float(data, False)
+        ret = getattr(ifd, "load_float")(data, False)
         assert ret == (1.6777999408082104e22, 1.6777999408082104e22)
 
     def test_load_double(self) -> None:
         ifd = TiffImagePlugin.ImageFileDirectory_v2()
         data = b"abcdefghabcdefgh"
-        ret = ifd.load_double(data, False)
+        ret = getattr(ifd, "load_double")(data, False)
         assert ret == (8.540883223036124e194, 8.540883223036124e194)
 
     def test_ifd_tag_type(self) -> None:
@@ -599,7 +600,7 @@ class TestFileTiff:
     def test_with_underscores(self, tmp_path: Path) -> None:
         kwargs = {"resolution_unit": "inch", "x_resolution": 72, "y_resolution": 36}
         filename = str(tmp_path / "temp.tif")
-        hopper("RGB").save(filename, **kwargs)
+        hopper("RGB").save(filename, "TIFF", **kwargs)
         with Image.open(filename) as im:
             # legacy interface
             assert im.tag[X_RESOLUTION][0][0] == 72
@@ -624,14 +625,17 @@ class TestFileTiff:
     def test_iptc(self, tmp_path: Path) -> None:
         # Do not preserve IPTC_NAA_CHUNK by default if type is LONG
         outfile = str(tmp_path / "temp.tif")
-        im = hopper()
-        ifd = TiffImagePlugin.ImageFileDirectory_v2()
-        ifd[33723] = 1
-        ifd.tagtype[33723] = 4
-        im.tag_v2 = ifd
-        im.save(outfile)
+        with Image.open("Tests/images/hopper.tif") as im:
+            im.load()
+            assert isinstance(im, TiffImagePlugin.TiffImageFile)
+            ifd = TiffImagePlugin.ImageFileDirectory_v2()
+            ifd[33723] = 1
+            ifd.tagtype[33723] = 4
+            im.tag_v2 = ifd
+            im.save(outfile)
 
         with Image.open(outfile) as im:
+            assert isinstance(im, TiffImagePlugin.TiffImageFile)
             assert 33723 not in im.tag_v2
 
     def test_rowsperstrip(self, tmp_path: Path) -> None:

Tests/test_image.py

@@ -704,7 +704,7 @@ class TestImage:
             else:
                 assert new_image.palette is None
 
-        _make_new(im, im_p, ImagePalette.ImagePalette(list(range(256)) * 3))
+        _make_new(im, im_p, ImagePalette.ImagePalette("RGB"))
         _make_new(im_p, im, None)
         _make_new(im, blank_p, ImagePalette.ImagePalette())
         _make_new(im, blank_pa, ImagePalette.ImagePalette())

Tests/test_imagegrab.py

@@ -60,6 +60,8 @@ class TestImageGrab:
     def test_grabclipboard(self) -> None:
         if sys.platform == "darwin":
             subprocess.call(["screencapture", "-cx"])
+
+            ImageGrab.grabclipboard()
         elif sys.platform == "win32":
             p = subprocess.Popen(["powershell", "-command", "-"], stdin=subprocess.PIPE)
             p.stdin.write(
@@ -69,6 +71,8 @@ $bmp = New-Object Drawing.Bitmap 200, 200
 [Windows.Forms.Clipboard]::SetImage($bmp)"""
             )
             p.communicate()
+
+            ImageGrab.grabclipboard()
         else:
             if not shutil.which("wl-paste") and not shutil.which("xclip"):
                 with pytest.raises(
@@ -77,9 +81,6 @@ $bmp = New-Object Drawing.Bitmap 200, 200
                     r" ImageGrab.grabclipboard\(\) on Linux",
                 ):
                     ImageGrab.grabclipboard()
-            return
-
-        ImageGrab.grabclipboard()
 
     @pytest.mark.skipif(sys.platform != "win32", reason="Windows only")
     def test_grabclipboard_file(self) -> None:

pyproject.toml

@@ -155,3 +155,11 @@ follow_imports = "silent"
 warn_redundant_casts = true
 warn_unreachable = true
 warn_unused_ignores = true
+exclude = [
+  '^Tests/oss-fuzz/fuzz_font.py$',
+  '^Tests/oss-fuzz/fuzz_pillow.py$',
+  '^Tests/test_qt_image_qapplication.py$',
+  '^Tests/test_font_pcf_charsets.py$',
+  '^Tests/test_font_pcf.py$',
+  '^Tests/test_file_tar.py$',
+]

src/PIL/Image.py

@@ -1886,7 +1886,7 @@ class Image:
 
     def point(
         self,
-        lut: Sequence[float] | Callable[[int], float] | ImagePointHandler,
+        lut: Sequence[float] | NumpyArray | Callable[[int], float] | ImagePointHandler,
         mode: str | None = None,
     ) -> Image:
         """
@@ -1996,7 +1996,7 @@ class Image:
 
     def putdata(
         self,
-        data: Sequence[float] | Sequence[Sequence[int]],
+        data: Sequence[float] | Sequence[Sequence[int]] | NumpyArray,
         scale: float = 1.0,
         offset: float = 0.0,
     ) -> None:

tox.ini

@@ -38,9 +38,11 @@ deps =
     ipython
     numpy
     packaging
+    pytest
     types-defusedxml
     types-olefile
+    types-setuptools
 extras =
     typing
 commands =
-    mypy src {posargs}
+    mypy src Tests {posargs}