Add pyupgrade to pre-commit hooks

.pre-commit-config.yaml

@@ -14,6 +14,14 @@ repos:
       - id: check-added-large-files
         args: ['--maxkb=1000']
 
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.21.2
+    hooks:
+    -   id: pyupgrade
+        args: [--py310-plus]
+        files: ^(test|src)/
+        exclude: ^examples/
+
   - repo: https://github.com/omnilib/ufmt
     rev: v2.6.0
     hooks:

src/torchcodec/_frame.py

@@ -6,8 +6,8 @@
 
 
 import dataclasses
+from collections.abc import Iterable, Iterator
 from dataclasses import dataclass
-from typing import Iterable, Iterator
 
 from torch import Tensor
 

src/torchcodec/decoders/_decoder_utils.py

@@ -7,11 +7,11 @@
 
 import contextvars
 import io
+
+from collections.abc import Generator
 from contextlib import contextmanager
 from pathlib import Path
 
-from typing import Generator
-
 from torch import Tensor
 from torchcodec import _core as core
 

src/torchcodec/decoders/_video_decoder.py

@@ -8,8 +8,9 @@
 import io
 import json
 import numbers
+from collections.abc import Sequence
 from pathlib import Path
-from typing import Literal, Sequence
+from typing import Literal
 
 import torch
 from torch import device as torch_device, nn, Tensor

src/torchcodec/samplers/_common.py

@@ -1,4 +1,4 @@
-from typing import Callable
+from collections.abc import Callable
 
 from torchcodec import FrameBatch
 

src/torchcodec/transforms/_decoder_transforms.py

@@ -6,8 +6,8 @@
 
 
 from abc import ABC, abstractmethod
+from collections.abc import Sequence
 from types import ModuleType
-from typing import Sequence
 
 import torch
 from torch import nn

test/test_decoders.py

@@ -127,7 +127,7 @@ def test_create_fails(self, Decoder):
         # user mistakenly forgets to specify binary reading when creating a file
         # like object from open()
         with pytest.raises(TypeError, match="binary reading?"):
-            Decoder(open(NASA_VIDEO.path, "r"))
+            Decoder(open(NASA_VIDEO.path))
 
 
 class TestVideoDecoder:
@@ -1334,7 +1334,7 @@ def test_custom_frame_mappings_json_and_bytes(
         # Optionally open the custom frame mappings file if it is a file path
         # or use a null context if it is a string.
         with (
-            open(custom_frame_mappings, "r")
+            open(custom_frame_mappings)
             if hasattr(custom_frame_mappings, "read")
             else contextlib.nullcontext()
         ) as custom_frame_mappings:
@@ -1406,7 +1406,7 @@ def test_custom_frame_mappings_init_fails_invalid_json(self, tmp_path, device):
             f.write("invalid input")
 
         # Test both file object and string
-        with open(invalid_json_path, "r") as file_obj:
+        with open(invalid_json_path) as file_obj:
             for custom_frame_mappings in [
                 file_obj,
                 file_obj.read(),

test/test_ops.py

@@ -1005,7 +1005,7 @@ def seek(self, offset: int, whence: int) -> int:
 
         class SeekMethodMissing:
             def read(self, size: int) -> bytes:
-                return bytes()
+                return b""
 
         with pytest.raises(RuntimeError, match="must implement a seek method"):
             create_from_file_like(SeekMethodMissing(), "approximate")
@@ -1016,7 +1016,7 @@ def __init__(self, file: io.RawIOBase):
 
             # io.RawIOBase says we should accept a single int; wrong signature on purpose
             def read(self) -> bytes:
-                return bytes()
+                return b""
 
             def seek(self, offset: int, whence: int) -> int:
                 return self._file.seeK(offset, whence)

test/utils.py

@@ -262,7 +262,7 @@ def __post_init__(self):
                     "You need to submit this file, or specify the `frames` field manually."
                 )
 
-            with open(frames_info_path, "r") as f:
+            with open(frames_info_path) as f:
                 frames_info = json.loads(f.read())
             self.frames[stream_index] = {
                 frame_index: TestFrameInfo(