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| author | Takeshi KOMIYA <i.tkomiya@gmail.com> | 2020-04-19 10:50:40 +0300 |
|---|---|---|
| committer | Takeshi KOMIYA <i.tkomiya@gmail.com> | 2020-04-19 10:56:40 +0300 |
| commit | a24ef1f0cc4ebc29871289b5b92d76f4fe7b7e80 (patch) | |
| tree | 4d8ba32769224823724f547289561d8be4ccf922 /sphinx/util/png.py | |
| parent | 5c14375365fe9a9f7b97cc37988d17a8a3ec56d2 (diff) | |
refactor: Add Optional to type annotations
Diffstat (limited to 'sphinx/util/png.py')
| -rw-r--r-- | sphinx/util/png.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sphinx/util/png.py b/sphinx/util/png.py index c7f73fd50..22c35d991 100644 --- a/sphinx/util/png.py +++ b/sphinx/util/png.py @@ -10,6 +10,7 @@ import binascii import struct +from typing import Optional LEN_IEND = 12 @@ -20,7 +21,7 @@ DEPTH_CHUNK_START = b'tEXtDepth\x00' IEND_CHUNK = b'\x00\x00\x00\x00IEND\xAE\x42\x60\x82' -def read_png_depth(filename: str) -> int: +def read_png_depth(filename: str) -> Optional[int]: """Read the special tEXt chunk indicating the depth from a PNG file.""" with open(filename, 'rb') as f: f.seek(- (LEN_IEND + LEN_DEPTH), 2) |