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Use @cached_property

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This commit is contained in:
Andrew Murray 2024-05-22 19:43:00 +10:00
parent d879f39711
commit 33e304ed66
1 changed files with 18 additions and 19 deletions
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37
src/PIL/GifImagePlugin.py
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@ -30,6 +30,7 @@ import math
import os import os
import subprocess import subprocess
from enum import IntEnum from enum import IntEnum
from functools import cached_property
from . import ( from . import (
Image, Image,
@ -112,8 +113,7 @@ class GifImageFile(ImageFile.ImageFile):
self._fp = self.fp # FIXME: hack self._fp = self.fp # FIXME: hack
self.__rewind = self.fp.tell() self.__rewind = self.fp.tell()
self._n_frames = None self._n_frames: int | None = None
self._is_animated = None
self._seek(0) # get ready to read first frame self._seek(0) # get ready to read first frame
@property @property
@ -128,24 +128,23 @@ class GifImageFile(ImageFile.ImageFile):
self.seek(current) self.seek(current)
return self._n_frames return self._n_frames
@property @cached_property
def is_animated(self): def is_animated(self) -> bool:
if self._is_animated is None: if self._n_frames is not None:
if self._n_frames is not None: return self._n_frames != 1
self._is_animated = self._n_frames != 1
else:
current = self.tell()
if current:
self._is_animated = True
else:
try:
self._seek(1, False)
self._is_animated = True
except EOFError:
self._is_animated = False
self.seek(current) current = self.tell()
return self._is_animated if current:
return True
try:
self._seek(1, False)
is_animated = True
except EOFError:
is_animated = False
self.seek(current)
return is_animated
def seek(self, frame: int) -> None: def seek(self, frame: int) -> None:
if not self._seek_check(frame): if not self._seek_check(frame):