Use collections.deque to store animation cache data. #30206
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QuLogic
requested changes
Jun 23, 2025
lib/matplotlib/animation.py
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| super().__init__(fig, **kwargs) | ||
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| # Need to reset the saved seq, since right now it will contain data | ||
| # for a single frame from init, which is not what we want. | ||
| self._save_seq = [] | ||
| self._save_seq = collections.deque([], self._save_count) |
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Can't just clear it?
Suggested change
| self._save_seq = collections.deque([], self._save_count) | |
| self._save_seq.clear() |
deques are exactly suited for the task at hand, and should be (here, marginally) more efficient than repeatedly slicing off the start of the list. Also drop unneeded reference to old_frame_seq (the iterator already keeps that data alive).
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thanks, fixed |
QuLogic
approved these changes
Jun 23, 2025
jkseppan
approved these changes
Jun 24, 2025
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deques are exactly suited for the task at hand, and should be (here, marginally) more efficient than repeatedly slicing off the start of the list.
Also drop unneeded reference to old_frame_seq (the iterator already keeps that data alive).
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