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Backport PR #17705 on branch v3.3.x (Keep cachedRenderer as None when pickling Figure.) #17717

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Merged
merged 1 commit into from
Jun 22, 2020
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Backport PR #17705 on branch v3.3.x (Keep cachedRenderer as None when pickling Figure.) #17717

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6 changes: 4 additions & 2 deletions lib/matplotlib/figure.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2108,8 +2108,10 @@ def __getstate__(self):
# The canvas cannot currently be pickled, but this has the benefit
# of meaning that a figure can be detached from one canvas, and
# re-attached to another.
for attr_to_pop in ('canvas', '_cachedRenderer'):
state.pop(attr_to_pop, None)
state.pop("canvas")

# Set cached renderer to None -- it can't be pickled.
state["_cachedRenderer"] = None

# add version information to the state
state['__mpl_version__'] = _mpl_version
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