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BUG: Fix f_back is None handling #20965

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Merged
merged 1 commit into from
Sep 1, 2021
Merged

BUG: Fix f_back is None handling #20965

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3 changes: 2 additions & 1 deletion lib/matplotlib/backends/backend_qt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -333,7 +333,8 @@ def keyReleaseEvent(self, event):

def resizeEvent(self, event):
frame = sys._getframe()
if frame.f_code is frame.f_back.f_code: # Prevent PyQt6 recursion.
# Prevent PyQt6 recursion, but sometimes frame.f_back is None
if frame.f_code is getattr(frame.f_back, 'f_code', None):
return
w = event.size().width() * self.device_pixel_ratio
h = event.size().height() * self.device_pixel_ratio
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