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Clearer signal handling #16330

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Merged
merged 1 commit into from
Jan 28, 2020
Merged

Clearer signal handling #16330

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5 changes: 3 additions & 2 deletions lib/matplotlib/backends/backend_qt5.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1034,11 +1034,12 @@ def trigger_manager_draw(manager):
def mainloop():
old_signal = signal.getsignal(signal.SIGINT)
# allow SIGINT exceptions to close the plot window.
if old_signal:
is_python_signal_handler = old_signal is not None
if is_python_signal_handler:
signal.signal(signal.SIGINT, signal.SIG_DFL)
try:
qApp.exec_()
finally:
# reset the SIGINT exception handler
if old_signal:
if is_python_signal_handler:
signal.signal(signal.SIGINT, old_signal)