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Better exception handling for both event loop and for when processes exit

This commit is contained in:
PySimpleGUI 2022-05-05 15:49:01 -04:00
parent 8fab8d124e
commit 51f0bbd7a3
1 changed files with 40 additions and 28 deletions
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16
DemoPrograms/Demo_Desktop_Widget_CPU_Top_Processes.py
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@ -42,8 +42,10 @@ def main():
# start cpu measurement thread
# using the PySimpleGUI call to start and manage the thread
window.perform_long_operation(lambda: CPU_thread(window), '-THREAD FINISHED-')
window.start_thread(lambda: CPU_thread(window), '-THREAD FINISHED-')
g_interval = 1
# Unusual construct of a Try around entire event loop... something is crashing, we need to find out what...
try:
# ---------------- main loop ----------------
while True:
# --------- Read and update window --------
@ -61,7 +63,14 @@ def main():
cpu_percent, procs = values[event] # the thread sends a tuple
if procs:
# --------- Create dictionary of top % CPU processes. Format is name:cpu_percent --------
top = {proc.name(): proc.cpu_percent() for proc in procs}
top = {}
for proc in procs:
try:
top[proc.name()] = proc.cpu_percent()
except Exception as e:
pass # it's OK to get an exception here because processes come and go... one may have gone...
# sg.Print('*** GOT Exception looping through procs ***', c='white on red', font='_ 18')
# sg.Print('Exception = ', e, 'procs=', procs, 'proc', proc)
top_sorted = sorted(top.items(), key=operator.itemgetter(1), reverse=True) # reverse sort to get highest CPU usage on top
if top_sorted:
@ -72,6 +81,9 @@ def main():
window['-PROCESSES-'].update(display_string)
# get the timeout from the spinner
g_interval = int(values['-SPIN-'])
except Exception as e:
sg.Print('*** GOT Exception in event loop ***', c='white on red', font='_ 18')
sg.Print('Exception = ', e, wait=True) # IMPORTANT to add a wait/blocking so that the print pauses execution. Otherwise program continue and exits
window.close()