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EDIT :: fail_switch_three_greenlets2.py

""" Like fail_switch_three_greenlets, but the call into g1_run would actually be valid. """ import greenlet g1 = None g2 = None switch_to_g2 = True results = [] def tracefunc(*args): results.append(('trace', args[0])) print('TRACE', *args) global switch_to_g2 if switch_to_g2: switch_to_g2 = False g2.switch('g2 from tracefunc') print('\tLEAVE TRACE', *args) def g1_run(arg): results.append(('g1 arg', arg)) print('In g1_run') from_parent = greenlet.getcurrent().parent.switch('from g1_run') results.append(('g1 from parent', from_parent)) return 'g1 done' def g2_run(arg): #g1.switch() results.append(('g2 arg', arg)) parent = greenlet.getcurrent().parent.switch('from g2_run') global switch_to_g2 switch_to_g2 = False results.append(('g2 from parent', parent)) return 'g2 done' greenlet.settrace(tracefunc) g1 = greenlet.greenlet(g1_run) g2 = greenlet.greenlet(g2_run) x = g1.switch('g1 from main') results.append(('main g1', x)) print('Back in main', x) x = g1.switch('g2 from main') results.append(('main g2', x)) print('back in amain again', x) x = g1.switch('g1 from main 2') results.append(('main g1.2', x)) x = g2.switch() results.append(('main g2.2', x)) print("RESULTS:", results)

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