Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/greenlet/tests/fail_switch_three_greenlets2.py

@@ -0,0 +1,55 @@
+"""
+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)