CC-5227 - Sometimes Liquidsoap telnet is unresponsive which causes all Pypo threads to block

-initial commit

python_apps/pypo/timeout.py

@@ -0,0 +1,38 @@
+import threading
+import logging
+
+def __timeout(func, timeout_duration, default, args, kwargs):
+
+    class InterruptableThread(threading.Thread):
+        def __init__(self):
+            threading.Thread.__init__(self)
+            self.result = default
+        def run(self):
+            self.result = func(*args, **kwargs)
+
+    first_attempt = True
+
+    while True:
+        it = InterruptableThread()
+        it.start()
+        it.join(timeout_duration)
+
+        logger = logging.getLogger()
+
+        if it.isAlive():
+            """Restart Liquidsoap and try the command one more time. If it 
+            fails again then there is something critically wrong..."""
+            if first_attempt:
+                #restart liquidsoap
+                pass
+            else:
+                raise Exception("Thread did not terminate")
+        else:
+            return it.result
+
+        first_attempt = False
+
+def ls_timeout(f, timeout=4, default=None):
+    def new_f(*args, **kwargs):
+        return __timeout(f, timeout, default, args, kwargs)
+    return new_f