Taiiwo · October 8, 2019 16:02 · Oct 8, 2019
diff --git a/halt.py b/halt.py
@@ -0,0 +1,32 @@
+import asyncio
+
+loop = asyncio.get_event_loop()
+
+# returns true if coroutine function blocks or errors, else false
+async def holds(function, arg):
+    # try block for catching errors
+    try:
+        # create a promise for the function to run in another thread
+        p = loop.run_in_executor(None, await function, (arg,))
+        # return if the coroutine takes more than 0.1 seconds to complete
+        # by awaiting the above promise for 0.1 seconds, and returning true if
+        # it didn't finish in time
+        return await asyncio.wait([p], timeout=0.1)[1]
+    except:
+        # code errored, so return true
+        return True
+
+async def weird(f):
+    if await holds(f, f):
+        while True:
+            pass
+        else:
+            return
+
+async def main():
+    # the beginning of the event loop
+    print(await holds(weird, weird))
+
+if __name__ == "__main__":
+    # put main() in the event loop, then wait until it's done
+    loop.run_until_complete(main())
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