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POPython 3.3: Catching HTTPError with Timer
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copied!<p>I've been trying to study python and I wanted to try catching a server time out error (in case my internet connection is interrupted or something) and adding a timer that will make the process stop for X seconds (in my code below it is 2 seconds) then try to continue the process again. Although I believe my logic is right (please do correct me if I'm wrong), I get an error that says </p> <pre><code>Exception in thread Thread-1: Traceback (most recent call last): File "C:\Python33\lib\threading.py", line 639, in _bootstrap_inner self.run() File "C:\Python33\lib\threading.py", line 825, in run self.function(*self.args, **self.kwargs) TypeError: 'NoneType' object is not callable </code></pre> <p>I do not quite understand why my timer seems to trigger and error. Here is my code:</p> <pre><code>import urllib.request from threading import Timer req = urllib.request.Request('http://www.nowebsitecontainsthisaddress.com') def ServerTimeOut(e): timer_rest = Timer(2.0, print('Time Out Error:')) timer_rest.start() print (e.reason) while timer_rest.is_alive(): pass while True: try: url = urllib.request.urlopen(req) break except urllib.error.HTTPError as e: ServerTimeOut(e) req = urllib.request.Request('http://www.google.com') except urllib.error.URLError as e: ServerTimeOut(e) req = urllib.request.Request('http://www.google.com') </code></pre> <p>OS Used is windows7</p> <p>Update: Hi Guys, I tried tweaking my code into this and no more error is return. I do hope someone could enligthen me as to why the error was raised.. Thanks ^^,</p> <pre><code>import urllib.request from threading import Timer req = urllib.request.Request('http://www.nowebsitecontainsthisaddress.com') def printMessage(): print('Time Out Error:') def ServerTimeOut(e): timer_rest = Timer(2.0, printMessage) timer_rest.start() print (e.reason) while timer_rest.is_alive(): pass while True: try: url = urllib.request.urlopen(req) break except urllib.error.HTTPError as e: ServerTimeOut(e) req = urllib.request.Request('http://www.google.com') except urllib.error.URLError as e: ServerTimeOut(e) req = urllib.request.Request('http://www.google.com') </code></pre>

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