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copied!<p>I have figured out the problem where I was stuck and I have come up with this solution:-</p> <ol> <li>When I press Ctrl + C (on Windows), the KeyboardInterrupt actually happens in fd.readline(). So, I just placed a try...except there, so that the generator function yields the file descriptor whenever Ctrl + C is hit. If there is no KeyBoardInterrupt , then, just print a newly read line from tempfile</li> <li>This file descriptor is checked using isinstance() in the main body, and if it is found to be a file, then, I'm closing the file as well as the generator</li> </ol> <p><strong>PS</strong>: (this KeyboardInterrupt might vary on Linux..probably SigTerm will be raised, but, please check. So, in order to make the code generic, just remove KeyBoard Interrupt and use just normal except)</p> <pre><code>import sys, traceback filename = 'tempfile' def tail(filename): fd = open(filename) while True: try: line = fd.readline() except KeyboardInterrupt: print 'keyboard interrupt here' yield fd if not line: continue else: yield line try: genObj = tail(filename) valfromgen= genObj.next() while valfromgen: if isinstance(valfromgen, file): print 'Closing this file now as `tail` yielded a file descriptor' valfromgen.close() genObj.close() break print 'Yielded line: ', valfromgen valfromgen= genObj.next() print 'Just in order to check that things are in order, the following line will raise StopIteration. If it raises, it means we are good.' print genObj.next() except: traceback.print_exc() </code></pre> <hr>

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