Hi Friends, I am new to Generators and was learning the same by experimenting. I wrote a small code which is as below.
>>> def test_gen(var): ... print "The number is", var ... if var % 2 == 0: ... yield var ... else: ... print "Number is odd" ... >>> But when i was executing i saw a behavior i could not understand. When i gave an even number, 1. The generator object was created 2. When i gave next the argument was yielded. 3. In the subsequent next the Stop Iteration was raised. >>> res = test_gen(78) >>> res.next() The number is 78 78 >>> res.next() Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration But When i ran with an odd number the result of "Number is odd" is printed. But it seems the generator runs again by itself to Stop Iteration. >>> res2 = test_gen(77) >>> res2.next() The number is 77 Number is odd Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration >>> How did this happen automatically? I am not able to get the execution of a generator. Can someone please help me in understanding? Regards, Krishnan
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