Python for loop - why does this not infinite loop? -


consider following snippet of python code:

x = 14 k in range(x):     x += 1

at end of execution, x equal 28.

my question: shouldn't code loop forever? @ each iteration, checks if k less x. however, x incremented within loop, has higher value next comparison.

range(x) not "command". creates range object 1 time, , loop iterates on that. changing x not change objects made using it.

>>> x = 2 >>> k = range(x) >>> list(k) [0, 1] >>> x += 1 >>> list(k) [0, 1]

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