I was quite delighted today, after extensive searches yielded nothing, to discover how to place an else condition in a list comprehension. Trivial mask example: >>> [True if i <5 else False for i in range(10)] # A [True, True, True, True, True, False, False, False, False, False]
I then experimented to drop the else statement which yields an error >>> [i if i>3 for i in range(10)] Traceback ( File "<interactive input>", line 1 this syntax works of course >>> [i if i>3 else i for i in range(10)] [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] Does anybody else find this lack of symmetry odd? Nicholas
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