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Sourcery rule id: tuple-literal


Replace tuple() with ()


x = tuple()


x = ()


The most concise and Pythonic way to create an empty tuple is to use the () literal.

This fits in with the way we create tuples with items, saving a bit of mental energy that might be taken up with thinking about two different ways of creating tuples:

x = ("first", "second")

Doing things this way has the added advantage of being a nice little performance improvement. Here are the timings before and after the change:

$ python3 -m timeit "tuple()"
10000000 loops, best of 5: 22.6 nsec per loop
$ python3 -m timeit "()"
50000000 loops, best of 5: 5.46 nsec per loop