unnecessary-literal-within-tuple-call (C409)

Derived from the flake8-comprehensions linter.

Fix is always available.

What it does

Checks for tuple calls that take unnecessary list or tuple literals as arguments.

Why is this bad?

It's unnecessary to use a list or tuple literal within a tuple() call, since there is a literal syntax for these types.

If a list literal was passed, then it should be rewritten as a tuple literal. Otherwise, if a tuple literal was passed, then the outer call to tuple() should be removed.

Examples

tuple([1, 2])
tuple((1, 2))

Use instead:

(1, 2)
(1, 2)

Fix safety

This rule's fix is marked as unsafe, as it may occasionally drop comments when rewriting the call. In most cases, though, comments will be preserved.