unnecessary-literal-within-dict-call (C418)

Derived from the flake8-comprehensions linter.

Fix is always available.

What it does

Checks for dict() calls that take unnecessary dict literals or dict comprehensions as arguments.

Why is this bad?

It's unnecessary to wrap a dict literal or comprehension within a dict() call, since the literal or comprehension syntax already returns a dictionary.

Examples

dict({})
dict({"a": 1})

Use instead:

{}
{"a": 1}

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.