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raise-literal (B016)#

Derived from the flake8-bugbear linter.

What it does#

Checks for raise statements that raise a literal value.

Why is this bad?#

raise must be followed by an exception instance or an exception class, and exceptions must be instances of BaseException or a subclass thereof. Raising a literal will raise a TypeError at runtime.


raise "foo"

Use instead:

raise Exception("foo")