expressions-in-star-assignment (F621)

Derived from the Pyflakes linter.

What it does

Checks for the use of too many expressions in starred assignment statements.

Why is this bad?

In assignment statements, starred expressions can be used to unpack iterables.

In Python 3, no more than 1 << 8 assignments are allowed before a starred expression, and no more than 1 << 24 expressions are allowed after a starred expression.