missing-newline-at-end-of-file (W292)

Derived from the pycodestyle linter.

Fix is always available.

What it does

Checks for files missing a new line at the end of the file.

Why is this bad?

Trailing blank lines in a file are superfluous.

However, the last line of the file should end with a newline.

Example

spam(1)

Use instead:

spam(1)\n