string-dot-format-invalid-format (F521)

Added in v0.0.138 · Related issues · View source

Derived from the Pyflakes linter.

What it does

Checks for str.format calls with invalid format strings.

Why is this bad?

Invalid format strings will raise a ValueError.

Example

"{".format(foo)

Use instead:

"{}".format(foo)

References

• Python documentation: str.format