DeepSource
Dashboard Resources Pricing Discover Directory Log in

Run your first analysis.

Find thousands of code security and quality issues in your codebase, before they end up in production.

Start now
Python

Python

Made by DeepSource
Use Analyzer

Unused format string argument PYL-W1304

Anti-pattern
Major

The format string that uses named field(s), is used with an argument that is not required by the format string. It is recommended to remove unused keyword-arguments for a better readability.

Not preferred:

def greet_user(user):
    print(
        "Hi {name}!. Welcome to {location}.".format(
            name=user.first_name, location=user.updated_loc, age=user.age
        )
    )

Here, the argument age is nowhere used in the format string and should be removed.

Preferred:

def greet_user(user):
    print(
        "Hi {name}!. Welcome to {location}.".format(
            name=user.first_name, location=user.updated_loc
        )
    )