f-string-number-format (FURB116)

Added in 0.13.0 · Related issues · View source

Derived from the refurb linter.

Fix is sometimes available.

What it does

Checks for uses of bin(...)[2:] (or hex, or oct) to convert an integer into a string.

Why is this bad?

When converting an integer to a baseless binary, hexadecimal, or octal string, using f-strings is more concise and readable than using the bin, hex, or oct functions followed by a slice.

Example

print(bin(1337)[2:])

Use instead:

print(f"{1337:b}")

Fix safety

The fix is only marked as safe for integer literals, all other cases are display-only, as they may change the runtime behaviour of the program or introduce syntax errors.