f-string-number-format (FURB116)

Derived from the refurb linter.

Fix is sometimes available.

This rule is unstable and in preview. The --preview flag is required for use.

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}")