math-constant (FURB152)

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 literals that are similar to constants in math module.

Why is this bad?

Hard-coding mathematical constants like π increases code duplication, reduces readability, and may lead to a lack of precision.

Example

A = 3.141592 * r**2

Use instead:

A = math.pi * r**2

References

• Python documentation: math constants