ambiguous-variable-name (E741)

Derived from the pycodestyle linter.

What it does

Checks for the use of the characters 'l', 'O', or 'I' as variable names.

Why is this bad?

In some fonts, these characters are indistinguishable from the numerals one and zero. When tempted to use 'l', use 'L' instead.

Example

l = 0
O = 123
I = 42

Use instead:

L = 0
o = 123
i = 42