Do not use variables named 'I', 'O', or 'l' (E741)
Variables named I
, O
, and l
can be very hard to read. This is because the letter I
and the letter l
are easily confused, and the letter O
and the number 0
can be easily confused.
Change the names of these variables to something more descriptive.
Anti-pattern
The code in this example could be misinterpreted to be 0 * 1.08
(zero times one-point-eight).
O = 100.0
total = O * 1.08
Best practice
This example clarifies that we’re multiplying an order
variable by another number.
order = 100.0
total = order * 1.08