There's a better variable naming scheme for generic lists: Use xs. If you have multiple lists use ys etc. This has multiple benefits over L in terms of readab

There's a better variable naming scheme for generic lists: Use xs. If you have multiple lists use ys etc. This has multiple benefits over L in terms of readability anad understandability as a single-item variable names can be made to match the list naming scheme: for x in xs: for y in ys: do_some_fancy_calculation(x,y)