See discussion on #8384 - Running pycodestyle v2.3.1 currently reports 81 cases of E741 which is one of a set of three style checks to avoid ambiguous single letter names which look like numbers: E741 do not use variables named ‘l’, ‘O’,...
1.70708371E741 ambiguous variable name 'l' 0.634979138E722 do not use bare except 0.36350379E402 module level import not at top of file 0.13803930E731 do not assign a lambda expression, use a def 0.03681048E502 the backslash is redundant between brackets ...