j = win["start"][int(k == 0)] - sep_size
if (j >= 0 and j < screen_size[int(k == 0)]):
start = win["start"][k]
- start = start if start >= 0 else 0
+ # start = start if start >= 0 else 0
end = win["start"][k] + win["size"][k]
end = end if end < screen_size[k] else screen_size[k]
if k: