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Home/ Questions/Q 655825
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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T22:38:49+00:00 2026-05-13T22:38:49+00:00

This is terribly ugly: psData = [] nsData = [] msData = [] ckData

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This is terribly ugly:

psData = []
nsData = []
msData = []
ckData = []
mAData = []
RData = []
pData = []

Is there a way to declare these variables on a single line?

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  1. Editorial Team
    Editorial Team
    2026-05-13T22:38:50+00:00Added an answer on May 13, 2026 at 10:38 pm
    alist, blist, clist, dlist, elist = ([] for i in range(5))
    

    The downside of above approach is, you need to count the number of names on the left of = and have exactly the same number of empty lists (e.g. via the range call, or more explicitly) on the right hand
    side.

    The main thing is, don’t use something like

    alist, blist, clist, dlist, elist = [[]] * 5
    

    nor

    alist = blist = clist = dlist = elist = []
    

    which would make all names refer to the same empty list!

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