Python-初始化多个列表/行 [英] Python - Initializing Multiple Lists/Line

问题描述

这非常丑陋:

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

有没有办法在一行上声明这些变量?

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

推荐答案

alist, blist, clist, dlist, elist = ([] for i in range(5))

上述方法的缺点是，您需要计算=左侧的名称数量，并在右侧具有完全相同的空列表数量(例如，通过range调用，或更明确地)手 边.

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.

主要是，请勿使用类似

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

也

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

这将使所有名称引用相同空白列表！

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

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