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If I want to declare three new arrays (a1, a2, a3), I can do this:
a1=[]
a2=[]
a3=[]
But now I want to do it all on one line, like
a1, a2, a3 = []
but this fails. How can I assign them all to an empty array on one line?
To do something similar to your second example, you would still need to create three arrays: