CoCalc -- Collaborative Calculation in the Cloud
Sharedsupport / 2015-05-19-154505-sparse.sagewsOpen in CoCalc

Examples for support purposes...

keys = [(0,1),(1,2)] # the length of keys maybe very long
values = [0,1] # values have the s
dict(zip(keys,values))
{(0, 1): 0, (1, 2): 1}