>>> df = pd.DataFrame({'a': [1,1,1,2,2,3,3,3,3,4,4,5,5],
'b': [0,1,1,0,1,0,0,1,4,1,0,3,0],
'v': [2,4,3,7,6,5,9,3,2,4,5,2,3]})
>>> df
a b v
0 1 0 2
1 1 1 4
2 1 1 3
3 2 0 7
4 2 1 6
5 3 0 5
6 3 0 9
7 3 1 3
8 3 4 2
9 4 1 4
10 4 0 5
11 ...
21 сен. 2018, в 21:57