python-dataframe重設索引,reset_index
阿新 • • 發佈:2020-11-28
1 In [4]: testset 2 Out[4]: 3 uid iid rating timestamp 4 2 22 377 1 878887116 5 4 166 346 1 886397596 6 8 305 451 3 886324817 7 15 303 785 3 879485318 8 23 291 118 2 874833878 9 ... ... ... ... ... 10 99980 864 685 4 888891900 1199982 279 64 1 875308510 12 99983 646 750 3 888528902 13 99990 806 421 4 882388897 14 99999 12 203 3 879959583 15 16 [20000 rows x 4 columns] 17 #reset_index()使dataframe的索引重新從0開始自增排列 18 In [5]: testset.reset_index() 19 Out[5]: 20 index uid iid rating timestamp21 0 2 22 377 1 878887116 22 1 4 166 346 1 886397596 23 2 8 305 451 3 886324817 24 3 15 303 785 3 879485318 25 4 23 291 118 2 874833878 26 ... ... ... ... ... ... 27 19995 99980 864 685 4 888891900 2819996 99982 279 64 1 875308510 29 19997 99983 646 750 3 888528902 30 19998 99990 806 421 4 882388897 31 19999 99999 12 203 3 879959583 32 33 [20000 rows x 5 columns]