[英]Sorting and filtering dataframes in Pandas Python
df = pd.DataFrame({"ali":[4,5,3,4,5,8,7],"mali":[1,10,2,4,6,6,7]})
# output
ali mali
0 4 1
1 5 10
2 3 2
3 4 4
4 5 6
5 8 6
6 7 7
df[df.mali<5].sort_values(by="ali") # you could reset your index here also.
#output
ali mali
2 3 2
0 4 1
3 4 4
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