I created a series based on Letters: D, E, F and inserted values in this way from 0 to 9 on each row:
df = pd.DataFrame({'letters': list('DDDDDDDDDDEEEEEEEEEEFFFFFFFFFF'), 'numbers': [0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9]})
Output:
letters numbers
0 D 0
1 D 1
2 D 2
....
9 D 9
10 E 0
.....
18 E 8
19 E 9
20 F 0
......
28 F 8
29 F 9
Then I created multi index on this Df with this code ( I wanted to check if this is correct way or there are other ways to create multi index)
latestone = df.set_index(['letters', 'numbers'],drop=False)
output:
letters numbers
letters numbers
D 0 D 0
1 D 1
....
9 D 9
E 0 E 0
1 E 1
...
9 E 9
F 0 F 0
1 F 1
...
9 F 9
Based on this or if there is any better way to create multi index , I would like to know if these values are being sorted lexicographically or not (True or False if possible).
Also, I would like to get the rows with index [2,5,7] for letter E.
One thing you would like to know is whether the values are sorted. No the values are not sorted. They appear exactly as arranged.
To be able to get the rows [2,5,7]you can use:
df.loc[[('E',2),('E',5),('E',7)]]
letters numbers
letters numbers
E 2 E 2
5 E 5
7 E 7
or
In [578]: df.loc[('E',[2,5,7])]
Out[578]:
letters numbers
letters numbers
E 2 E 2
5 E 5
7 E 7