How to use sort_index sorting in python pandas
This article mainly introduces "how python pandas uses sort_index sorting". In daily operations, I believe many people have doubts about how python pandas uses sort_index sorting. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "how python pandas uses sort_index sorting"! Next, please follow the editor to study!
The python pandas sort_index () method is specifically used to sort the index. Let's take a look at the specific usage:
# specified id column index column
> df=pd.read_excel (ringing DGV > myExcel > 1.xlsxx, index_col='id')
> df
Name score grade
Id
A bog 45.0 A
C jiken 67.0 B
I bob 23.0 A
B jiken 34.0 B
G lucy NaN A
E tidy 75.0 B
1. Sort rows by index
# rows index in ascending order
> > df.sort_index ()
Name score grade
Id
A bog 45.0 A
B jiken 34.0 B
C jiken 67.0 B
E tidy 75.0 B
G lucy NaN A
I bob 23.0 A
2. Row index in descending order
> df.sort_index (ascending=False)
Name score grade
Id
I bob 23.0 A
G lucy NaN A
E tidy 75.0 B
C jiken 67.0 B
B jiken 34.0 B
A bog 45.0 A
3. Index permutation for column
> df.sort_index (axis=1)
Grade name score
Id
An A bog 45.0
C B jiken 67.0
I A bob 23.0
B B jiken 34.0
G A lucy NaN
E B tidy 75.0
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