Pandas: sort_index

Dataframes have a new sort_index method to sort a dataframe by index. This is equivalent to the deprecated sort method with the columns argument set to `None.

import pandas as pd
df = pd.DataFrame([1, 2, 3, 4, 5], index=[100, 29, 234, 1, 150], columns=['A'])
df.sort_index(inplace=True)
print(df.to_string())
     A
1    4
29   2
100  1
150  5
234  3

Via Stack Overflow.