how to sort dataframes in python code example

Example 1: df.sort_values(by='col1',asending=True)

>>> df.sort_values(by='col1', ascending=False)
  col1  col2  col3 col4
4    D     7     2    e
5    C     4     3    F
2    B     9     9    c
0    A     2     0    a
1    A     1     1    B
3  NaN     8     4    D

Example 2: dataframe, sort by columns

final_df = df.sort_values(by=['2'], ascending=False)