how to order a pandas dataframe by a column code example

Example 1: sort dataframe by column

df.sort_values(by='col1', ascending=False)

Example 2: pandas order dataframe by column of other dataframe

df1 = df1.set_index('column_in_df1')
df1 = df1.reindex(index=df2['column_in_df2'])
df1 = df1.reset_index()