sort dataframe by then by code example

Example 1: sort by dataframe

DataFrame.sort_values(self, by, axis=0, ascending=True,
                      inplace=False, kind='quicksort',
                      na_position='last',
                      ignore_index=False)

# Example
df.sort_values(by=['ColToSortBy'])

Example 2: sort a dataframe

sort_na_first = gapminder.sort_values('lifeExp',na_position='first')