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')