pandas dataframe sort by column

1df.sort_values(by='col1', ascending=False)

1>>> df.sort_values(by=['col1'], ascending = False)
2    col1 col2 col3
30   A    2    0
41   A    1    1
52   B    9    9
65   C    4    3
74   D    7    2
83   NaN  8    4
9

1>>> df.sort_values(by=['col1'])
2    col1 col2 col3
30   A    2    0
41   A    1    1
52   B    9    9
65   C    4    3
74   D    7    2
83   NaN  8    4
9

1df.sort_values(by=['col1])