‘dataframe’ object has no attribute ‘sort’ – Python Error

Python throws the error, ‘dataframe’ object has no attribute ‘sort’, because Pandas deprecated sort() function in favor of sort_values() and sort_index().

As, the name indicates, sort_values() is used to sort a dataframe by value and sort_index() sorts it by index.

Consider this example –

np.random.seed(0)
df = pd.DataFrame({'A': list('accab'), 'B': np.random.choice(10, 5)})
df
   A  B
0  a  7
1  c  9
2  c  3
3  a  5
4  b  2

In this code, we are defining a DataFrame, df, with two columns, A and B. The first column is the array of characters, ['a', 'c', 'c', 'a', 'b']. The second column is the random number array with 5 values and maximum weight of 10.

Now, in order to sort this dataframe, we can use sort_values() or sort_index().

To sort it by value and using single column –

df.sort_values(by='A')

   A  B
0  a  7
3  a  5
4  b  2
1  c  9
2  c  3

To sort it by multiple columns –

df.sort_values(by=['A', 'B'])

   A  B
3  a  5
0  a  7
4  b  2
2  c  3
1  c  9

To sort it by index, use sort_index() –

df.sort_index()

   A  B
0  a  7
1  c  9
2  c  3
3  a  5
4  b  2

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