Selecting rows of pandas DataFrame where column is not empty list

Question

I have a pandas DataFrame where one column contains lists and would like to select the rows where the lists are not empty.

Example data:

df = pd.Data         


        

Answer 1

Or you can follow your own logic using length of the list to determine keep or not .

df[df.my_list.str.len().gt(0)]
Out[1707]: 
  letter    my_list
0      a  [0, 1, 2]
1      b     [1, 2]
4      e     [0, 1]

Answer 2

Empty lists evaluate to False in a boolean context

df[df.my_list.astype(bool)]

  letter    my_list
0      a  [0, 1, 2]
1      b     [1, 2]
4      e     [0, 1]