How can I sum value in list of dataframe

I want to sum values in list that store in dataframe in column path_pair

So the result I want to acheive can be replace same column or create a new one it something looks like this:

How can I do the script?

>Solution :

You can apply sum function to the path_pair column:

df['path_pair_sum'] = df['path_pair'].apply(sum)

Output:

  session_id path           path_pair  path_pair_sum
0        T01  abc        [0.03, 0.09]           0.12
1        T02  def  [0.02, 0.15, 0.26]           0.43