Making each column of each DataFrame in a list into its own list within a big list

Question

Task Description

If I have a list of DataFrames in say a_list and each list looked like the following:

    1  2  3
a   x  x  x
b   y  y  y 
c   z  z  z

I am interested in making each column of each DataFrame in a_list into its own list.

So say b_list[0] would be

    1  
a   x 
b   y  
c   z

b_list[1] would be

    2  
a   x 
b   y  
c   z

etc.

I currently have around 150 DataFrames in a list with each having 30+ columns. So the desired list would have around b_list[4500] Any help with this would be awesome!

Answer 1

Try this:

b_list = []
for df in a_list:
    for col in df.columns:
        b_list.append(df[[col]])