How To Add A Character To A List If Two Items From Another List Appear Consecutively? Python

I have a DataFrame in which each cell contains a list. I have a function that aims to insert a '1' into each list, based on a condition. However, my code is not doing what I expect

Solution 1:

with this question, your answer is to change your function func by:

def func(row):
    look =2for i inrange(len(row)-look):
        if (row[i] in members) & \
           (row[i+1] in non_members) & \
           (row[i+2] in non_members):
            # if the conditionis met, return the list with the 1 added where you want
            returnrow[:i+1] + ['1'] +row[i+1:]
    # incase you never met your condition, you return the original list without changes
    returnrow

Your problem was that you mixed str and list type in your func