This is a question related to the string index out of range error that came out when I tried to change the string by mistake

import csv 

f = open ('complexity_20191231.csv')         
confuse = csv.reader(f) 
next(confuse)     
confuse = list(confuse)

len(confuse[0])

for row in confuse:
    for i in range(1,42):
        if i>=5:
            row[i] = float(row[i])