To sum up values of same items in a list of tuples while they are string

Question

If I have list of tuples like this:

my_list = [(\'books\', \'$5\'), (\'books\', \'$10\'), (\'ink\', \'$20\'), (\'paper\', \'$15\'), (\'paper\', \'$20\'), (\'pap         


        

Answer 1

Just for fun, a one-liner:

[(k,'$'+str(sum(int(e[1][1:]) for e in my_list if e[0]==k))) for k in set(map(lambda x:x[0], my_list))]

Don't actually do this.