string list max value python [duplicate]

Question

how to check from a python string list which is the largest item and copy it to another list. i was trying this. but i dosnt Works.

cad_1 = ['hello', 'hello', 'ewe', 'uwu']
cad_final = {i,j for i,j in Cad_1 if len(i)>=len(j)}
print(cad_final);

This will produce a NameError before even getting to the second line... the second line is a set comprehension and you can't loop through a list like that anyway. If you want help you need to clarify exactly what the error is. — sam-pyt
– sam-pyt, Commented Nov 6, 2018 at 7:49
@PanBasic you want all longest strings (both "hello"s) or only one? — zypro
– zypro, Commented Nov 6, 2018 at 7:50
Welcome to StackOverflow! Are hello, ewe, and uwu variables or string? Can you clarify what do you mean by largest? Largest value? Longest string? By alphabetical order? — Andreas
– Andreas, Commented Nov 6, 2018 at 7:50
Specify "doesn't work". What is your expected output, and what is your actual output? As it stands, this code doesn't run. — SiHa
– SiHa, Commented Nov 6, 2018 at 7:51

dheinz · Accepted Answer · 2018-11-06 07:52:29Z

0

You can first create a dictionary with the respective string length:

my_length_list = {i:len(i) for i in my_list}

and then get the largest element by

import operator

max_string_len = max(my_length_list.items(), key=operator.itemgetter(1))[0]

and write this value in another list

max_string_list = [max_string_len]

answered Nov 6, 2018 at 7:52

dheinz

1,09411 silver badges17 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

or max(my_list, key=len).

this is simples one!

Ah thank you, I did not know this :) Fairly simply like this