Please help me out with symbols code coach problem

Question

I can't put spaces in-between the words and prevent it from printing three times.
https://code.sololearn.com/cY3Q86IPrYZd/?ref=app

Answer 1

Maybe just add a condition for i==' ' apart from it being isalnum(). Then it won't get cleared and so you won't need to add it again later on.

Answer 2

check for spaces as well
res_str=[i for i in str if i.isalnum() or i==" "]

Answer 3

Chinyere [Inactive] Try:

"([a-zA-Z0-9 ]*)" note there is a space after the 9

Answer 4

Just add break at the bottom-most part of the for loop

Answer 5

Solution
mess = input()
message =""
alphabet=" 1234567890abcdefghijklmnopqrstuvwxyz"
for i in mess :
for j in alphabet :
if i == j or i == j.upper ():
message += i
print(message)