Checking a list of strings as palindrome in python 3

Question

I am checking a list of strings if every string in the list is palindrome or not. I need a for loop to test the function for all strings in the list.

l=["Anna", "Civic", "Computer" ]

First, i write a code just like this below:

def is_it_palindrome(list):
for x in list:
    if x.upper() == x[::-1].upper():
        return True
    else:
        return False

when I run this code, it only returns one True. not True True False Then I change my code:

def is_it_palindrome(list):
for x in list:
    if x.upper() == x[::-1].upper():
        print("True")
    else:
        print("False")

It works. However, Could anyone tell me why the first one do not work and the second one is true or not. Thank you.

Answer 1

The reason that your first def isn't work is since you are using return with causing your function to return value and stop the loop.
I suggest you to use map built-in function as following, just notice that it can be written in a better way

str_list =["Anna", "Civic", "Computer" ]

def is_it_palindrome(word):
    return word.upper() == word[::-1].upper()

list(map(is_it_palindrome, str_list))

EDIT - this can also be written with lmbda function, which is more Pythonic way, but I got confuse with it some times.

str_list =["Anna", "Civic", "Computer" ]
list(map(lambda x: x.upper() == x[::-1].upper() , str_list ))