similar code logic, two different answers

user_18291314 0
Viewed 41

why does the output of these two functions give different outputs when the logic or idea is the same and they are working with the same string?

def solution(inputString):
    a = ""
    b = a[::-1]
    if a == b:
        return True
    else:
        return False



print(solution("az"))

def ans(something):
    if something == reversed(something):
        print(True)
    else:
        print(False)
ans('az')
palindrome python-3.x python
2 Answers

This is I think because you are not using your inputString parameter in the function solution(). This may be closer to what you want:

def solution(inputString):
    a = inputString
    b = a[::-1]
    if a == b:
        return True
    else:
        return False
user_172430080

when the logic or idea is the same

No, the solution and ans functions have different logic.

solution uses the common way of reversing a string, thats fine

However, the second function uses reversed() function, which does:

reversed(seq)

Return a reverse iterator. seq must be an object which has a __reversed__() method or supports the sequence protocol ...

It does not return the reversed string as you'd probably expected.

To put that in perspective, the following code returns False:

print("oof" == reversed("foo"))

Because the return value of reversed("foo") is an <reversed object> and not the reversed String.

user_56255470
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