[Python] 회문 / 마지막 문자열 바꾸기

1️⃣회문인지 검사하는 함수

# 회문인지 검사
def is_palindrome(input_string):
    # We'll create two strings, to compare them
    new_string = ""
    reverse_string = ""
    # Traverse through each letter of the input string
    for i in input_string:
        # Add any non-blank letters to the
        # end of one string, and to the front
        # of the other string.
        if i != " ":
            new_string += i.lower()
            reverse_string = i.lower() + reverse_string
    # Compare the strings
    if new_string == reverse_string:
        return True
    return False

print(is_palindrome("Never Odd or Even")) # Should be True
print(is_palindrome("abc")) # Should be False
print(is_palindrome("kayak")) # Should be True

 

2️⃣문자열 A, B, C 를 입력받고, A가 B로 끝나는 경우, 그 한 부분만 C로 바꿔서 출력

def replace_ending(sentence, old, new):
    # Check if the old string is at the end of the sentence
    if sentence.endswith(old):
        # Using i as the slicing index, combine the part
        # of the sentence up to the matched string at the
        # end with the new string
        i = len(sentence) - len(old)
        new_sentence = sentence[:i]
        return new_sentence + new

    # Return the original sentence if there is no match
    return sentence


print(replace_ending("It's raining cats and cats", "cats", "dogs"))
# Should display "It's raining cats and dogs"
print(replace_ending("She sells seashells by the seashore", "seashells", "donuts"))
# Should display "She sells seashells by the seashore"
print(replace_ending("The weather is nice in May", "may", "april"))
# Should display "The weather is nice in May"
print(replace_ending("The weather is nice in May", "May", "April"))
# Should display "The weather is nice in April"