The replace_ending function replaces the old string in a sentence with the new string, but only if the sentence ends with the old string

Question

The replace_ending function replaces the old string in a sentence with the new string, but only if the sentence ends with the old string. If there is more than one occurrence of the old string in the sentence, only the one at the end is replaced, not all of them. For example, replace_ending("abcabc", "abc", "xyz") should return abcxyz, not xyzxyz or xyzabc. The string comparison is case-sensitive, so replace_ending("abcabc", "ABC", "xyz") should return abcabc (no changes made).

def replace_ending(sentence, old, new):
# Check if the old string is at the end of the sentence 
if ___:
    # 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 = ___
    new_sentence = ___
    return new_sentence

# 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"

Answer 1

The answer is below. the question belong to google learning of python.

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 = sentence.rfind(old)
        new_sentence = sentence[:i]+new
    return new_sentence

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