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pythonalgorithmuppercaselowercase

Python: how does this translator replace letters

def translate(phrase):
    translation = ""
    for letter in phrase:
        if letter.lower() in "aeiouy":
            if letter.upper():
                translation = translation + "G"
            else:
                translation = translation + "g"
        else:
            translation = translation + letter
    return translation
print(translate(input("Enter A Phrase to Translate: ")))

I'm just learning python and following a tutorial and I don't understand this code. So this is a basic translator that makes all vowels "G", the for loop picks every letter in a phrase that the user enters and checks if it is a vowel, what I don't get is after it finds the vowels, it adds g to the translation, how does this work, if your trying to replace the vowel why does adding g to the entire thing translate it?

Solution

  • The key is here:

            if letter.lower() in "aeiouy":
            if letter.upper():
                translation = translation + "G"
            else:
                translation = translation + "g"
        else:
            translation = translation + letter

    If the letter is a vowel, then it adds a g instead of the supposed vowel (translation = translation + letter won't be executed).

    Also, since letter.upper() doesn't check if it's lowercase (it just turns the character into uppercase), translation = translation + "g" will never be reached- maybe replace letter.upper() with letter == letter.upper()?