Convert sentence to all upper case letters

sentence = "Practice makes perfect" #input lowerCaseLetters = list(map(chr, range(97, 123))) #list of lowercase alphabets upperCaseLetters = list(map(chr, range(65, 91))) #list of uppercase alphabets sentenceSplit = list(sentence) #sentence split into characters in a list length = len (sentence) #number of characters in sentence for x in range (0, length): isLowerCase = sentenceSplit[x].islower() #check if character x in sentence is lower case if(isLowerCase == True): loc = lowerCaseLetters.index(sentenceSplit[x]) #find where character x is in lowercase array sentenceSplit[x] = upperCaseLetters[loc] #change lowercase letter to upper case newSentence = "".join(sentenceSplit) #convert the list into a string print (newSentence)