Python Multiple return values (Tuple, Dict)

# Question:

# Write a program that accepts a sentence and calculate the number #of letters and digits.

# Suppose the following input is supplied to the program:

# hello world! 123

# Then, the output should be:

# LETTERS 10

# DIGITS 3

[Tuple 이용]

def countingStr(sentence):

countNum = 0

countChar = 0

for i in range(len(sentence)):

if((65 <= ord(sentence[i]) and ord(sentence[i]) <= 90) or (97 <= ord(sentence[i]) and ord(sentence[i]) <= 122)):

countChar += 1

elif(48 <= ord(sentence[i]) and ord(sentence[i]) <= 59):

countNum += 1

return (countChar, countNum)

countChar, countNum = countingStr(input())

print ('LETTERS: ', countChar)

print ('DIGITS: ', countNum)

[Dictionary 자료형]

def countingStr(sentence):

letterAndNumber = {'LETTERS' : 0, 'DIGITS' : 0}

for i in range(len(sentence)):

if(sentence[i].isalpha()):

letterAndNumber['LETTERS'] += 1

elif(sentence[i].isdigit()):

letterAndNumber['DIGITS'] += 1

return letterAndNumber

promptStr = input()

table = countingStr(promptStr)

print ('LETTERS: ', table.get('LETTERS'))

print ('DIGITS: ', table.get('DIGITS'))

Reference site : 

https://github.com/zhiwehu/Python-programming-exercises/blob/master/100%2B%20Python%20challenging%20programming%20exercises.txt