【Python】文章に出現する文字・文字列（単語）の回数を数える（setdefaultメソッド）

sentence = "they’re things we do around the house like doing the laundry, washing the dishes and so on."
alp = {}

for character in sentence:
    alp.setdefault(character, 0)
    alp[character] = alp[character] + 1

print(alp)

# {'t': 5, 'h': 8, 'e': 9, 'y': 2, '’': 1, 'r': 3, ' ': 16, 'i': 5, 'n': 7, 'g': 3, 's': 6, 'w': 2,
'd': 6, 'o': 6, 'a': 4, 'u': 3, 'l': 2, 'k': 1, ',': 1, '.': 1}

sentence = "they’re things we do around the house like doing the laundry, washing the dishes and so on."
alp = {}

for character in sentence:
    alp.setdefault(character, 0)
    alp[character] = alp[character] + 1

alp = sorted(alp.items())
print(alp)
# [(' ', 16), (',', 1), ('.', 1), ('a', 4), ('d', 6), ('e', 9), ('g', 3), ('h', 8), ('i', 5),
('k', 1), ('l', 2), ('n', 7), ('o', 6), ('r', 3), ('s', 6), ('t', 5), ('u', 3), ('w', 2), ('y', 2), ('’', 1)]

sentence = "they're things we do around the house like doing the laundry, washing the dishes and so on. Let's do it."
word = ""
words = {}
for character in sentence:
    if character == " " or character == "," or character == ".":
        if not word == "":
            words.setdefault(word,0)
            words[word] = words[word] + 1
            word = ""
    else:
        word = word + character
print(words)