Могло показаться, что выведется словарь с буквами и их повторением в словаре.
dict.setdefault(key, default=None) - возвращает значение по ключу key, а если ключа нет в словаре, то добавляет пару key=default и возвращает значение default.
dict.get(key, default=None) - возвращает значение по ключу key, а если ключа нет, то возвращает default не добавляя пару в словарь.
То есть мы просто каждой букве в слове поставили значение counter.get(char, 1) + 1 = 2.
Чтобы посчитать реальный счетчик повторении есть несколько способов:
s = "hello"
# 1 counter = {} for char in s: counter[char] = counter.setdefault(char, 0) + 1
# 2 counter = {} for char in s: counter[char] = counter.get(char, 0) + 1
# 3 from collections import defaultdict counter = defaultdict(int) for char in s: counter[char] += 1
# 4 from collections import Counter counter = Counter(s)
Могло показаться, что выведется словарь с буквами и их повторением в словаре.
dict.setdefault(key, default=None) - возвращает значение по ключу key, а если ключа нет в словаре, то добавляет пару key=default и возвращает значение default.
dict.get(key, default=None) - возвращает значение по ключу key, а если ключа нет, то возвращает default не добавляя пару в словарь.
То есть мы просто каждой букве в слове поставили значение counter.get(char, 1) + 1 = 2.
Чтобы посчитать реальный счетчик повторении есть несколько способов:
s = "hello"
# 1 counter = {} for char in s: counter[char] = counter.setdefault(char, 0) + 1
# 2 counter = {} for char in s: counter[char] = counter.get(char, 0) + 1
# 3 from collections import defaultdict counter = defaultdict(int) for char in s: counter[char] += 1
# 4 from collections import Counter counter = Counter(s)
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