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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Should You Buy Bitcoin?
In general, many financial experts support their clients’ desire to buy cryptocurrency, but they don’t recommend it unless clients express interest. “The biggest concern for us is if someone wants to invest in crypto and the investment they choose doesn’t do well, and then all of a sudden they can’t send their kids to college,” says Ian Harvey, a certified financial planner (CFP) in New York City. “Then it wasn’t worth the risk.” The speculative nature of cryptocurrency leads some planners to recommend it for clients’ “side” investments. “Some call it a Vegas account,” says Scott Hammel, a CFP in Dallas. “Let’s keep this away from our real long-term perspective, make sure it doesn’t become too large a portion of your portfolio.” In a very real sense, Bitcoin is like a single stock, and advisors wouldn’t recommend putting a sizable part of your portfolio into any one company. At most, planners suggest putting no more than 1% to 10% into Bitcoin if you’re passionate about it. “If it was one stock, you would never allocate any significant portion of your portfolio to it,” Hammel says.
