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)
Traders also expressed uncertainty about the situation with China Evergrande, as the indebted property company has not provided clarification about a key interest payment.In economic news, the Commerce Department reported an unexpected increase in U.S. new home sales in August.Crude oil prices climbed Friday and front-month WTI oil futures contracts saw gains for a fifth straight week amid tighter supplies. West Texas Intermediate Crude oil futures for November rose $0.68 or 0.9 percent at 73.98 a barrel. WTI Crude futures gained 2.8 percent for the week.
Should I buy bitcoin?
“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.
