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>>> bool(datetime(2018, 1, 1).time())
False
>>> bool(datetime(2018, 1, 1, 13, 12, 11).time())
True


До Python 3.5 объекты datetime.time() считались ложными, если они представляли полночь по UTC. Это могло приводить к трудноуловимым ошибкам. В следующих примерах if not может выполниться не потому, что created_time равен None, а потому, что время — полночь.


def create(created_time=None) -> None:
if not created_time:
created_time = datetime.now().time()


Можно исправить это, явно проверяя на None:


def create(created_time=None) -> None:
if created_time is None:
created_time = datetime.now().time()


👉@BookPython



tg-me.com/BookPython/3704
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>>> bool(datetime(2018, 1, 1).time())
False
>>> bool(datetime(2018, 1, 1, 13, 12, 11).time())
True


До Python 3.5 объекты datetime.time() считались ложными, если они представляли полночь по UTC. Это могло приводить к трудноуловимым ошибкам. В следующих примерах if not может выполниться не потому, что created_time равен None, а потому, что время — полночь.


def create(created_time=None) -> None:
if not created_time:
created_time = datetime.now().time()


Можно исправить это, явно проверяя на None:


def create(created_time=None) -> None:
if created_time is None:
created_time = datetime.now().time()


👉@BookPython

BY Библиотека Python разработчика | Книги по питону


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China’s stock markets are some of the largest in the world, with total market capitalization reaching RMB 79 trillion (US$12.2 trillion) in 2020. China’s stock markets are seen as a crucial tool for driving economic growth, in particular for financing the country’s rapidly growing high-tech sectors.Although traditionally closed off to overseas investors, China’s financial markets have gradually been loosening restrictions over the past couple of decades. At the same time, reforms have sought to make it easier for Chinese companies to list on onshore stock exchanges, and new programs have been launched in attempts to lure some of China’s most coveted overseas-listed companies back to the country.

Look for Channels Online

You guessed it – the internet is your friend. A good place to start looking for Telegram channels is Reddit. This is one of the biggest sites on the internet, with millions of communities, including those from Telegram.Then, you can search one of the many dedicated websites for Telegram channel searching. One of them is telegram-group.com. This website has many categories and a really simple user interface. Another great site is telegram channels.me. It has even more channels than the previous one, and an even better user experience.These are just some of the many available websites. You can look them up online if you’re not satisfied with these two. All of these sites list only public channels. If you want to join a private channel, you’ll have to ask one of its members to invite you.

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