Вторая по частоте future-функция, которую я использовал, это абсолютный импорт
from __future__ import absolute_import
Что она делает?
Изменения, которые вносит эта инъекция описаны в PEP328
Покажу простой пример.
Допустим, есть такой пакет:
/my_package
/__init__.py
/main.py
/string.py
Смотрим код в my_package/main.py
# main.py
import string
Простой пример готов) Вопрос в том, какой модуль импортируется в данном случае? Есть два варианта:
1. модуль в моём пакете my_package.string
2. стандартный модуль string
И вот тут вступает в дело приоритет импортов. В Python2 порядок следующий: помимо иных источников, раньше ищется модуль внутри текущего пакета, а потом в стандартных библиотеках. Таким образом мы импортнём my_package.string.
Но в Python3 это поведение изменилось. Если мы указываем просто имя пакета, то ищется именно такой модуль, игнорируя имена в текущем пакете. Если мы хотим импортнуть именно подмодуль из нашего пакета то, мы должны теперь явно это указывать.
from my_package import string
или относительный импорт, но с указанием пути относительно текущего модуля main
from . import string
Еще одной неоднозначностью меньше 😎
Подробней про импорты здесь:
https://docs.python.org/3/tutorial/modules.html
#2to3#pep#basic
🔴 Today I suggest you plunge into the past and visit the mill, which is 130 years old!
Pflaumer's Mill is a wooden giant on the banks of the Volga
On the left bank of the Volga, a little away from the city of Nikolaevsk, a huge wooden steam mill of the late XIX - early XX century has been standing for more than a century. It is called the "Pfläumer Mill" in honor of the German settler Friedrich Pfläumer. They say that he built it in 1906, although according to other sources he was only a co-owner and manager.
To be continued in comments...
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🔴 Moscow has many different architectural styles and trends in construction. You can, for example, find a piece of Italy.
Tarasov's mansion is a true oasis of the Italian Renaissance amidst the bustle of Moscow. It was built at the beginning of the 20th century: the project was ordered by Gavriil Tarasov, a Moscow merchant.
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#goodnightall
@StopHating_Russia and start to love!
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A bit of history
The city was officially founded in 1468, although people lived here long before that date. The first settlers were the Sami, an ancient people of the North. Archaeologists find bone needles, arrowheads, and the remains of settlements of the II millennium BC on the islands. Throughout its history, Sortavala has changed hands more than once: from Russia to Sweden, back to Russia, then to Finland and back again. Each era has left its traces in the appearance of the city.
To be continued in comments...
#мирбезвойны
#русскаяистория
#русскаяархитектура
#worldwithoutwar
#russianhistory
#russianarchitecture
#goodnightall
@StopHating_Russia and start to love!