Библиотека Python разработчика | Книги по питону
Погружение в CPython и архитектуру. Разбираем неочевидное поведение (GIL, Memory), Best Practices (SOLID, DDD) и тонкости Django/FastAPI. Решаем задачи с подвохом и оптимизируем алгоритмы. 🐍 По всем вопросам @evgenycarter РКН clck.ru/3Ko7Hq
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Библиотека Python разработчика | Книги по питону (@bookpython) Rus til segmentidagi kanali faol ishtirokchi. Hozirda hamjamiyat 17 959 obunachidan iborat bo'lib, Texnologiyalar & Aralashmalar toifasida 7 250-o'rinni va Rossiya mintaqasida 36 565-o'rinni egallagan.
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“Погружение в CPython и архитектуру. Разбираем неочевидное поведение (GIL, Memory), Best Practices (SOLID, DDD) и тонкости Django/FastAPI. Решаем задачи с подвохом и оптимизируем алгоритмы. 🐍
По всем вопросам @evgenycarter
РКН clck.ru/3Ko7Hq”
Yuqori yangilanish chastotasi (oxirgi ma’lumot 05 Noyabr, 2026 da olingan) sababli kanal doimo dolzarb va katta qamrovli bo‘lib qoladi. Analitika auditoriya kontent bilan faol hamkorlik qilishini, uni Texnologiyalar & Aralashmalar toifasidagi muhim ta’sir nuqtasiga aylantirishini ko‘rsatadi.
sorted:
In : sorted([1, -1, 2, -3, 3])
Out: [-3, -1, 1, 2, 3]
With the key argument you can provide a function that will be used to get a comparison key of each value. Let's sort the same sequence by absolute values:
In : sorted([1, -1, 2, -3, 3], key=abs)
Out: [1, -1, 2, -3, 3]
Let's suppose we also want to put the numbers with the same absolute value in ascending order. In that case, we can provide a tuple as a comparison key:
In : sorted([1, -1, 2, -3, 3], key=lambda x: (abs(x), x))
Out: [-1, 1, 2, -3, 3]
This is not some sorted magic, this is how tuples are sorted in general:
In : (1, 2) == (1, 2)
Out: True
In : (1, 2) > (1, 1)
Out: True
In : (1, 2) < (2, 1)
Out: True-O and -OO flags.
-O sets __debug__ to False and removes all assert statements from the program. -OO do the same and also discards docstrings.
A regular version of a script is cached to .pyc file while an optimized one is cached to .pyo. However, since Python 3.5 .pyo is no more a thing, .opt-1.pyc and .opt-2.pyc are introduced by PEP 488 instead.float.
Float также можно использовать для преобразования целых чисел в числа с плавающей запятой.
В Python 2 такое преобразование необходимо, но в Python 3 целочисленное деление больше не является чем-то особенным (если вы специально не используете оператор «//»). Поэтому больше не нужно использовать float для этой цели, теперь float(x)/y можно легко заменить на x/y.
Подписывайтесь на канал 👉@pythonofffpython -m module.py, that prevents the traditional if __name__ == '__main__' block from running. Still, all imports will be executed, and this may fail if you want to check syntax in the environment where the module can't be and shouldn't be run.
However, the python standard library contains the py_compile module that generates byte-code from Python source file without running it. That's exactly what we need:
$ python -m py_compile test.c
File "test.c", line 1
int main() {
^
SyntaxError: invalid syntax.d = {} (for dictionaries) but it's not exactly clearing, it's creating a new collection and throwing the old one away. It may work for you, but other owners of the same object will still have a reference to the original one.
The proper way to clear dictionary, set, deque and other collections is to call x.clear().obj.x is a call of the x method. In Java, it's recommended to make all attributes private and write trivial getters instead: public int getX() { return this.x }.
Python offers a solution that is somehow similar to that that Ruby has. You can define property so obj.x invokes a method instead of returning the x attribute directly.
class Example:
def __init__(self, x):
self._x = x
@property
def x(self):
return self._xarray = [1, 2, 3, 4, 5, 6, 7, 8, 9]
print(array[::2])
# Вывод : [1, 3, 5, 7, 9]
Подписывайтесь на канал 👉@pythonofff