Влад Григорьев

import re

input_file = """This is line #aabbcc #ddeeff
This is line #aab66c #ddee44
This is line #aabbcc #cceeff #aa11cc #dd22ff
This is line #aabbcc #ddee00 #dd11ff"""

pattern = re.compile(r'#\w{6}')


def invert(color_to_convert):
    table = "".maketrans('0123456789abcdef', 'fedcba9876543210')
    return color_to_convert.lower().translate(table).upper()


def replace(s: str):
    colors = [invert(color) for color in pattern.findall(s)]
    s = pattern.sub("{}", s)
    return s.format(*colors)


for line in input_file.split('\n'):
    print(replace(line))


This is line #554433 #221100
This is line #554993 #2211BB
This is line #554433 #331100 #55EE33 #22DD00
This is line #554433 #2211FF #22EE00

import asyncio
from time import time

els = list(range(20))


async def rm_list(v):
    await asyncio.sleep(5)
    print(v)


async def _main():
    await asyncio.gather(*(
        rm_list(value) for value in els
    ))


start = time()
loop = asyncio.get_event_loop()
loop.run_until_complete(_main())
loop.close()
print(time() - start)

sells={
...   "Маша":"Samsung 20",
...   "Максим":"Iphone 6S",
...   "Наташа":"Lenovo Legion"
... }
prices={
...   "Samsung 20": 300,
...   "Iphone 6S": 260,
...   "Lenovo Legion": 450
... }
result = [name for name, tel in sells.items() if prices.get(tel, 999) < 350]
>>> print(result)
['Маша', 'Максим']

import re

s = "выставляет на аукцион (214422): 1*Кожаная туника - 900 золота , " \
    "нужно вычленить именно число в скобках, у каждого такого сообщения они каждый раз разные."

lot_re = re.compile(r'\((?P<lot_id>\d+)\)')
result = lot_re.search(s).groupdict()
print(result)

{'lot_id': '214422'}

student_tuples = [
...         ('john', 'A', 15),
...         ('jane', 'B', 12),
...         ('dave', 'B', 10),
...         ('dave1', 'B', 11),
...         ('dave2', 'B', 1),
...     ]
... student_tuples.sort(key=lambda student: (student[1], student[2]))
student_tuples
[('john', 'A', 15), ('dave2', 'B', 1), ('dave', 'B', 10), ('dave1', 'B', 11), ('jane', 'B', 12)]

import asyncio

from aiohttp import ClientSession, ClientError


async def check_url(url):
    async with ClientSession() as s:
        try:
            r = await s.head(url)
            if r.status != 200:
                return url
        except ClientError:
            return f'error {url}'


URLS = [
           'https://ya.ru',
           'https://qna.habr.com/',
           'https://qna.habr1.com/',
       ] * 10


async def _main():
    fails = await asyncio.gather(*(check_url(url) for url in URLS))
    print(fails)


if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(_main())
    loop.close()

from urllib.parse import unquote
unquote('https://www.сайт.ru/moscow?q=%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D0%B4%D0%BB%D1%8F+%D1%87%D1%82%D0%B5%D0%BD%D0%B8%D1%8F')
'https://www.сайт.ru/moscow?q=книга+для+чтения'

или

from urllib.parse import urlparse, parse_qs
v = parse_qs(urlparse('https://www.сайт.ru/moscow?q=%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D0%B4%D0%BB%D1%8F+%D1%87%D1%82%D0%B5%D0%BD%D0%B8%D1%8F').query)
v['q']
['книга для чтения']

t = {
    'type': 'message_new',
    'object': {
        'message': {
            'date': 1587065982,
            'from_id': 396298943,
            'id': 845, 'out': 0,
            'peer_id': 396298943,
            'text': '',
            'conversation_message_id': 329,
            'fwd_messages':
                [{'date': 1587065973, 'from_id': 396298943, 'text': '',
                  'attachments': [], 'fwd_messages':
                      [{'date': 1587065635, 'from_id': 574078662,
                        'text': 'Мда..Вк на приложении сдохло', 'attachments': [],
                        'conversation_message_id': 1887}],
                  'conversation_message_id': 328, 'peer_id': 396298943, 'id': 844}],
            'important': False, 'random_id': 0, 'attachments': [], 'is_hidden': False},
        'client_info': {
            'button_actions': ['text', 'vkpay', 'open_app', 'location', 'open_link'],
            'keyboard': True, 'inline_keyboard': True, 'lang_id': 0}},
    'group_id': 194081345, 'event_id': '919d7461a9d3217cb9f1b9eb50c7b5299571140d'}

# Можно просто
print(t['object']['message']['fwd_messages'])
# Можно не ловя ошибок
print(t.get('object', {}).get('message', {}).get('fwd_messages'))


# Можно обернуть в функцию и скармливать строку
def get_key(obj: dict, path):
    for k in path.split('.'):
        obj = obj.get(k, {})

    return obj


print(get_key(t, 'object.message.fwd_messages'))

from itertools import zip_longest

a = ['one', 'two', None, 'four', None]
b = [None, None, 'three', None, 'five']

# если списки 100% одинаковой длины можно просто zip использовать
c = [x or y for x, y in zip_longest(a, b)]
print(c)