Николай Медведков

from itertools import batched

a = ['A', 123, 'B', 321, 'C', 1234]
b = dict(batched(a, 2))

1. NewPromiseResolveThenableJob, который вызывает then() на том уже отресолвленном промисе, что вернули в C1. И т.к. этот промис уже отресолвлен, сразу же в очередь вставляется следующий микротаск:
   
2. NewPromiseReactionJob этого уже разрешенного промиса, и этот, в свою очередь, добавляет третью микрозадачу:
   
3. ещё одну NewPromiseReactionJob, которая уже выводит в лог "2".
   

const log = (value, returnPromise) => () => {
  console.log(value);
  if (returnPromise) return Promise.resolve();
};

Promise.resolve()
  .then(log('a1'))
  .then(log('a2'))
  .then(log('a3'))
  .then(log('a4'))
  .then(log('a5'))
  .then(log('a6'))
;

Promise.resolve()
  .then(log('b1'))
  .then(log('b2'))
  .then(log('b3'))
  .then(log('b4'))
  .then(log('b5'))
  .then(log('b6'))
;

Promise.resolve()
  .then(log('a1', true))
  .then(log('a2'))
  .then(log('a3'))
  .then(log('a4'))
  .then(log('a5'))
  .then(log('a6'))
;

Promise.resolve()
  .then(log('b1'))
  .then(log('b2'))
  .then(log('b3'))
  .then(log('b4'))
  .then(log('b5'))
  .then(log('b6'))
;

"молния"
a1 b1 ; a2 b2 ; a3 b3 ; a4 b4 ; a5 b5 ; a6 b6

с промисом в А1
a1 b1 ; b2 ; b3 a2 ; b4 a3 ; b5 a4 ; b6 a5 ; a6

const output = [];

const makeChain = (key, n = 5, trueStep = false) => {
  let p = Promise.resolve();
  const arrow = isArrow => isArrow ? '->' : '';
  for (let i = 1; i <= n; i++) {
    const returnPromise = trueStep === i;
    const afterPromise = trueStep === i - 1;
    p = p.then(() => {
      output.push(`${arrow(afterPromise)}${key}${i}${arrow(returnPromise)}`);
      if (returnPromise) return Promise.resolve();      
    });
  }
  return p.catch(console.error);
};

const n = 7;
makeChain('a', n, 1),
makeChain('b', n),
makeChain('c', n, 4),

// мАкрозадача выполнится после всех мИкрозадач:
setTimeout(() => console.log(output.join(' ')));

a1-> b1 c1 ; b2 c2 ; b3 c3 ->a2 ; b4 c4-> a3 ; b5 a4 ; b6 a5 ; b7 ->c5 a6 c6 ; a7 c7

const parent = document.querySelector('.parent');
const toWrapClass = 'child';
const wrapperTag = 'div';
const wrapperClass = 'wrapper';

[...parent.children].reduce((wrapper, n) => {
  if (n.classList.contains(toWrapClass)) {
    if (!wrapper) {
      wrapper = document.createElement(wrapperTag);
      wrapper.classList.add(wrapperClass);
      n.before(wrapper);
    }
    wrapper.appendChild(n);
    return wrapper;
  }
  return null;
}, null);

Array.prototype.reduce.call(
  parent.querySelectorAll(`:scope > .${toWrapClass}`),
  (acc, n, i, a) => (
    n.previousElementSibling !== a[i - 1] && acc.push([]),
    acc.at(-1).push(n),
    acc
  ),
  []
).forEach(n => {
  const wrapper = document.createElement(wrapperTag);
  wrapper.className = wrapperClass;
  parent.insertBefore(wrapper, n[0]);
  wrapper.append(...n);
});

const toWrapSelector = `.${toWrapClass}`;
const wrapperHTML = `<${wrapperTag} class="${wrapperClass}"></${wrapperTag}>`;
for (
  let curr = parent.firstElementChild, next = null, prev = null, wrapper = null;
  next = curr?.nextElementSibling, curr;
  prev = curr, curr = next
) {
  if (!curr.matches(toWrapSelector)) {
    continue;
  }
  if (!prev?.matches(toWrapSelector)) {
    curr.insertAdjacentHTML('beforebegin', wrapperHTML);
    wrapper = curr.previousSibling;
  }
  wrapper.insertAdjacentElement('beforeend', curr);
}

Выдаёт ошибку:
Traceback (most recent call last):
line 46, in
for m in n.values():
AttributeError: 'int' object has no attribute 'values'

Подскажите как посчитать сумму элементов в данном словаре

def best_function(d):
    sum = 0
    for v in d.values():
        if isinstance(v, dict):
            sum += best_function(v)
        else:
            sum += v
    return sum

print(best_function(dct)) # 3906

import subprocess
from time import sleep

class CameraMonitor:
    def __init__(self):
        self.IP12 = '192.168.0.100'
        self.IP13 = '192.168.0.101'
        self.RODOS12 = '192.168.1.100'
        self.RODOS13 = '192.168.1.101'
        
        self.fail_count = {'Купол 12': 0, 'Купол 13': 0}
        self.reboot_count = {'Купол 12': 0, 'Купол 13': 0}

    def ping_camera(self, ip):
        cmd = f'ping {ip} -n 1 -w 100'
        response = subprocess.call(cmd, stdout=subprocess.DEVNULL)
        return response == 0

    def cameras_checker(self):
        r_dict = {'Купол 12': self.IP12, 'Купол 13': self.IP13}
        while True:
            for camera, ip in r_dict.items():
                if self.ping_camera(ip):
                    print(f'Camera {camera} - OK')
                    self.fail_count[camera] = 0
                else:
                    self.fail_count[camera] += 1
                    print(f'Camera {camera} - Died')

                    if self.fail_count[camera] >= 5:
                        self.cameras_reboot(camera)

            sleep(5)

    def cameras_reboot(self, camera):
        if camera == 'Купол 12':
            ip = self.RODOS12
        else:
            ip = self.RODOS13
        
        self.reboot_count[camera] += 1 
        print(f'Rebooting {camera} at IP {ip}')

    def info(self):
        for camera, count in self.reboot_count.items():
            print(f'Перезагрузок {camera}: {count}')


if __name__ == "__main__":
    monitor = CameraMonitor()
    monitor.cameras_checker()

def get_contact(ids):
    for id in ids:
        template = f'https://etender.gov.az/api/events/{id}/contact-persons'
        try:
            response = requests.get(template, timeout=20)
            if response.status_code == 200:
                data_list = response.json()
                for data in data_list:
                    main_data['Full_name'].append(data.get('fullName', 'None') if data.get('fullName') else 'None')
                    main_data['Contact'].append(data.get('contact', 'None') if data.get('contact') else 'None')
                    main_data['Position'].append(data.get('position', 'None') if data.get('position') else 'None')
                    main_data['Phone_number'].append(data.get('phoneNumber', 'None') if data.get('phoneNumber') else 'None')

            else:
                main_data['Full_name'].append('None')
                main_data['Contact'].append('None')
                main_data['Position'].append('None')
                main_data['Phone_number'].append('None')
        except requests.Timeout:
            main_data['Full_name'].append('None')
            main_data['Contact'].append('None')
            main_data['Position'].append('None')
            main_data['Phone_number'].append('None')

main_data = []
...

def get_contact(ids):
    for id in ids:
    	current_data = {'Full_name': 'None', 'Contact': 'None', 'Position': 'None',  'Phone_number': 'None'}
        template = f'https://etender.gov.az/api/events/{id}/contact-persons'
        try:
            response = requests.get(template, timeout=20)
            if response.status_code == 200:
                data_list = response.json()
                for (elem_to, elem_from) in [
                     ('Full_name', 'fullName'),
                     ('Contact', 'contact'),
                     ('Position', 'position'),
                     ('Phone_number', 'phoneNumber')
                ]:
                	current_data[elem_to] = data.get(elem_from, 'None')
         except requests.Timeout:
               pass
        main_data.append(current_data)