Станислав Некрасов

$result = array_map(fn($n) => implode(',', $n), array_chunk(explode(',', $str), 2));

preg_match_all('~[^,]+,[^,]+~', $str, $match);
$result = $match[0];

if dot == colors_cells[-1]:
    all_users[name]['mass'] -= 0.5

https:\/\/domen\.ru\/wp-content\/uploads\/(.*?)\.png

with open(file, 'r') as f:
    lines = f.readlines()

new = [line for line in lines if len(line) < 20]

with open('myfile.txt', 'r', encoding='utf-8') as f:
    lines = f.readlines()

new = [line for line in lines if line.count(';') >= 6]
print(new)

driver.get('data:text/html;charset=utf-8,{}'.format(page))

class Person:
    name = "Кристи"
    age = 10

    def __init__(self, name, age):
        self.name = name
        self.age = age

    def set(self, name, age):
        self.name = name
        self.age = age

ivan = Person('Иван', 33)

const containerSelector = '.card_options > div';
const itemSelector = '.option';
const activeClass = 'checked';
const toggleItem = item => item
  ?.closest(containerSelector)
  .querySelectorAll(itemSelector)
  .forEach(n => n.classList[n === item ? 'toggle' : 'remove'](activeClass));


// можно добавить обработчик клика каждому элементу индивидуально
document.querySelectorAll(itemSelector).forEach(function(n) {
  n.addEventListener('click', this);
}, e => toggleItem(e.currentTarget));

// а можно один раз - делегированный, всей странице
document.addEventListener('click', e => {
  toggleItem(e.target.closest(itemSelector));
});

al=[0,1,2,0,3,2,0,2]
al=[x for ind,x in enumerate(al) if x!=0]

Out[12]: [1, 2, 3, 2, 2]

for i in [ind for ind,x in enumerate(al) if x==0][::-1]:
        del al[i]