my_list = []

for i in range(4):

my_list.append(i)

my_list = [i for i in range(4)]

my_dict = []

for i in range(4):

my_dict.append(i)

names = ['Alice', 'Bob', 'Claire']

aliases = ['Angel', 'Bobo', 'Clack']

my_dict = {name: alias for name, alias in zip(names, aliases)}

my_set = set([i for i in range(4)])

for i in range(4):

yield i

my_generator = (i for i in range(4))

Iterators are objects with __iter__() and __next__() methods.

The itertools module helps you efficiently loop through iterables.

import itertools

counter = itertools.count()

Beautiful Soup makes it easy to parse HTML.

pip install beautifulsoup4

pip install lxml

pip install html5lib

pip install requests

from bs4 import BeautifulSoup

import requests

with open('example.html') as html_file:

soup = BeautifulSoup(html_file, 'lxml')

print(soup.prettify())

match = soup.title

print(match)