«Распараллелить» выполнение функции

import requests
from weblib.text import normalize_space
from lxml import html
# from multiprocessing.dummy import Pool
 
links = [
    'https://www.python.org/downloads/release/python-343/',
    'http://pythonworld.ru/samouchitel-python',
    'http://pythonworld.ru/', 'http://python.su/',
    'https://www.codecademy.com/learn/python',
    'https://ru.coursera.org/specializations/python',
    'https://www.codeschool.com/learn/python'
]
headers = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0'}
 
# pool = Pool(2)
 
 
def foo():
    snippets = set()
    for link in links:
        try:
            req_link = requests.get(link, headers=headers, timeout=5)
            if req_link.status_code == 200:
                resp_link = html.fromstring(req_link.content)
                snippets_with_htmls = resp_link.xpath("//meta[@name='description']/@content")
                for i in snippets_with_htmls:
                    snippets.add(i.strip('.’… \n\xa0'))
        except Exception as e:
            print(e)
            continue
    res = []
    piece = ''
    for line in snippets:
        piece += (line + '. ')
        if len(piece) >= 100:
            res.append(piece.lstrip('. ').rstrip(' '))
            piece = ''
 
    text = '<p>' + '</p>\n<p>'.join(res) + '</p>'
    return normalize_space(text)
 
if __name__ == '__main__':
    # with pool as p:
    #     result = p.map(foo, links)
    #     print(result)
    print(foo())

...
from multiprocessing import Pool
...
 
def foo(link):
    ...
 
if __name__ == '__main__':
    with Pool(processes=2) as pool:
        result = pool.map(foo, links)
        print(result)

def foo(link):
...
    res = []
    piece = ''
    for line in snippets:
        piece += (line + '. ')
        if len(piece) >= 100:
            res.append(piece.lstrip('. ').rstrip(' '))
            piece = ''
    res.append(piece)
    text = '<p>' + '</p>\n<p>'.join(res) + '</p>'

if __name__ == '__main__':
    with Pool(processes=2) as pool:
        result = pool.map(foo, links)
        print('<p>' + '</p>\n<p>'.join(result) + '</p>')

['The official home of the Python Programming Language', 'Самоучитель языка программирования Python для изучения Python с нуля, собранный из материалов сайта [url]http://pythonworld.ru[/url]', 'Уроки программирования Python 3 для начинающих и чайников, справочник и документация Python 3', '', '', 'Take free online classes from 140+ top universities and educational organizations. We partner with schools like Stanford, Yale, Princeton, and others to offer courses in dozens of topics, from computer science to teaching and beyond. Whether you are pursuing a passion or looking to advance your career, Coursera provides open, free education for everyone', 'Explore what it means to store and manipulate data, make decisions with your program, and leverage the power of Python']

if piece: res.append(piece)

text = ''.join(snippets)