download.py

download.py

from urllib.request import urlopen

def download(url, file):
    with urlopen(url) as url, open(file, 'wb') as f:
        f.write(url.read())

urls = [
    'http://openhome.cc/Gossip/Encoding/',
    'http://openhome.cc/Gossip/Scala/',
    'http://openhome.cc/Gossip/JavaScript/',
    'http://openhome.cc/Gossip/Python/'
]
        
filenames = [
    'Encoding.html',
    'Scala.html',
    'JavaScript.html',
    'Python.html'
]

for url, filename in zip(urls, filenames):
    download(url, filename)

# threading
'''
import threading
from urllib.request import urlopen

def download(url, file):
    with urlopen(url) as url, open(file, 'wb') as f:
        f.write(url.read())

urls = [
    'http://openhome.cc/Gossip/Encoding/',
    'http://openhome.cc/Gossip/Scala/',
    'http://openhome.cc/Gossip/JavaScript/',
    'http://openhome.cc/Gossip/Python/'
]

filenames = [
    'Encoding.html',
    'Scala.html',
    'JavaScript.html',
    'Python.html'
]

for url, filename in zip(urls, filenames):
    t = threading.Thread(target=download, args=(url, filename))
    t.start()
'''

# concurrent.futures
'''
from urllib.request import urlopen
from concurrent.futures import ThreadPoolExecutor

def download(url, file):
    with urlopen(url) as url, open(file, 'wb') as f:
        f.write(url.read())


urls = [
    'http://openhome.cc/Gossip/Encoding/',
    'http://openhome.cc/Gossip/Scala/',
    'http://openhome.cc/Gossip/JavaScript/',
    'http://openhome.cc/Gossip/Python/'
]

filenames = [
    'Encoding.html',
    'Scala.html',
    'JavaScript.html',
    'Python.html'
]

with ThreadPoolExecutor(max_workers=4) as executor:
    for url, filename in zip(urls, filenames):
        executor.submit(download, url, filename)
'''

# asyncio
'''
from urllib.request import urlopen
import asyncio

async def download(url, file):
    with urlopen(url) as url, open(file, 'wb') as f:
        f.write(url.read())

urls = [
    'http://openhome.cc/Gossip/Encoding/',
    'http://openhome.cc/Gossip/Scala/',
    'http://openhome.cc/Gossip/JavaScript/',
    'http://openhome.cc/Gossip/Python/'
]

filenames = [
    'Encoding.html',
    'Scala.html',
    'JavaScript.html',
    'Python.html'
]

loop = asyncio.get_event_loop()
tasks = [loop.create_task(download(url, filename)) for url, filename in zip(urls, filenames)]
loop.run_until_complete(asyncio.wait(tasks))
'''