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| import concurrent.futures | |
| import urllib.request | |
| from time import sleep | |
| URLS = ['http://www.foxnews.com/', | |
| 'http://www.cnn.com/', | |
| 'http://europe.wsj.com/', | |
| 'http://www.bbc.co.uk/', | |
| 'http://some-made-up-domain.com/'] | |
| def load_url(url, timeout): | |
| with urllib.request.urlopen(url, timeout=timeout) as conn: | |
| if url == 'http://www.cnn.com/': | |
| sleep(10) | |
| return conn.read() | |
| if __name__ == "__main__": | |
| with concurrent.futures.ThreadPoolExecutor(max_workers=5) as executor: | |
| future_to_url = {executor.submit(load_url, url, 60): url for url in URLS} | |
| for future in concurrent.futures.as_completed(future_to_url): | |
| url = future_to_url[future] | |
| try: | |
| data = future.result() | |
| except Exception as exc: | |
| print(f'{url} generated an exception: {exc}\n') | |
| else: | |
| print(f'{url} page size is {len(data)} bytes') | |
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