What are the best practices for using urllib in Python?

What are the best practices for using urllib in Python?

When using urllib in Python, it's important to handle exceptions, use context managers, and validate URLs.

Can you give me an example of how to handle exceptions?

Sure! You can use a try-except block to catch exceptions like this:

import urllib.request

try:
    response = urllib.request.urlopen('http://example.com')
except urllib.error.URLError as e:
    print(f'Error: {e.reason}')

What about validating URLs? How can I do that?

You can use the urlparse module to validate URLs. Here's an example:

from urllib.parse import urlparse

def is_valid_url(url):
    parsed = urlparse(url)
    return all([parsed.scheme, parsed.netloc])

Are there any performance tips for using urllib?

Yes! Use connection pooling with urllib3 for better performance, and consider asynchronous requests for multiple URLs.