urllib Connection Pool in Python

Feb 8, 2024 ยท 1 min read

When making multiple requests to a web server using Python's urllib module, it's best practice to use a connection pool rather than opening a new connection for every request.

Here's a quick example:

import urllib.request

http = urllib.request.PoolManager()

response1 = http.request('GET', 'http://example.com/')
response2 = http.request('GET', 'http://example.org/') 

This creates a pool manager that reuses connections rather than closing and reopening new ones. Some key benefits:

  • Performance: Reusing connections is faster than establishing new handshakes repeatedly.
  • Resource efficiency: Limits number of concurrent connections to a domain.
  • Thread safety: The pool handles thread locking seamlessly.
  • Behind the scenes, the pool handles the connections for you. When you're done, simply close the pool:

    http.clear() 

    So in summary, using a connection pool is an easy way to boost efficiency and speed when making multiple requests in urllib. Give it a try next time!

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