How to use poolmanager() in urllib3.

share link

by dot icon Updated: Nov 8, 2023

technology logo
technology logo

Solution Kit Solution Kit  

urllib3 is a Python library that provides flexible HTTP requests. The Pool Manager is a crucial component of urllib3 that manages a pool of HTTP connections.

It allows you to efficiently make multiple HTTP requests to one or more hosts and reuse them. It minimizes the overhead of establishing new connections for each request. 


Features in Urllib3:

  1. Connection Pooling: The primary function of the Pool Manager is connection pooling. It allows you to maintain a pool of HTTP connections to one or more hosts. This reduces the overhead of creating and closing connections for each request. 
  2. Connection Reuse: Connections are automatically reused within the pool for subsequent requests host. This is especially useful when making multiple requests to a single server. It saves time and resources by avoiding the need to establish a new connection for each request. 
  3. Max Connections per Host: You can configure the maximum number of connections host. This helps prevent overloading a server with too many simultaneous connections. 
  4. Timeouts and Retries: urllib3 allows you to set a connection and request timeouts. It controls the number of retries in case of network errors or timeouts. This feature ensures more robust and reliable interactions with web services. 
  5. Proxy Support: The Pool Manager supports making requests through HTTP proxies. You can configure proxy settings to route requests through a proxy server. It is essential for scenarios where you need to access the internet. 
  6. Connection Pooling with Thread Safety: urllib3 designs to be thread safe. The Pool Manager ensures that connections are correctly managed and shared among threads. 
  7. SSL/TLS Support: Pool Manager provides secure handling of SSL/TLS connections. It includes certificate validation and customization of security options. This ensures that your HTTPS connections are secure and trusted. 
  8. Redirect Handling: urllib3 can automatically follow HTTP redirects, simplifying the process of handling. You can configure the maximum number of redirects to follow. 


In conclusion, the Pool Manager in urllib3 is a valuable tool for performance. By efficiently managing HTTP connections and handling various network-related challenges. It provides customization, simplifies making HTTP requests, and ensures that your application. It can operate effectively in a variety of environments. Using urllib3 and its Pool Manager is a best practice for optimal performance. Whether you're building a web scraper, interacting with APIs, or accessing remote resources.

Fig: Preview of the output that you will get on running this code from your IDE.


In this solution we are using urllib3 library of Python.


Follow the steps carefully to get the output easily.

  1. Download and Install the Jupyter Notebook on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Create a new Python file on your Notebook.
  4. Copy the snippet using the 'copy' button and paste it into your Python.
  5. Run the current file to generate the output.

I hope you found this useful.

I found this code snippet by searching for 'Python 3 Multiprocessing pool' in Kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. Jupyter Notebook (anaconda 3) 6.0.1 Version
  2. The solution is created in Python 3.8 Version
  3. urllib 3 2.0.7 Version.

Using this solution, we can be able to use pool manager () in urllib3 with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to use pool manager () in urllib3.

Dependent Library

urllib3by urllib3

Python doticonstar image 3420 doticonVersion:2.0.3doticon
License: Permissive (MIT)

urllib3 is a user-friendly HTTP client library for Python


            urllib3by urllib3

            Python doticon star image 3420 doticonVersion:2.0.3doticon License: Permissive (MIT)

            urllib3 is a user-friendly HTTP client library for Python