A 'ConnectionError' in Python usually indicates issues with network connectivity. Check your internet connection, ensure the target server is reachable, and verify the correctness of the URL you're trying to access.

Encountering a 'ConnectionError' in Python can be frustrating, especially when working with web applications or APIs. This error typically indicates a failure to establish a connection to a server, which can occur for several reasons. Start by verifying your internet connection; ensure that you are connected and able to access other websites or services. If your connection is stable, the next step is to check the URL you are trying to access for correctness. A typo in the URL or an incorrect endpoint can lead to connection issues. Additionally, ensure that the server you are attempting to reach is online and responsive. You can do this by using tools like ping or curl to test the server's availability. If you are using libraries like requests, consider increasing the timeout settings for your requests to allow for slower server responses. Moreover, firewalls or security settings on your network or the server can also block connections; review these configurations if issues persist. By systematically addressing these aspects, you can effectively troubleshoot and resolve ConnectionErrors in your Python applications.