{"id":1685,"library":"python3-openid","title":"python3-openid","description":"python3-openid provides OpenID 1.x and 2.0 support for modern Python 3 servers and consumers. The current version is 3.2.0. The release cadence is slow, focusing on compatibility and maintenance rather than active feature development for new OpenID versions.","status":"active","version":"3.2.0","language":"en","source_language":"en","source_url":"https://github.com/necaris/python3-openid","tags":["openid","authentication","auth","identity","protocol"],"install":[{"cmd":"pip install python3-openid","lang":"bash","label":"Install latest version"}],"dependencies":[],"imports":[{"note":"The 'consumer' module itself holds the Consumer class. Direct import from the module is generally preferred.","wrong":"from openid.consumer.consumer import Consumer","symbol":"Consumer","correct":"from openid.consumer import consumer"},{"note":"Similar to Consumer, the 'server' module holds the Server class.","wrong":"from openid.server.server import Server","symbol":"Server","correct":"from openid.server import server"},{"note":"FileOpenIDStore is within the 'filestore' module of the 'store' package.","wrong":"import openid.store.filestore.FileOpenIDStore","symbol":"FileOpenIDStore","correct":"from openid.store import filestore"}],"quickstart":{"code":"import os\nfrom openid.consumer import consumer\nfrom openid.store import filestore\n\n# Create a file store for nonces and associations (NOT suitable for production)\nstore_path = \"openid_store\"\nos.makedirs(store_path, exist_ok=True)\nstore = filestore.FileOpenIDStore(store_path)\n\n# Initialize the consumer\noid_consumer = consumer.Consumer(store)\n\n# Example: Begin OpenID authentication (conceptual example for a web app flow)\n# In a real web application, this would involve user input and HTTP redirects.\nuser_openid_url = \"https://openid.example.com/user/alice\" # Replace with an actual OpenID Provider URL\n\ntry:\n    # This call prepares an authentication request.\n    # The actual redirect to the OpenID Provider (OP) happens in a web framework.\n    auth_request = oid_consumer.begin(user_openid_url)\n    \n    # Simulate the redirect URL generation (in a real app, this would be returned to the client)\n    return_to_url = 'http://localhost:8000/verify'\n    trust_root = 'http://localhost:8000'\n    \n    print(f\"OpenID authentication initiated for {user_openid_url}\")\n    print(f\"User should be redirected to: {auth_request.redirectURL(return_to_url, trust_root)}\")\n    \nexcept consumer.DiscoveryFailure as e:\n    print(f\"OpenID discovery failed for {user_openid_url}: {e}\")\nexcept Exception as e:\n    print(f\"An unexpected error occurred: {e}\")\n\n# For demonstration purposes, you might clean up the store directory\n# import shutil\n# shutil.rmtree(store_path)\n","lang":"python","description":"This quickstart demonstrates initiating an OpenID consumer authentication flow. It initializes a Consumer object with a file-based store (not for production) and attempts to begin an authentication request for a placeholder OpenID URL. In a real web application, the `auth_request.redirectURL` would be used to redirect the user's browser to the OpenID Provider."},"warnings":[{"fix":"Ensure you are installing `python3-openid` on PyPI for Python 3 projects. Review any direct imports or interactions with the library's internal structure that might have changed between Python 2 and Python 3 standard library behavior.","message":"The `python-openid` library (for Python 2) is distinct from `python3-openid` (for Python 3). While the internal `openid` package namespace is largely consistent, direct dependencies or custom integrations built for Python 2's `python-openid` will require careful migration.","severity":"breaking","affected_versions":"All versions (migration from Python 2)"},{"fix":"For production, implement a custom store (inheriting from `openid.store.interface.OpenIDStore`) that uses a robust database (e.g., PostgreSQL, MySQL) or a distributed key-value store (e.g., Redis). Consider using existing community-contributed store implementations if available for your chosen backend.","message":"The default `openid.store.filestore.FileOpenIDStore` is not suitable for production environments. It lacks support for concurrency, distributed systems, and often requires specific file permissions, making it unreliable for web applications.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Evaluate your project's authentication requirements carefully. If OpenID 2.0 is specifically required for integration with existing providers, this library is appropriate. For new implementations, research OpenID Connect libraries and providers instead.","message":"The OpenID 1.x/2.0 protocol, which `python3-openid` implements, is an older standard. For new authentication needs, consider modern alternatives like OpenID Connect (OIDC), which is built on OAuth 2.0 and offers more features, better security practices, and broader adoption.","severity":"gotcha","affected_versions":"All versions (contextual)"}],"env_vars":null,"last_verified":"2026-04-09T00:00:00.000Z","next_check":"2026-07-08T00:00:00.000Z"}