{"id":15014,"library":"user-agent","title":"user-agent Python Library","description":"The user-agent library (version 0.1.14) is a Python module designed for generating random, valid User-Agent HTTP headers and `window.navigator` JavaScript objects. It's particularly useful for web scraping or testing scenarios where mimicking various browser and device user agents is required. The library is currently in a beta development status, with its last update on September 10, 2025.","status":"active","version":"0.1.14","language":"en","source_language":"en","source_url":"https://pypi.org/project/user-agent/","tags":["user-agent","http","web scraping","generator","browser","navigator"],"install":[{"cmd":"pip install user-agent","lang":"bash","label":"Install stable version"}],"dependencies":[],"imports":[{"symbol":"generate_user_agent","correct":"from user_agent import generate_user_agent"},{"symbol":"generate_navigator","correct":"from user_agent import generate_navigator"}],"quickstart":{"code":"from user_agent import generate_user_agent, generate_navigator\n\n# Generate a random user agent string\nrandom_ua = generate_user_agent()\nprint(f\"Generated User-Agent: {random_ua}\")\n\n# Generate a navigator object (dictionary)\nnavigator_obj = generate_navigator()\nprint(f\"Generated Navigator Object: {navigator_obj}\")\n\n# Example of generating a user agent for a specific OS/browser\nmac_firefox_ua = generate_user_agent(os=('mac',), navigator='firefox')\nprint(f\"Mac Firefox User-Agent: {mac_firefox_ua}\")","lang":"python","description":"This quickstart demonstrates how to generate random user agent strings and navigator objects using `generate_user_agent` and `generate_navigator` functions. It also shows how to filter generation by operating system or navigator type."},"warnings":[{"fix":"Review the project's PyPI page and any potential GitHub repository for updates on stability and breaking changes. Consider locking the dependency version tightly.","message":"The library is currently in 'Development Status :: 4 - Beta', which means its API might not be entirely stable and could undergo changes in future releases. It may not be fully production-ready for critical applications.","severity":"beta","affected_versions":"<=0.1.14"},{"fix":"Ensure you use the correct library for your task: `user-agent` for generation, `user-agents` or `ua-parser` for parsing.","message":"This library is solely for *generating* user agent strings and navigator objects, not for *parsing* an existing user agent string to extract browser, OS, or device information. Attempting to use its functions for parsing will not work. For parsing, consider libraries like `user-agents` (plural) or `ua-parser`.","severity":"gotcha","affected_versions":"All"},{"fix":"Ensure your project runs on Python 3.x. If Python 2.7 is a hard requirement, be aware of the associated risks.","message":"While the package's metadata indicates compatibility with `Python >=2.7`, Python 2.7 has reached its End-of-Life. Using this library in environments that rely on Python 2.7 might introduce compatibility issues or security vulnerabilities in modern projects. It's recommended to use it with Python 3.x.","severity":"gotcha","affected_versions":"All"},{"fix":"For applications requiring highly current user agents (e.g., intensive web scraping), consider combining this library with a regularly updated list of user agents or using libraries like `fake-useragent` that specialize in keeping their user agent database up-to-date.","message":"The `generate_user_agent()` function produces valid, random user agents, but there is no explicit mechanism documented on its PyPI page to ensure these are always the *latest* or most current browser versions. Websites frequently update their anti-bot measures, and using outdated user agents can lead to requests being blocked or flagged.","severity":"gotcha","affected_versions":"All"},{"fix":"Implement a user-agent rotation strategy by calling `generate_user_agent()` for each request or regularly rotating from a list of generated user agents.","message":"A common mistake in web scraping is to generate a single user-agent string and reuse it for all requests. Even a realistic user-agent will eventually get flagged if it makes too many requests from the same IP address in a short period, signaling automated behavior.","severity":"gotcha","affected_versions":"All"}],"env_vars":null,"last_verified":"2026-04-15T00:00:00.000Z","next_check":"2026-07-14T00:00:00.000Z","problems":[],"ecosystem":"pypi"}