Python 3.4 is a version of the popular programming language Python, released in March 2014. It introduced several new features, including the asyncio module for asynchronous programming, which allows developers to write concurrent code using the async/await syntax. This version also improved the statistics module, making it easier to perform statistical calculations. Additionally, Python 3.4 included enhancements to the standard library, such as better support for SSL and TLS in network programming. It also provided improved error messages and performance optimizations, making it a more efficient choice for developers. However, it is important to note that Python 3.4 reached its end of life in March 2019, meaning it no longer receives updates or support.