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The programming language is currently being used by a number of high-traffic websites including Google, Yahoo Groups, Yahoo Maps, Linux Weekly News, Shopzilla and Web Therapy. Likewise, Python also finds great use for creating gaming, financial, scientific and educational applications. However, developers still use different versions of the programming language. According to the usage statistics

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and market share data of Python posted on W3techs, currently Python 2 is being used by 99.4% of websites, whereas Python 3 is being used only by 0.6% of websites. That is why, it becomes essential for each programmer to understand different versions of Python, and its evolution over many years.

Despite being one of the most popular coding languages of 2015, Python was originally conceived by Guido van Rossum as a hobby project in December 1989. As Van Rossum's office remained closed during Christmas, he was looking for a hobby project that will keep him occupied during the holidays. He planned to create an interpreter for a new scripting language, and named the project as Python. Thus, Python was originally designed as a successor to ABC programming language. After writing the interpreter, Van Rossum made the code public in February 1991. However, at present the open source programming language is being managed by the Python Software Foundation.

Python 1.0 was released in January 1994. The major release included a number of new features and functional programming tools including lambda, filter, map and reduce. The version 1.4 was released with several new features like keyword arguments, built-in support for complex numbers, and a basic form of data hiding. The major release was followed by two minor releases, version 1.5 in December 1997 and version 1.6 in September 2000. The version 1 of Python lacked the features offered by popular programming languages of the time. But the initial versions created a solid foundation for development of a powerful and futuristic programming language.

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In October 2000, Python 2.0 was released with the new list comprehension feature and a garbage collection system. The syntax for the list comprehension feature was inspired by other functional programming languages like Haskell. But Python 2.0, unlike Haskell, gave preference to alphabetic keywords over punctuation characters. Also, the garbage collection system effectuated collection of reference cycles. The major release was followed by several minor releases. These releases added a number of functionality to the programming language like support for nested scopes, and unification of Python's classes and types into a single hierarchy. The Python Software Foundation has already announced that there would be no Python 2.8. However, the Foundation will provide support to version 2.7 of the programming language till 2020.