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welcome to python org notice this page displays a fallback because interactive scripts did not run possible causes include disabled javascript or failure to load scripts or stylesheets skip to content close python psf docs pypi jobs community the python network donate menu search this site go a a smaller larger reset socialize linkedin mastodon chat on irc twitter about applications quotes getting started help downloads all releases source code windows macos android ios other platforms license alternative implementations documentation docs audio visual talks beginner s guide faq non english docs pep index python books python essays community diversity mailing lists irc forums psf annual impact report python conferences special interest groups python logo python wiki code of conduct community awards get involved shared stories success stories arts business education engineering government scientific software development news python news psf newsletter psf news pycon us news python insider news from the community events python events user group events python events archive user group events archive submit an event _ launch interactive shell write fibonacci series up to n def fib n a b 0 1 while a n print a end a b b a b print fib 1000 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 functions defined the core of extensible programming is defining functions python allows mandatory and optional arguments keyword arguments and even arbitrary argument lists more about defining functions for loop on a list numbers 2 4 6 8 product 1 for number in numbers product product number print the product is product the product is 384 all the flow you d expect python knows the usual control flow statements that other languages speak if for while and range with some of its own twists of course more control flow tools list comprehensions fruits banana apple lime loud_fruits fruit upper for fruit in fruits print loud_fruits banana apple lime list and the enumerate function list enumerate fruits 0 banana 1 apple 2 lime compound data types lists known as arrays in other languages are one of the compound data types that python understands lists can be indexed sliced and manipulated with other built in functions more about lists simple arithmetic 1 2 0 5 2 3 8 17 3 true division returns a float 5 666666666666667 17 3 floor division 5 intuitive interpretation calculations are simple with python and expression syntax is straightforward the operators and work as expected parentheses can be used for grouping more about simple math functions simple output with unicode print hello i m python hello i m python input assignment name input what is your name n print f hi name what is your name python hi python quick easy to learn experienced programmers in any other language can pick up python very quickly and beginners find the clean syntax and indentation structure easy to learn whet your appetite with our python overview python is a programming language that lets you work quickly and integrate systems more effectively learn more get started whether you re new to programming or an experienced developer it s easy to learn and use python start with our beginner s guide download python source code and installers are available for download for all versions latest python 3 15 0 docs documentation for python s standard library along with tutorials and guides are available online docs python org jobs looking for work or have a python related position that you re trying to hire for our relaunched community run job board is the place to go jobs python org latest news more news 2026 10 10 psf news board inaugural python packaging council election results strategic plan and pypi security 2026 10 09 python 3 15 0 final is here 2026 10 07 psf news board inaugural python packaging council election results strategic plan and pypi security 2026 10 02 python 3 15 0 candidate 3 is here 2026 10 01 python 3 10 22 3 11 17 3 12 15 3 13 16 and 3 14 8 are now available upcoming events more 2026 10 12 pycon greece 2026 2026 10 15 pycon nl 2026 2026 10 17 pycon ireland 2026 2026 10 17 pycon taiwan 2026 10 22 pycon panamá 2026 success stories more python programmability on algorand makes the entire development lifecycle easier and means more affordable and efficient maintenance and upgrades going forward using python to build a solution for instant tokenized real estate redemptions by brian whippo head of developer relations algorand foundation use python for more web development django pyramid bottle tornado flask litestar fastapi gui development tkinter pygobject pyqt pyside kivy wxpython dearpygui ai and machine learning pytorch tensorflow scikit learn transformers anthropic langchain scientific and numeric scipy pandas ipython software development buildbot trac roundup system administration ansible salt openstack xonsh python software foundation the mission of the python software foundation is to promote protect and advance the python programming language and to support and facilitate the growth of a diverse and international community of python programmers learn more become a member donate to the psf back to top about applications quotes getting started help downloads all releases source code windows macos android ios other platforms license alternative implementations documentation docs audio visual talks beginner s guide faq non english docs pep index python books python essays community diversity mailing lists irc forums psf annual impact report python conferences special interest groups python logo python wiki code of conduct community awards get involved shared stories success stories arts business education engineering government scientific software development news python news psf newsletter psf news pycon us news python insider news from the community events python events user group events python events archive user group events archive submit an event contributing developer s guide issue tracker python dev list core 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