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Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience. 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 * Sign In * Sign Up / Register * Sign In * About * Applications * Quotes * Getting Started * Help * Python Brochure * PYTHON IS A PROGRAMMING LANGUAGE THAT LETS YOU WORK MORE QUICKLY AND INTEGRATE YOUR SYSTEMS MORE EFFECTIVELY. You can learn to use Python and see almost immediate gains in productivity and lower maintenance costs. Learn more about Python. * Downloads * All releases * Source code * Windows * macOS * Other Platforms * License * Alternative Implementations * PYTHON SOURCE Python 3.12.4 Not the OS you are looking for? Python can be used on many operating systems and environments. View the full list of downloads. DOWNLOAD FOR WINDOWS Python 3.12.4 Note that Python 3.9+ cannot be used on Windows 7 or earlier. Not the OS you are looking for? Python can be used on many operating systems and environments. View the full list of downloads. DOWNLOAD FOR MACOS Python 3.12.4 Not the OS you are looking for? Python can be used on many operating systems and environments. View the full list of downloads. DOWNLOAD PYTHON FOR ANY OS Python can be used on many operating systems and environments. View the full list of downloads * Documentation * Docs * Audio/Visual Talks * Beginner's Guide * Developer's Guide * FAQ * Non-English Docs * PEP Index * Python Books * Python Essays * PYTHON’S STANDARD DOCUMENTATION: DOWNLOAD, BROWSE OR WATCH A TUTORIAL. Get started below, or visit the Documentation page to browse by version. Python Docs * 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 * THE PYTHON COMMUNITY Great software is supported by great people. Our user base is enthusiastic, dedicated to encouraging use of the language, and committed to being diverse and friendly. * Success Stories * Arts * Business * Education * Engineering * Government * Scientific * Software Development * > "Python is all about automating repetitive tasks, leaving more time for > your other SEO efforts." Marnix de Munck, Sooda internetbureau * News * Python News * PSF Newsletter * PSF News * PyCon US News * News from the Community * Events * Python Events * User Group Events * Python Events Archive * User Group Events Archive * Submit an Event * Find events from the Python Community around the world! * >_ Launch Interactive Shell * # Python 3: 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 in Python 3 * # Python 3: 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 in Python 3 * # Python 3: Simple arithmetic >>> 1 / 2 0.5 >>> 2 ** 3 8 >>> 17 / 3 # classic 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 in Python 3. * # 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 in Python 3 * # Simple output (with Unicode) >>> print("Hello, I'm Python!") Hello, I'm Python! # Input, assignment >>> name = input('What is your name?\n') What is your name? Python >>> print(f'Hi, {name}.') 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 3 overview. 1. 1 2. 2 3. 3 4. 4 5. 5 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 3.12.4 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 * 2024-06-14 The Python Language Summit 2024: PyREPL -- New default REPL written in Python * 2024-06-14 The Python Language Summit 2024 * 2024-06-14 The Python Language Summit 2024: Should we make pdb better? * 2024-06-14 The Python Language Summit 2024: Lightning Talks * 2024-06-14 The Python Language Summit 2024: Annotations as Transformers UPCOMING EVENTS More * 2024-06-19 NZPUG-Auckland: Data Science: Pandas and PyArrow * 2024-06-20 Wagtail Space US * 2024-06-22 PyCamp Leipzig 2024 * 2024-06-25 PyLadies Amsterdam: Introduction to LLM Agents with LangChain * 2024-06-29 North Bay Python 2024 SUCCESS STORIES More > Prioritizing cutting-edge speed and supporting the rapid growth of Hudson > River Trading’s codebase can have unintended effects that require innovative > solutions. For those working on our Python codebase, this means addressing > “code tangling,” the coupling of unrelated code through unintuitive import > cycles. In this article, George Farcasiu, Noah Kim, Jacob Brugh, and Jiahao Li > discuss how they mitigate the cost and time burden of this issue by creating > new tools to analyze and untangle dependencies efficiently. Building a Dependency Graph of Our Python Codebase by George Farcasiu, Noah Kim, Jacon Brugh, Jiahao Li USE PYTHON FOR… More * Web Development: Django, Pyramid, Bottle, Tornado, Flask, web2py * GUI Development: tkInter, PyGObject, PyQt, PySide, Kivy, wxPython, DearPyGui * Scientific and Numeric: SciPy, Pandas, IPython * Software Development: Buildbot, Trac, Roundup * System Administration: Ansible, Salt, OpenStack, xonsh >>> PYTHON ENHANCEMENT PROPOSALS (PEPS): THE FUTURE OF PYTHON IS DISCUSSED HERE. RSS >>> 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. 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