Does it look like something which understands the purpose of your code or more like a dumb machine following simple rules? Function callsįunction call is a programming concept which often causes great deal of confusion to beginners. You should see a triangle made of periods appear in the shell pane.Ĭontinue pressing F7 and observe how Python moves forward with really small steps. Copy following program text into the editor and save it into a file (Ctrl+S). When first launching Thonny, it does some preparations and then presents an empty editor and the Python shell.
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Install it with sudo dnf install thonny or with a graphical tool of your choice (such as Software). Thonny is included in Fedora repositories since version 27. Thonny is a beginner-friendly Python IDE, developed in University of Tartu, Estonia, which takes a different approach as its debugger is designed specifically for learning and teaching programming.Īlthough Thonny is suitable for even total beginners, this post is meant for readers who have at least some experience with Python or another imperative language.
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Unfortunately, most debuggers are optimized for professional usage and assume the user already knows the semantics of language constructs (e.g. Programmers usually tackle this situation with a tool called a debugger, which allows running their program step-by-step. Commonly, this means you overlooked something or misunderstood a language construct, and you need to locate the place in the code where your expectations and reality diverge. Even when you finally get your colons and parentheses right, there is still a big chance that the program doesn’t do what you intended. ThonnyFlake8 adds warnings from flake8.Learning to program is hard.thonny-py5mode adds py5 support for a Processing-like creative coding environment.thonny-icontract-hypothesis adds commands for invoking icontract-hypothesis analyzer.thonny-crosshair adds commands for invoking CrossHair analyzer.thonny-onedark adds One Dark syntax theme.thonny-dracula adds Dracula syntax theme.thonny-edison allows uploading Python code to Edison educational robot.thonny-lahendus allows loading exercises from lahendus.ut.ee and submitting solutions for automatic assessment.thonny-error-explainer extends Assistant with new error checkers.thonny-ev3dev allows uploading code to EV3 (and much more).thonny-black-format adds a command for formatting current file with Black.Thonny has simple infrastructure for extensions. Older releases and prereleases can be found at Plug-ins
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Latest stable releases are linked in the download box at the top of this page.
We are also grateful for the help of several contributors from the open-source community around the world. Since September 2018 development of Thonny is partially supported by Cybernetica AS.ĭevelopment of several features in Thonny 3.0 and 3.3 was proposed and supported by Raspberry Pi Foundation. Select Tools → Manage packages for even easier installation of 3rd party packages.įrom 2014 to 2018 the main development of Thonny took place in Institute of Computer Science of University of Tartu, Estonia. PATH and conflicts with other Python interpreters are taken care of by Thonny. Select Tools → Open system shell to install extra packages or learn handling Python on command line. Students can explore APIs with the help of code completion. Value) but you can switch to more realistic model (name → address/id → value). Variables are initially presented according to simplified model (name → Local variables are visually distinguished from globals. Highlighting variable occurrences reminds you that the same name doesn't always mean the same variable and helps spotting typos. Thonny's editor makes these easy to spot. Unclosed quotes and parentheses are the most common beginners' syntax errors. Good understanding of how function calls work is especially important for understanding recursion. Stepping into a function call opens a new window with separate local variables table and code You can think of this light-blue box as a piece of paper where Python replaces subexpressions with their values, piece-by-piece.įaithful representation of function calls. If you use small steps, then you can even see how Python evaluates your expressions. Steps follow program structure, not just code lines. Press F6 for a big step and F7 for a small step. Just press Ctrl+F5 instead of F5 and you can run your programs step-by-step, no breakpoints needed. Once you're done with hello-worlds, select View → Variables and see how your programs and shell commands affect Python variables. (You can also use a separate Python installation, if necessary.) The initial user interface is stripped of all features that may distract beginners. Thonny comes with Python 3.7 built in, so just one simple installer is needed and you're ready to learn programming.
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