What is it all about?
Thonny comes with Python 3.5 built in so that you need to run only single simple installer and you're ready to learn programming. (You can also use separate Python installation, if necessary.) Initial user interface is stripped from all features that may distract beginners
*No-hassle variables. Once you're done with hello-worlds, select View → Variables and you see how your programs and shell commands affect Python variables. *Simple debugger. Just press Ctrl+F5 instead of F5 and you can run your programs step-by-step, no breakpoints needed. Press F6 for a big step and F7 for a small step. Steps follow program structure, not just code lines. *Step through expression evaluation. If you use small steps, then you can even see how Python evaluates your expressions. You can think of this light-blue box as a piece of paper where Python replaces subexpressions with their values, piece-by-piece. *Faithful representation of function calls. Stepping into a function call opens a new window with separate local variables table and code pointer. Good understanding of how function calls work is especially important for understanding recursion. *Mode for explaining references. Variables are initially presented according to simplified model (name → value) but you can switch to more realistic model (name → address/id → value).