- Introducing Step Debugging for Python
- online compiler and debugger for c/c++
- Running Turbo C Project
- Save Project
- Extra Compiler Flags
- Are you sure you want to delete file ` `?
- New File
- Rename File
- Share Link
- Lost connection to server
- Debug session stopped
- Debug mode for python program is not yet supported.
- Login to your account
- Login with
- Run Console session stopped
- Add School/University/Institute
- Keyboard Shortcuts
- online compiler and debugger for c/c++
- Running Turbo C Project
- Save Project
- Extra Compiler Flags
- Are you sure you want to delete file ` `?
- New File
- Rename File
- Share Link
- Lost connection to server
- Debug session stopped
- Debug mode for python program is not yet supported.
- Login to your account
- Login with
- Run Console session stopped
- Add School/University/Institute
- Keyboard Shortcuts
- Visualize Your Python Code, Debugging for beginners .
- Debug and Visualize Your Python Code with PythonTutor.com
- Understanding Program Execution
- Debugging Made Easier
- Visualizing Data Structures
- Sharing and Collaborating
- Conclusion
Introducing Step Debugging for Python
At Repl.it, our goal is to make programming more accessible, and as part of this we aim to provide the full power of popular programming environments with no setup time. And I don’t think it’s an understatement to say that debugging is the majority of what we, as programmers, do.
That’s why today we’re making it possible to step-debug through your Python 3 code right from the browser. We’ve built a new debug pane that makes it easy step in, out, over, and resume your code. All the common operations a typical debugger would do.
- write your code
- click the «debug» button on the top right corner of the editor
- a debug pane will pop-up underneath the console
- this allows you step through your code
Note that this is still in Beta and we have a lot we want to improve on it. The obvious thing that we’ll be adding shortly is support for breakpoints. But that’s not all, we want this to be on parity with the best debuggers in industry:
- Add breakpoint support.
- Add a scope pane to see what variables are in scope and what are their values.
- Evaluate expressions in context.
- Add watch expressions.
Give it a spin on this recursive factorial program.
Let us know if you hit any bugs or if you have any feature requests. Happy debugging!
Thanks to Thomas Ballinger for his help in designing and implementing the remote Python debugger service.
online compiler and debugger for c/c++
New Version of OnlineGDB is available. Please save your data and refresh page to update.
Running Turbo C Project
Save Project
Extra Compiler Flags
Are you sure you want to delete file ` `?
New File
Rename File
Share Link
Lost connection to server
Oops! Connection to server is lost. Please refresh the page to reconnect.
Debug session stopped
Debug session is being stopped due to inactivity.
Debug mode for python program is not yet supported.
Login to your account
Login with
Run Console session stopped
Run Console is being stopped due to inactivity.
Add School/University/Institute
Keyboard Shortcuts
IDE Shortcuts: New file : Ctrl-M Run Code : F9 Debug Code : F8 Save Project : Ctrl-S Beautify Code : Ctrl-B Settings Menu : Ctrl-Shift-S Info : Ctrl-I Editor Shortcuts: showSettingsMenu : Ctrl-, goToNextError : Alt-E goToPreviousError : Alt-Shift-E selectall : Ctrl-A gotoline : Ctrl-L fold : Alt-L|Ctrl-F1 unfold : Alt-Shift-L|Ctrl-Shift-F1 toggleFoldWidget : F2 toggleParentFoldWidget : Alt-F2 foldOther : Alt-0 unfoldall : Alt-Shift-0 findnext : Ctrl-K findprevious : Ctrl-Shift-K selectOrFindNext : Alt-K selectOrFindPrevious : Alt-Shift-K find : Ctrl-F overwrite : Insert selecttostart : Ctrl-Shift-Home gotostart : Ctrl-Home selectup : Shift-Up golineup : Up selecttoend : Ctrl-Shift-End gotoend : Ctrl-End selectdown : Shift-Down golinedown : Down selectwordleft : Ctrl-Shift-Left gotowordleft : Ctrl-Left selecttolinestart : Alt-Shift-Left gotolinestart : Alt-Left|Home selectleft : Shift-Left gotoleft : Left selectwordright : Ctrl-Shift-Right gotowordright : Ctrl-Right selecttolineend : Alt-Shift-Right gotolineend : Alt-Right|End selectright : Shift-Right gotoright : Right selectpagedown : Shift-Pagedown gotopagedown : Pagedown selectpageup : Shift-Pageup gotopageup : Pageup scrollup : Ctrl-Up scrolldown : Ctrl-Down selectlinestart : Shift-Home selectlineend : Shift-End togglerecording : Ctrl-Alt-E replaymacro : Ctrl-Shift-E jumptomatching : Ctrl-P selecttomatching : Ctrl-Shift-P expandToMatching : Ctrl-Shift-M removeline : Ctrl-D duplicateSelection : Ctrl-Shift-D sortlines : Ctrl-Alt-S togglecomment : Ctrl-/ toggleBlockComment : Ctrl-Shift-/ modifyNumberUp : Ctrl-Shift-Up modifyNumberDown : Ctrl-Shift-Down replace : Ctrl-H undo : Ctrl-Z redo : Ctrl-Shift-Z|Ctrl-Y copylinesup : Alt-Shift-Up movelinesup : Alt-Up copylinesdown : Alt-Shift-Down movelinesdown : Alt-Down del : Delete backspace : Shift-Backspace|Backspace cut_or_delete : Shift-Delete removetolinestart : Alt-Backspace removetolineend : Alt-Delete removewordleft : Ctrl-Backspace removewordright : Ctrl-Delete outdent : Shift-Tab indent : Tab blockoutdent : Ctrl-[ blockindent : Ctrl-] transposeletters : Ctrl-T touppercase : Ctrl-U tolowercase : Ctrl-Shift-U expandtoline : Ctrl-Shift-L addCursorAbove : Ctrl-Alt-Up addCursorBelow : Ctrl-Alt-Down addCursorAboveSkipCurrent : Ctrl-Alt-Shift-Up addCursorBelowSkipCurrent : Ctrl-Alt-Shift-Down selectMoreBefore : Ctrl-Alt-Left selectMoreAfter : Ctrl-Alt-Right selectNextBefore : Ctrl-Alt-Shift-Left selectNextAfter : Ctrl-Alt-Shift-Right splitIntoLines : Ctrl-Alt-L alignCursors : Ctrl-Alt-A findAll : Ctrl-Alt-K showKeyboardShortcuts : Ctrl-Alt-H
online compiler and debugger for c/c++
New Version of OnlineGDB is available. Please save your data and refresh page to update.
Running Turbo C Project
Save Project
Extra Compiler Flags
Are you sure you want to delete file ` `?
New File
Rename File
Share Link
Lost connection to server
Oops! Connection to server is lost. Please refresh the page to reconnect.
Debug session stopped
Debug session is being stopped due to inactivity.
Debug mode for python program is not yet supported.
Login to your account
Login with
Run Console session stopped
Run Console is being stopped due to inactivity.
Add School/University/Institute
Keyboard Shortcuts
IDE Shortcuts: New file : Ctrl-M Run Code : F9 Debug Code : F8 Save Project : Ctrl-S Beautify Code : Ctrl-B Settings Menu : Ctrl-Shift-S Info : Ctrl-I Editor Shortcuts: showSettingsMenu : Ctrl-, goToNextError : Alt-E goToPreviousError : Alt-Shift-E selectall : Ctrl-A gotoline : Ctrl-L fold : Alt-L|Ctrl-F1 unfold : Alt-Shift-L|Ctrl-Shift-F1 toggleFoldWidget : F2 toggleParentFoldWidget : Alt-F2 foldOther : Alt-0 unfoldall : Alt-Shift-0 findnext : Ctrl-K findprevious : Ctrl-Shift-K selectOrFindNext : Alt-K selectOrFindPrevious : Alt-Shift-K find : Ctrl-F overwrite : Insert selecttostart : Ctrl-Shift-Home gotostart : Ctrl-Home selectup : Shift-Up golineup : Up selecttoend : Ctrl-Shift-End gotoend : Ctrl-End selectdown : Shift-Down golinedown : Down selectwordleft : Ctrl-Shift-Left gotowordleft : Ctrl-Left selecttolinestart : Alt-Shift-Left gotolinestart : Alt-Left|Home selectleft : Shift-Left gotoleft : Left selectwordright : Ctrl-Shift-Right gotowordright : Ctrl-Right selecttolineend : Alt-Shift-Right gotolineend : Alt-Right|End selectright : Shift-Right gotoright : Right selectpagedown : Shift-Pagedown gotopagedown : Pagedown selectpageup : Shift-Pageup gotopageup : Pageup scrollup : Ctrl-Up scrolldown : Ctrl-Down selectlinestart : Shift-Home selectlineend : Shift-End togglerecording : Ctrl-Alt-E replaymacro : Ctrl-Shift-E jumptomatching : Ctrl-P selecttomatching : Ctrl-Shift-P expandToMatching : Ctrl-Shift-M removeline : Ctrl-D duplicateSelection : Ctrl-Shift-D sortlines : Ctrl-Alt-S togglecomment : Ctrl-/ toggleBlockComment : Ctrl-Shift-/ modifyNumberUp : Ctrl-Shift-Up modifyNumberDown : Ctrl-Shift-Down replace : Ctrl-H undo : Ctrl-Z redo : Ctrl-Shift-Z|Ctrl-Y copylinesup : Alt-Shift-Up movelinesup : Alt-Up copylinesdown : Alt-Shift-Down movelinesdown : Alt-Down del : Delete backspace : Shift-Backspace|Backspace cut_or_delete : Shift-Delete removetolinestart : Alt-Backspace removetolineend : Alt-Delete removewordleft : Ctrl-Backspace removewordright : Ctrl-Delete outdent : Shift-Tab indent : Tab blockoutdent : Ctrl-[ blockindent : Ctrl-] transposeletters : Ctrl-T touppercase : Ctrl-U tolowercase : Ctrl-Shift-U expandtoline : Ctrl-Shift-L addCursorAbove : Ctrl-Alt-Up addCursorBelow : Ctrl-Alt-Down addCursorAboveSkipCurrent : Ctrl-Alt-Shift-Up addCursorBelowSkipCurrent : Ctrl-Alt-Shift-Down selectMoreBefore : Ctrl-Alt-Left selectMoreAfter : Ctrl-Alt-Right selectNextBefore : Ctrl-Alt-Shift-Left selectNextAfter : Ctrl-Alt-Shift-Right splitIntoLines : Ctrl-Alt-L alignCursors : Ctrl-Alt-A findAll : Ctrl-Alt-K showKeyboardShortcuts : Ctrl-Alt-H
Visualize Your Python Code, Debugging for beginners .
Debug and Visualize Your Python Code with PythonTutor.com
As a beginner Python developer, understanding how your code executes and identifying bugs can be challenging. This is where PythonTutor.com comes to the rescue. PythonTutor.com is a free online tool that offers an interactive environment to debug and visualize Python code, providing a valuable learning resource for newcomers to the language.
Understanding Program Execution
One of the primary advantages of PythonTutor.com is its ability to visually demonstrate the step-by-step execution of Python programs. By entering your code into the platform, you can watch as it is executed line by line, seeing how variables change their values and how control flows through the program. This visual representation helps beginners grasp the flow of execution and understand the behavior of their code.
Debugging Made Easier
PythonTutor.com simplifies the process of debugging by allowing you to step through your code and observe its state at each step. You can set breakpoints and view the values of variables and expressions at any point during the execution. This feature is especially useful for identifying logical errors or unexpected behaviors in your code. By visually inspecting the program’s state, you gain insights into why certain bugs occur, facilitating the debugging process.
Visualizing Data Structures
Understanding data structures is crucial for writing efficient and bug-free code. PythonTutor.com enables you to visualize various data structures, including lists, dictionaries, and stacks, in real-time. By seeing how these structures evolve as the program executes, you can better comprehend their behavior and make informed decisions about their usage. This visual representation enhances your understanding of data manipulation and enables you to write more robust code.
Sharing and Collaborating
PythonTutor.com provides an option to share your code and its visual representation with others. This feature is beneficial when seeking help from peers or mentors. By sharing a link to your code, you can effectively communicate your issue or question, and others can view your code execution and provide assistance. This collaborative aspect fosters a supportive learning community and accelerates your growth as a Python developer.
Conclusion
PythonTutor.com is an invaluable tool for beginner Python developers, offering a range of features that simplify the process of debugging and visualizing code. Through its step-by-step execution visualization, debugging capabilities, data structure visualization, and collaborative sharing, PythonTutor.com empowers beginners to better understand their code and accelerate their learning journey. Next time you find yourself stuck while debugging or want a deeper understanding of your Python code, give PythonTutor.com a try. It will undoubtedly become an essential part of your learning toolkit. Happy coding and debugging!