Making a kind of a browser based Python IDLE that also allows the user of files

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The title more or less tells it all. Ideally, I would like the html as self-sufficient as possible and definitely run the code in the browser. In addition, I would like be able to:

  • use files, including uploading files and viewing text files, in addition of course to being able to run files.
  • writing at least short text files.
  • type and run code directly in the interpreter/terminal.
  • use most modules in the Python standard library, but especially random, os, datetime, time and pickle.

I was experimenting with brython-runner obviously based on Brython. However, I would be perfectly happy using some other tool, e.g. PyScript or combination of them.

What I succeeded was in making a basic interpreter that runs the code from the "editor" pane in another pane, but this involved practically just copying the code from brython-runner or more precisely index.html from there and running a locally a handler from https://github.com/pythonpad/brython-runner-stdin-hanger for input to work (pythonpad handler does not work at the time of writing).

What I would like is at least to also use files (see above), if tying in the "interpreter" would be allowed, this would be even better. I noticed that brython-runner also mentions runCodeWithFiles, but I was not able to get this to work. Bellow is my miserable attempt.

Any help would be greatly appreciated.

<!doctype html>
<html>
<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.2/codemirror.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.2/codemirror.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.2/theme/ayu-mirage.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.2/mode/python/python.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.2/addon/comment/comment.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.2/keymap/sublime.js"></script>
    <link rel="stylesheet" type="text/css" href="index.css">
    <script src="./brython-runner.bundle.js"></script>
</head>
<body>
    <div class="dev-box">
        <div class="toolbar-row">
            <button class="toolbar-button" onclick="run()">
                Run
            </button>
        </div>
        <div class="workspace-row">
            <div class="editor-column">
                <div class="editor" id="editor"></div>
            </div>
            <div class="run-column">
                <div class="output-box" id="output">

                </div>
            </div>
        </div>
    </div>
    <script>
        // Initialize the code editor.
        const CODEMIRROR_OPTIONS = {
            lineNumbers: true,
            lineSeparator: '\n',
            mode: undefined,
            theme: 'ayu-mirage',
            fontSize: 14,
            indentUnit: 4,
            tabSize: 4,
            indentWithTabs: false,
            lineWrapping: true,
            readOnly: false,
            smartIndent: true,
            matchBrackets: true,
            autoCloseBrackets: true,
            showTrailingSpace: true,
            keyMap: 'sublime',
            extraKeys: null,
            showInvisibles: true,
            viewportMargin: Infinity,
        }
        const codeStoreKey = 'brython-runner-dev-code'
        const loadedCode = localStorage.getItem(codeStoreKey)
        const code = loadedCode || 'print("hello world")'
        const editor = CodeMirror(document.getElementById('editor'), {
            ...CODEMIRROR_OPTIONS,
            mode: 'python',
            value: code,
        })
        editor.on('change', (editor, change) => {
            localStorage.setItem(codeStoreKey, editor.getDoc().getValue())
        })
        const files = {
            'data/': {
                'type': 'dir',
                'body': '',
            },
            'data/rac.txt': {
                'type': 'text',
                'body': '''izdelek  cena    kolicina
Jajca   0.20    6
Kruh    1.80    1
Salama  5.75    0.40
''',            
            },
            'main.py': {
                'type': 'text',
                'body': '',
            }
        };
        const runner = new BrythonRunner({
            onFileUpdate(filename, data) {
                files[filename].type = data.type;
                files[filename].body = data.body;
            },
            hangerUrl: 'http://localhost:9095/hanger',
            stdout: {
                write(content) {
                    var el = document.createElement('code')
                    var text = document.createTextNode(content)
                    el.appendChild(text)
                    document.getElementById('output').appendChild(el)  
                },
                flush() { }
            },
            stderr: {
                write(content) {
                    var el = document.createElement('code')
                    var text = document.createTextNode(content)
                    el.appendChild(text)
                    el.setAttribute('class', 'error')
                    document.getElementById('output').appendChild(el)
                },
                flush() { }
            },
            stdin: {
                async readline() {
                    var data = prompt()
                    
                    var el = document.createElement('code')
                    var text = document.createTextNode(data + '\n')
                    el.appendChild(text)
                    document.getElementById('output').appendChild(el)  

                    return data
                },
            }
        })
        function clearOutput() {
            document.getElementById('output').innerHTML = ''
        }
        function getCode() {
            return editor.getDoc().getValue()
        }
        function run() {
            clearOutput()
            runner.runCodeWithFiles(files['main.py'].body, files);
        }
    </script>
    </body>
</html>
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