roundtrip

roundtrip.py

import bokeh.models as bm
from bokeh.layouts import row
from bokeh.plotting import show

data = bm.TextInput(width=100)
go = bm.Button(label='Go', width=50)
result = bm.TextInput(width=100)
callback = bm.CustomJS(args={'data': data, 'result': result}, code="""
    var g = window.pyodide.globals;
    g.set('data', data.value);
    window.pyodide.runPython(`
        squared = str(int(data)**2);
    `);
    
    result.value = g.get('squared');
    result.change.emit();
""")
go.js_on_click(callback)
show(row(data, go, result))