Debugging

PDB

You can use the python debugger to debug your Solara app.

Simply add breakpoint() to your code, and trigger the code, and you will enter the debugger.

import solara

clicks = solara.reactive(0)


@solara.component
def Page():
    color = "green"
    if clicks.value >= 5:
        color = "red"

    def increment():
        clicks.value += 1
        # this will trigger the debugger
        breakpoint()
        print("clicks", clicks)  # noqa

    solara.Button(label=f"Clicked: {clicks}", on_click=increment, color=color)

PyCharm or IntelliJ

You can also use the debugger of PyCharm or IntelliJ to debug your Solara app. The following settings works for PyCharm or IntelliJ:

VSCode

In VSCode, you can use the following launch.json to debug your Solara app:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Solara: Launch",
            "type": "python",
            "request": "launch",
            "program": "/Users/maartenbreddels/miniconda3/envs/dev/bin/solara",
            "args": [
                "run",
                "${file}"
            ],
            "console": "integratedTerminal",
            "justMyCode": true,
        }
    ]
}

Now keep your script tab open, and press F5 to start debugging (or click the play icon in the UI).