Using Pyodide
Pyodide is the created by compiling the default Python interpreter to webassembly - a technology that is supported by the browsers.
Many (but not all) of the 3rd party Python packages are supported.
You can play around with Python on your browser without having to install it here: https://pyodide.org/en/stable/console.html (it may take a short time to download)
More about Pyodide: https://pyodide.org/en/stable/