pyodide_runPythonAsync.md

(js_api_pyodide_runPythonAsync)=

pyodide.runPythonAsync(code, messageCallback, errorCallback)

Runs Python code, possibly asynchronously loading any known packages that the code chunk imports.

For example, given the following code chunk

import numpy as np
x = np.array([1, 2, 3])

pyodide will first call pyodide.loadPackage(['numpy']), and then run the code chunk, returning the result. Since package fetching must happen asynchronously, this function returns a Promise which resolves to the output. For example, to use:

pyodide.runPythonAsync(code, messageCallback)
  .then((output) => handleOutput(output))

Parameters

name	type	description
code	String	Python code to evaluate
messageCallback	function	A callback, called with progress messages. (optional)
errorCallback	function	A callback, called with error/warning messages. (optional)

Returns

name	type	description
result	Promise	Resolves to the result of the code chunk