Import a JavaScript file in Python and run several functions

Question

I have been trying to use earthengine-api (Google Earth Engine) in Python (specifically in Jupyter Notebook). When I import a JavaScript file using js2py library, like below:

import js2py
functions_js = js2py.run_file('several_functions.js')

I get the following output:

print(functions_js):

({'Year': 'function (x, n) { [python code] }', 
'addData': 'function addData(img, pheno) { [python code] }',
... , 

'aggregate': 'function (image, prop, reducerList, bandsList, delta) { [python code] }'
...

<js2py.evaljs.EvalJs object at 0x000001C7680AB3D0>)

I have tried to use those functions, like below:

functions_js.aggregate(image, "date_daily", 'sum')

However, it is not working.

JsException: ReferenceError: ee is not defined

How can I do this correctly?