using jupyter in docker but not running in docker environment

[xuzhawei]

I open a demo.ipynb file in docker following the guild but it seems that it still run in local environment.

the code is :

import os
import sys
import random
import math
import numpy as np
import skimage.io
import matplotlib

and I get the error :no module named skimage.io

but I run python3 in docker and import skimage.io, it works

then I install scik-image in my computer's local environment, then run the code again, it works!

How can I make the code in jupyter run in docker ?