ModuleNotFoundError: No module named ''

Dear all,
To use lascar module, in my jupyter notebook, I typed

git clone
cd lascar
  Then I found that the execution of the following line
python3 develop

would take too much time; thus I type this line in my command line terminal.
Then I restart the kernel; I execute the following lines in jupyter notebook,

from lascar import *
from import sbox, inv_sbox

I got an error message as:
ModuleNotFoundError: No module named ‘’


If you remove the from import sbox, inv_sbox line, does the command succeed?


Hello, I’m facing a similar issue in lab 1_1B (SCA201).
When I run these commands:

Thank you,

I couldn’t attach the error picture on other post , here it is:

Hey Nafisa,
The way I fixed this problem is as follows:
1. Go to the folder WPy64-3740, click WinPython Command Prompt.
2. Follow the steps, first type

1 pip3 install lascar

Once the installation completes, type

2 cd lascar
3 python develop

Now, reset the jupyter kernel. Hope this would help you.