Method of Manufactured Solutions (MMS): running example results in error

[klean700c]

Dear MOOSE community,

I tried to run the documented example from https://mooseframework.inl.gov/python/mms.html .

#!/usr/bin/env python3

import mms
fs,ss = mms.evaluate('-div(grad(u))', 'sin(2*pi*x)*sin(2*pi*y)')
mms.print_fparser(fs)

mms.print_hit(fs, 'force')
mms.print_hit(ss, 'exact')

I ran the program by

(base) jan@Jan-ThinkPad:~$ mamba activate moose
(moose) jan@Jan-ThinkPad:~/projects$ python3 mms_exact.py

Unfortunatelly, it returns the following error message

Traceback (most recent call last):
  File "/home/jan/projects/mms_exact.py", line 11, in <module>
    import mms
ModuleNotFoundError: No module named 'mms'

I installed sympy before I ran the code.
Can you explain me how to implement the mms module?
I´m a new user to MOOSE and Ubuntu 18.04.5. Perhaps I did some obvious error, that was not that obvious to me. Although, compiling and testing MOOSE went successful.

Thanks!

[GiudGiud]

Hello

mms is one of our packages.
You just need to tell Python where to look for that module. We by default dont modify your PYTHONPATH

so
export PYTHONPATH=$PYTHONPATH:/home/jan/projects/moose/python

Guillaume

[hugary1995]

Is it possible to let the conda environment modify PYTHONPATH for us? I've run into this issue several times already.

[GiudGiud]

it's certainly possible if we know where people installed moose.
@milljm what do you think?