Flair is not running after upgrading on Ubuntu (wsl)

Flair
1

Versions

Please provide the used software versions.

FLUKA: 4-4.1
Flair: 3.4-5.2
Operating system: ubuntu 20.04.6

Description

Dear All,

After upgrading to 3.4-5.2 I get the error:

“File “/usr/local/flair/flair.py”, line 88, in
import inputs
File “/usr/local/flair/inputs.py”, line 18, in
import fluka
File “/usr/local/flair/fluka/init.py”, line 31, in
from .input import Fluka, LowNeutMaterial
File “/usr/local/flair/fluka/input.py”, line 245, in
class Fluka(Input):
File “/usr/local/flair/fluka/input.py”, line 260, in Fluka
abundances : dict[int,list[tuple[int,float]]] = {}
TypeError: ‘type’ object is not subscriptable”.

I tried the trick with flair.ini but it is not working reading Vassilis past solutions. (Do I have to upgrade FLuka?)

Thank you in advance,

Best wishes,

Nikos

Input files

Please upload all relevant files. (FLUKA input file, Flair project file, user routines, and data files)

2

Dear Nikolaos,

it seems the recently added code requires python 3.9 to work correctly.

I see two solutions:

  1. You may want to change the WSL distribution for a more recent version of Ubuntu.

  2. You can install the python3.9 package on Ubuntu 20.04 and add the following line to your .bashrc file:

    export PYTHON=python3.9

Cheers,
David

3

Dear David,

Thank you for your prompt reply yesterday morning,

Best,

Nikos