Couldn't install a go-game called dlgo

[Nomamesse]

Do you mean : "Delete your (test_env) and make a new environment" ?
If the answer is yes, can you tell me how to ?

Yes just delete folder test_env and make new one,with same name or new name.
Then when new enviroment is activate do pip --no-cache-dir install dlgo

'm sorry but I don't understand the rest of your post, would you mind rephrasing it ? I can speak french or spanish if you're more comfortable with them.
Thanks by advance for your answer.

I was talking about Anaconda/Miniconda look at this post or post.

Ok I did as you said : erased test_venv, reinstalled, activated and then copied pasted the command you gave me but the same error message still appears:

C:\Users\Nomamesse\test_env\Scripts>activate

(test_env) C:\Users\Nomamesse\test_env\Scripts>pip --no-cache-dir install dlgo
Collecting dlgo
  Downloading dlgo-0.2-py3-none-any.whl (121 kB)
     ---------------------------------------- 121.5/121.5 kB 1.8 MB/s eta 0:00:00
Collecting Flask>=0.10.1
  Downloading Flask-2.2.2-py3-none-any.whl (101 kB)
     ---------------------------------------- 101.5/101.5 kB ? eta 0:00:00
Collecting Flask-Cors
  Downloading Flask_Cors-3.0.10-py2.py3-none-any.whl (14 kB)
Collecting future
  Downloading future-0.18.2.tar.gz (829 kB)
     ---------------------------------------- 829.2/829.2 kB 6.6 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting gomill
  Downloading gomill-0.8.3.tar.gz (241 kB)
     ---------------------------------------- 241.5/241.5 kB 7.2 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting h5py
  Downloading h5py-3.7.0.tar.gz (392 kB)
     ---------------------------------------- 392.4/392.4 kB 8.1 MB/s eta 0:00:00
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Collecting keras==2.2.2
  Downloading Keras-2.2.2-py2.py3-none-any.whl (299 kB)
     ---------------------------------------- 299.3/299.3 kB 9.3 MB/s eta 0:00:00
Collecting numpy<=1.14.5
  Downloading numpy-1.14.5.zip (4.9 MB)
     ---------------------------------------- 4.9/4.9 MB 9.2 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting six
  Downloading six-1.16.0-py2.py3-none-any.whl (11 kB)
Collecting dlgo
  Downloading dlgo-0.1-py3-none-any.whl (121 kB)
     ---------------------------------------- 121.4/121.4 kB 6.9 MB/s eta 0:00:00
Collecting keras
  Downloading keras-2.11.0-py2.py3-none-any.whl (1.7 MB)
     ---------------------------------------- 1.7/1.7 MB 8.9 MB/s eta 0:00:00
ERROR: Cannot install dlgo==0.1 and dlgo==0.2 because these package versions have conflicting dependencies.

The conflict is caused by:
    dlgo 0.2 depends on tensorflow==1.10.1
    dlgo 0.1 depends on tensorflow

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

[notice] A new release of pip available: 22.3 -> 22.3.1
[notice] To update, run: python.exe -m pip install --upgrade pip