installation still does work

[Uwe Brauer]

Hi

I followed the instructions in 
https://medium.com/@moreless/install-python-3-6-on-ubuntu-16-04-28791d5c2167
and in fact installed python 3.8

I cannot de install python 3.5 because a huge amount of package depend
on python 3.5

However when I follow the instruction 

hg clone https://kallithea-scm.org/repos/kallithea -u stable
cd kallithea
python3 -m venv ../kallithea-venv
. ../kallithea-venv/bin/activate
pip install --upgrade pip setuptools
pip install --upgrade -e .
python3 setup.py compile_catalog   # for translation of the UI


,----
| 
| https://kallithea.readthedocs.io/en/stable/installation.htmlpip install --upgrade -e .
| Obtaining file:///home/oub/src/kallithea
|     ERROR: Command errored out with exit status 1:
|      command: /home/oub/src/kallithea-venv/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/home/oub/src/kallithea/setup.py'"'"'; __file__='"'"'/home/oub/src/kallithea/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-h0npqkk4
|          cwd: /home/oub/src/kallithea/
|     Complete output (5 lines):
|     Traceback (most recent call last):
|       File "<string>", line 1, in <module>
|       File "/home/oub/src/kallithea/setup.py", line 13, in <module>
|         raise Exception('Kallithea requires Python 3.6 or later')
|     Exception: Kallithea requires Python 3.6 or later
|     ----------------------------------------
| ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
`----

Well python3 was symbolically still linked to python3.5 

So I changed that set the link from python 3.8 to python 3

Did not work, 




/usr/bin/python3.8 -m pip install --upgrade pip setuptools

But then 

No module named pip

I tried 

python3.8 -m pip install --user pipenv

/usr/bin/python3.8: No module named pip


Most likely I need some python module, but which and how can I obtain
it.

Sorry for these elementary questions

Uwe