I am installing on a clean (just installed) Ubuntu 18.04(.3), and following the instructions for installation for development on the indico site.
All goes exactly as expected up to the step:
“pip install -e .”
at which point I get an ERROR:
ERROR: Package ‘indico’ requires a different Python: 2.7.17 not in ‘~=3.9’
The default Python is indeed 2.7.17, and I am stumped.
Any helpful ideas?
Thanks,
Use the 2.3-maintenance branch if you want to develop on the stable version. master is for Indico 3 which requires Python 3.9.
Thanks for that helpful hint.
This opens up a lot of questions, however, about the feasibility of developing
agains the stable (2.3) version:
-is version 3 coming soon (ie. within the next 6 months)?
-are there structural differences between versions 2.3 and 3 that would render
any halfway (or even fully) developed 2.3-plugins useless?
Nobody wants to waste time developing for /dev/null.
regards
is version 3 coming soon (ie. within the next 6 months)?
Certainly. More like within the next 2 months I hope.
are there structural differences between versions 2.3 and 3 that would render any halfway (or even fully) developed 2.3-plugins useless?
No. In fact, when porting the Zoom plugin this is all that needed to be changed. And the majority was fully automated by using modernize --no-diffs -n -w -x import vc_zoom/, then pyupgrade --py38-plus vc_zoom/**/*.py and some cleanups (removing unused six imports, isort, flake8) plus minor bugfixes (for some reason a case of viewitems() didn’t get automatically replaced with items()).
I am trying to install the Development version of Indico by following the instructions provided on this page.
I got two errors. The first one was with venv being not compatible. I ran sudo apt-get install python3-venv and it got fixed.
Now I have python3.8-venv.
When I run pip install -e '.[dev]', I get ERROR: Package 'indico' requires a different Python: 3.8.10 not in '~=3.9.0'.
I have tried different ways to fix this but none works.
You need Python 3.9 - that’s why the setup guide uses pyenv.
I am really sorry to do this. I am having problem just setting up the pyenv, giving me the above error. What am I doing wrong.
# Install Dependencies
sudo apt-get install -y make build-essential libssl-dev zlib1g-dev \
libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev \
libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python-openssl
# Intall Pyenv
curl https://pyenv.run | bash
export PATH="$HOME/.pyenv/bin:$PATH"
export PATH="$PYENV_ROOT/bin:$PATH"
if command -v pyenv 1>/dev/null 2>&1; then
eval "$(pyenv init -)"
fi
exec "$SHELL" # Or just restart your terminal
pyenv install --list | grep " 3\.[678]"
mkdir -p ~/dev/indico/data
cd ~/dev/indico
pyenv install 3.9.10
pyenv local 3.9.10
apt install python3.9-venv
python -m venv env
after adding the repo and plug ins dir
source ./env/bin/activate
pip install -U pip setuptools wheel
cd src
pip install -e '.[dev]'
I get
ERROR: Package 'indico' requires a different Python: 3.8.10 not in '~=3.9.0'.
I tried several solutions including:
Delete system Python installations
set Pyenv global as well as local to 3.9.10
No success.
Sounds like your pyenv isn’t active… how does your $PATH look like? And without the venv etc, what does python -V tell you? It should be Python 3.9.*
apt install python3.9-venv is not needed btw.
I did
alias python=/home/vagrant/.pyenv/versions/3.9.10/bin/python
Now python -V gives me 3.9.10
If I do not install venv separately, I get
Error: [Errno 71] Protocol error: 'lib' -> '/home/vagrant/dev/env/lib64'
$PATH outputs this
bash: /home/vagrant/.pyenv/plugins/pyenv-virtualenv/shims:/home/vagrant/.pyenv/bin:/home/vagrant/.pyenv/plugins/pyenv-virtualenv/shims:/home/vagrant/.pyenv/bin:/home/vagrant/.pyenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin: No such file or directory
I think there must be something wrong with your environment. Unfortunately it’s hard to debug such things without having a shell in that environment, but I’d have a look at the docs on https://github.com/pyenv/pyenv/ whether you can find anything useful. In any case I recommend making sure hat pyenv is working correctly before doing any steps regarding Indico.
PS: If your distribution has Python 3.9, you could even skip pyenv altogether - in that case using python3.9 -m venv ... should create a virtual environment using Python 3.9.
Cool. I’ll try that. I’ll try different servers too. The problem might even be with Vagrant. Thank you for your valuable support. 