cannot import name 'Project'

[bugwz]

When i run pecan populate config/dev.py, i met the error:

(virtualenv) [shaman@142ba6b2f6af shaman]$ pecan populate config/dev.py
/home/shaman/virtualenv/lib/python3.6/site-packages/pecan/commands/base.py:51: RuntimeWarning: Unable to load plugin populate = shaman.commands.populate:PopulateCommand: cannot import name 'Project'
  warn("Unable to load plugin %s: %s" % (ep, e), RuntimeWarning)
usage: pecan [-h] [--version] command ...

positional arguments:
  command
    serve     Serves a Pecan web application
    shell     Open an interactive shell with the Pecan app loaded
    create    Creates the file layout for a new Pecan scaffolded project

optional arguments:
  -h, --help  show this help message and exit
  --version   show program's version number and exit

pecan: argument command: invalid choice: 'populate' (choose from 'serve', 'shell', 'create')
(virtualenv) [shaman@142ba6b2f6af shaman]$

My env is:

(virtualenv) [shaman@142ba6b2f6af shaman]$ pip --version
pip 21.3.1 from /home/shaman/virtualenv/lib/python3.6/site-packages/pip (python 3.6)
(virtualenv) [shaman@142ba6b2f6af shaman]$ python --version
Python 3.6.8
(virtualenv) [shaman@142ba6b2f6af shaman]$ pip list
Package            Version     Editable project location
------------------ ----------- -------------------------
alembic            0.8.6
beautifulsoup4     4.11.2
certifi            2022.12.7
chardet            4.0.0
CherryPy           8.9.1
decorator          5.1.1
enum34             1.1.10
greenlet           2.0.2
gunicorn           19.6.0
idna               2.10
importlib-metadata 4.8.3
ipython            5.0.0
ipython-genutils   0.2.0
Jinja2             2.11.3
logutils           0.3.5
Mako               1.1.6
MarkupSafe         2.0.1
mock               5.0.1
notario            0.0.16
pecan              1.4.0
pecan-notario      0.0.3
pexpect            4.8.0
pickleshare        0.7.5
pika               1.2.0
pip                21.3.1
projects           1.0.9
prompt-toolkit     1.0.18
psycopg2           2.8.6
ptyprocess         0.7.0
Pygments           2.14.0
python-editor      1.0.4
PyYAML             6.0
requests           2.25.1
setuptools         59.6.0
shaman             0.1         /home/shaman/shaman
simplegeneric      0.8.1
six                1.16.0
soupsieve          2.3.2.post1
SQLAlchemy         1.4.0
termcolor          1.1.0
traitlets          4.3.3
typing_extensions  4.1.1
urllib3            1.26.15
urwid              2.1.2
waitress           2.0.0
wcwidth            0.2.6
WebOb              1.8.7
WebTest            3.0.0
wheel              0.37.1
WSGIserver         1.3
zipp               3.6.0

I found the Project is shaman's local class, i don't know how to fix it. Please~

[bugwz]

Add some python's sys path info:

(virtualenv) [shaman@142ba6b2f6af shaman]$ python
Python 3.6.8 (default, Sep 10 2021, 09:13:53)
[GCC 8.5.0 20210514 (Red Hat 8.5.0-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print(sys.path)
['', '/home/shaman/virtualenv/lib64/python36.zip', '/home/shaman/virtualenv/lib64/python3.6', '/home/shaman/virtualenv/lib64/python3.6/lib-dynload', '/usr/lib64/python3.6', '/usr/lib/python3.6', '/home/shaman/virtualenv/lib/python3.6/site-packages', '/home/shaman/shaman']

[dmick]

Why do you think that pecan has a populate command? Edit: oh, as @rakshithakamath94 points out, it's a custom Pecan command added by shaman to populate the postgresql database, I see

[rakshithakamath94]

Please check if you have cloned the branch python3 if not please go ahead and do that.

Here's what I did which worked for me. Let me know if it works for you!

pip3 install -r requirements.txt
python3 setup.py install
export ALEMBIC_CONFIG="alembic.ini"
export PECAN_CONFIG="config/dev.py"
cp -rf alembic.ini /usr/local/lib/python3.11/site-packages/shaman-0.1-py3.11.egg/
pecan populate config/dev.py
pecan serve config/run.py

[bugwz]

Thanks~ @rakshithakamath94 @dmick

I checkout python3 branch, and it's ok to run following cmds.

rm -rf ~/virtualenv
virtualenv ~/virtualenv
source ~/virtualenv/bin/activate

# Some changed for `config/run.py` and `config/dev.py`
# ...

pip install -r requirements.txt
pip install "cherrypy>=3.8.0,<9.0.0"
python setup.py develop
pecan populate config/dev.py
pecan serve config/run.py

Additional information:

When i test that, i found the cmd pip install "cherrypy>=3.8.0,<9.0.0" is necessary, otherwise, will result the error:

ModuleNotFoundError: No module named 'cherrypy'

I think we can add this dependency, what do you think?

[rakshithakamath94]

yes will add it

[rakshithakamath94]

so the application is running?

[bugwz]

@rakshithakamath94 yeah, it works. I created a PR to fix the dep problem of cherrypy https://github.com/ceph/shaman/pull/136

[gpingxu]

What changes did you make to config? I am currently facing this issue and installing Cherrypy has not resolved it