Pyramid v2.0 Quick Tutorial has stopped working

[Brady Kelly]

I followed the official Quick Tutorial for Pyramid, up until Step 9: Organizing Views With View Classes. I meticulously followed a similar pattern of instructions for most steps:

- Copy the previous step's code to the new step - a new project with a Python package called "tutorial".

- Install requirements for the new project using "pip install -e ."
- Change the code from the previous step

- Change the tests from the previous step

- Run the new project with "pserve development.ini --reload"

I finished the View Classes step and the tests passed, and the app ran properly, as expected. I then took a break, during which my PC crashed and restarted. 

I then took up the tutorial on Step 10: Handling Web Requests and Responses, and followed all the above steps, just as I have successfully followed them for each previous step. I changed the code and tests, and the new tests pass, but when I try and run my app with "pserve development.ini --reload", a message gets printed:

Starting monitor for PID 16628.

Followed by a long traceback that ends with:

ModuleNotFoundError: No module named 'tutorial'

Press ENTER or change a file to reload

Now when I try and run the code for any of the tutorial's previous steps, that all worked before, I get the same error. This doesn't look like a simple missing package, because the package is present in the tutorial step's code, and all 5 unit and functional tests pass. What could be wrong that the code that 'pserve' runs can't find a 'tutorial' package?

Thank you

[Steve Piercy]

After your PC crashed, in your shell session did you also add the environment variable for the path to your virtual environment or activate the correct virtual environment?

See https://docs.pylonsproject.org/projects/pyramid/en/latest/quick_tutorial/requirements.html#set-an-environment-variable

There might be some other one-time steps at the start of the tutorial that need to be performed.

Please paste the traceback, too.

--steve

[Brady Kelly]

Yes, I set the environment variable PYRENV to  D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV  and was able to use that variable in my cmd commands to activate the virtual environment, and to run %PYRENV%\Scripts\pip install -e . which seemed to run correctly. I also use the environment variable to run the project with  %PYRENV%\Scripts\pserve development.ini --reload. 

The Traceback is:

Traceback (most recent call last):

  File "<string>", line 1, in <module>

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\hupper\ipc.py", line 319, in 

spawn_main

    func(**kwargs)

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\hupper\worker.py", line 252, 

in worker_main

    func(*spec_args, **spec_kwargs)

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\pyramid\scripts\pserve.py", line 30, in main

    return command.run()

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\pyramid\scripts\pserve.py", line 271, in run

    app = loader.get_wsgi_app(app_name, config_vars)

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\plaster_pastedeploy\__init__.py", line 125, in get_wsgi_app

    return loadapp(

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 253, in loadapp

    return loadobj(APP, uri, name=name, **kw)

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 275, in loadobj

    context = loadcontext(

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 299, in loadcontext

    return _loaders[scheme](

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 326, in _loadconfig

    return loader.get_context(object_type, name, global_conf)

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 457, in get_context

    context = self._context_from_use(

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 480, in _context_from_use

    context = self.get_context(

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 410, in get_context

    return loadcontext(object_type, name,

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 299, in loadcontext

    return _loaders[scheme](

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 334, in _loadegg

    return loader.get_context(object_type, name, global_conf)

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 624, in get_context

    entry_point, protocol, ep_name = self.find_egg_entry_point(

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\paste\deploy\loadwsgi.py", line 651, in find_egg_entry_point

    possible.append((entry.load(), protocol, entry.name))

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\pkg_resources\__init__.py", line 2450, in load

    return self.resolve()

  File "D:\Personal\PythonProjects\Pyramid\projects\quick_tutorial\ENV\lib\site-packages\pkg_resources\__init__.py", line 2456, in resolve

    module = __import__(self.module_name, fromlist=['__name__'], level=0)

ModuleNotFoundError: No module named 'tutorial'

Press ENTER or change a file to reload.

[Brady Kelly]

My apologies. Somewhere between running pip install -e . and trying to run my project I had lost my environment variable. All seems fine now - thank you very much.

On Saturday, 4 September 2021 at 22:26:05 UTC+2 Steve Piercy wrote: