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Neo4j graph academy - building neo4j applications with python - no .env file

I'm doing the building Neo4j applications with Python course on Neo4j's GraphAcademy and am stuck early in the process with Setting Environment Variables. I've installed the dependencies (FLASK etc.) but don't seem to have an .env file for the next part...
Setting Environment Variables
This project will read environment variables from the .env file located in the project root.
The project contains an example file at .env.example. You can run the following command in your terminal window to copy the example file to .env.
cp .env.example .env
But when I try to run this in the shell I get the following error:
cp: .env.example: No such file or directory
I don't seem to have a .env file in any of the newly created folders in the sandbox. Can anyone help with this?

For me, this worked:
Clone the git repository that provides the scaffolding
git clone https://github.com/neo4j-graphacademy/app-python.git
Change directory to be in the newly checked project root folder.
This step is not explicitly mentioned in the graph academy course.
cd app-python
Copy the template env file
cp .env.example .env
Inspect the file to make sure it looks right
cat .env
which printed
FLASK_APP=api
FLASK_ENV=development
FLASK_RUN_PORT=3000
NEO4J_URI=neo4j://localhost:7687
NEO4J_USERNAME=neo4j
NEO4J_PASSWORD=neo
JWT_SECRET=secret
SALT_ROUNDS=10
If you still can't get it to work, let me know which step fails and with which error.

How can I customize Repl.it to not use poetry?

I am trying to create a Repl.it on my Python project, and when I run, it fails at not finding [tool.poetry] section. And yes my project has a pyproject.toml file.
Repl.it: Updating package configuration
--> /usr/local/bin/python3 -m poetry add halo vistir distlib click packaging tomlkit pip-shims pythonfinder python-cfonts appdirs
[RuntimeError]
[tool.poetry] section not found in pyproject.toml
add [-D|--dev] [--git GIT] [--path PATH] [-E|--extras EXTRAS] [--optional] [--python PYTHON] [--platform PLATFORM] [--allow-prereleases] [--dry-run] [--] <name> (<name>)...
exit status 1
Repl.it: Package operation failed.
The question is, how can I know what is happening in the initializing stage, how does it know what dependencies to install and how can I change the behavior? You can try this repo: github/frostming/pdm for reproduction.

After importing project you could specify run button behaviour with bash command:
This will be saved to .replit. You could write tings like pip3 install -r requirements.txt && python3 main.py. Read more about available settings in .replit docs
Also there is another doc about dependencies with following quote:
In a pyproject.toml file, you list your packages along with other
details about your project. For example, consider the following
snippet from pyproject.toml:
...
[tool.poetry.dependencies]
python = "^3.8"
flask = "^1.1"
...

How to Install Private Python Package in Docker image build

my goal is to dockerize python 3.6 web application.
During my work I developed private python package ('VmwareProviderBL') that my web application is using.
Build my docker image working perfectly, but when I am trying to run it, I get an error saying my private Python package is not found.
My Dockerfile
# Use an official Python runtime as a parent image
FROM python:3.6-slim
# Set the working directory to /app
WORKDIR /app
# Copy the current directory contents into the container at /app
ADD . /app
# Install any needed packages specified in requirements.txt
RUN pip install -r requirements.txt
# Make port 80 available to the world outside this container
EXPOSE 80
# Define environment variable
ENV NAME World
# Run WebController.py when the container launches
CMD ["python", "WebApi/WebController.py"]
My Error when trying to run the image
Traceback (most recent call last):
File "WebApi/WebController.py", line 3, in <module>
from VmwareProviderBL import SnapshotBL, MachineBL, Utils
ModuleNotFoundError: No module named 'VmwareProviderBL'
My package hierarchy
--VmwareVirtualMachineProvider
--WebApi
--VmwareProviderBL
--requirements
--Dockerfile
Any ideas anyone?
I know I need somehow to add this package to my Dockerfile, did not find any example online.

When you import a module, Python looks in (a) the built-in path (sys.path), (b) locations in the PYTHONPATH variable, and (c) in the directory containing the script you're running.
You're installing the requirements for your module (pip install -r requirements.txt), but you're never installing the VmwareProviderBL module itself. This means it's not going to be available in (a) above. The script you're running (WebApi/WebController.py) isn't located in the same directory as the VmwareProviderBL module, so that rules out (c).
The best way of solving this problem would be to include a setup.py file in your project so that you could simply pip install . to install both the requirements and the module itself.
You could also modify the PYTHONPATH environment variable to include the directory that contains the VmwareProviderBL module. For example, add to your Dockerfile:
ENV PYTHONPATH=/app

Travis CI giving error to a test in which it was previously building successfully

Travis CI showed a weird behaviour after I tried to integrate with coverage. Before trying to use coverage the build was okay with all the tests. Now suddenly it doesn't locate the file
here is the .travis.yml file
#language to use for app
language: python
-- "3.6"
script:
- virtualEnv/run_travis.sh
# whitelist
branches:
only:
- master
- flask_dev_branch
#dependacies and libraries to install
install: pip install -r virtualEnv/requirements.txt
after_success:
- coveralls
And the file run_travis.sh
#!/usr/bin/env bash
python tests/test_shopping_cart.py > /dev/null &
nosetests --with-coverage
Also an image of the directory with the files included
All this started happening after trying to configure coverage.

Your tests subdirectory is inside virtualEnv and the current directory is the parent of virtualEnv. Run
python virtualEnv/tests/test_shopping_cart.py
PS. And please don't show screenshots — copy text.

I guess the requirements.txt is not in the virtualEnv directory.

How to use Travis CI with some files in gitignore?

I have a Flask app that has its configurations in a file called settings.py. I've put this file in .gitignore because the project is in a public repo. Travis-CI was working before I added tests into my project even though settings.py was in .gitignore. After adding tests to the project, the build started failing with the following output:
Debugged import:
- 'settings' not found.
Original exception:
ImportError: No module named 'settings'
My .travis.yml file looks like this:
language: python
python:
- "3.4"
- "3.5"
# command to install dependencies
install:
- pip install -r requirements.txt
# command to run tests
script: python tests.py
Does this mean that in order to use travis-ci, we have to include all necessary files in the repo? Or is there a workaround? The repo on GitHub can be found here.

#dirn's comment of using a default settings.py file and then overriding some settings with encrypted environment variables on Travis is a good idea, certainly worth it if there are only a couple of differences.
However, if you can't be bothered or it's too complicated breaking up your settings, you could install the Ruby Travis command line client gem, which is useful for quite a few things.
With the client on your machine you can use Travis' file encryption feature to encrypt your whole settings.py file, and then commit the encrypted version (which will have an .enc file extension) to GitHub. Travis will then be able to decrypt the file during the CI run, as long as you add the right commands to the .travis.yml file, say in a before_install step. Detailed instructions are on the file encryption page.

I did a trick in .travis.yml
After commit and before Travis build, create the ignored file like this:
before_install:
- cp .ignored.file.copy ignored.file
This way, the build will succeed without the actual gitignore-ed file.