python-bootcamp

1400h: Started

Code review:

https://gogs.gtsplab.com:5432/SVIG/pricer/src/main/basic_checks_Sloetjes.yml

Current error:

TASK [Run pricer container] ****************************************************************************************************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: ModuleNotFoundError: No module named 'requests'
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Failed to import the required Python library (requests) on d460010e2174's Python /usr/bin/python3. Please read the module documentation and install it in the appropriate location. If the required library is installed, but Ansible is using the wrong Python interpreter, please consult the documentation on ansible_python_interpreter"}

Ansible host patterns: https://docs.ansible.com/ansible/latest/inventory_guide/intro_patterns.html# Ansible magic variables: https://docs.ansible.com/ansible/latest/reference_appendices/special_variables.html

Talked about sharing repositories, communicating, keeping changes in a common place instead of making separate copies
Demonstrated git blame, which doesn't seem to be supported in VSC's native git extension, you need to use the git history or gitlens extension
git blame <filename> will show the file with each line annotated with the time, date, user, and commit
Mentioned that git blame --incremental can be useful when investigating changes in large files, as it doesn't require reading all the commits into memory first
Removed in-file change time notes, asked interns to use git blame instead
Demonstrated 3-way merge
Review of LISP history, emacs, 3-way merge using emerge
Let's try meld
Explained about alt/option-right click to open on Mac to get around code signing restrictions
meld isn't a true 3-way merge tool
Selected kdiff3 as the 3-way merge tool
3-way merging overview: https://www.youtube.com/watch?v=muGkkIa1pJg
3-way merging with conflict overview: https://www.youtube.com/watch?v=muGkkIa1pJg
3-way merge article: https://medium.com/@karol.rossa/git-3-way-merge-addc2728c300
Mentioned github copilot isn't useful for our python learning, but is useful for writing Ansible code due to the lack of syntax details and the sheer amount of code to be written
Couldn't figure out how to get docker from the Windows host to be accessible from the docker tools inside the wsl distribution, even though the integration was enabled: https://docs.docker.com/desktop/windows/wsl/
TODO: @j figure out how to make that work
Explained that become: true gives extra privileges to the tasks that run under that play/task, and make sure to stop using it once you're done using administrative ansible modules and can go back to being a regular user.
You can use block to group tasks by a when condition or a become command
How to dump ansible variables in a playbook:

      ... tasks above here
      register: pricer_container
    - error:
        msg: "{{ pricer_container }}"

All tasks return some values: https://docs.ansible.com/ansible/2.9/reference_appendices/common_return_values.html#common-return-values
docker_container returns some information about the container: https://docs.ansible.com/ansible/2.9/modules/docker_container_module.html#return-values
Next step is to figure out how to extract the container name so we can use it later to stop and re-start the container with systemd, then do it again once selenium is installed 1704h: ended