Welcome To My Py Sandbox

• Checkout the actual sandbox docs, where I study and also build the game "Attack On Monsters" here

  • Note I build it using the NeoVim editor

• Or checkout my flask apps docs here

Configuring a virtual environment (v-e)

Note: you are gonna have to create a v-e in both the sand-box and flask-app(s) folders(though I haven't installed any modules in the sand-box app)

• for this i'm using the virtualenv command

• STEPS TO CREATE VIRTUAL ENVIRONMENT

  • in the projects directory, at top level, run

      # if using the virtualenv package
      $ virtualenv venv
    
      # if using the default venv from python
      # on linux
      $ python3 -m venv venv

  • This should create a venv folder (which is the virtual environment)

  • Next, you have to activate the virtual environment. To do so, execute

      # for linux
      $ source venv/bin/activate

    • Deactivate it by simply executing the deactivate on your terminal

  • you should see you file path look similar to this

      (venv) username@computer:~/full/path/py-sandbox/which-ever-path-you-on/$

  • You should be able to safely install packages with pip

• Now, to install the packages in requirements.txt file of that folder, execute

    $ pip install -r requirements.txt
    # the -r means it should read from the requirements.txt file

• ADDING YOUR OWN PACKAGES

  • After every package installation, I advice you update the requirements.txt file with

      $ pip freeze > requirements.txt
      # it's like package.json in JavaScript, but for python

  • you should even combine the installation command with the freeze command like so to execute all at once

      pip install `module_name` && pip freeze > requirements.txt

  • use pip list --local to see all locally installed modules in your virtual env

Cool new commands

• >>

  • to use with command like echo or pip freeze to add content to the end of a file

• Example

  • echo "some text content" >> test_file.txt to add the text "some text content" to the test_file.txt. this file will be created if not exit

• >

  • Same as the >> pattern above but will completely replace the content of the file

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Cool command combo

• find . -type d -name "__pycache__" -exec rm -rf {} +

  • to find and delete all "pycache" folders in the current working directory

• Explanation

  • find . : Start searching from the current directory (.)
  • -type d : Look for directories (d)
  • -name "__pycache__" : Match directories named "pycache"
  • -exec rm -rf {} + : For each found directory, execute the rm -rf command on it ({} is replaced by the found directory paths)