Python Configuration

Setting the environment (python)

To keep a consistent environment for python, the following are set:

• PYTHONOPTIMIZE

  0, When developing, exceptions, docstrings and breakpoints are wanted!

• PYTHONUNBUFFERED

  1, Reduce need to call flush and avoid headaches in general

• PYTHONDONTWRITEBYTECODE

  1, Don’t pollute the source tree with __pycache__ directories

• PYTHONHASHSEED

  42, Reproducible hashes, if you have to ask why 42, hand in your geek badge!

• PYTHONIOENCODING

  utf8, Default to UTF-8 encoding

• PYTHONASYNCIODEBUG

  1, Enable asynchronous debugging (required when developing async components)

• PYTHONDEVMODE

  1, Toogle sys.flags.dev_mode attribute on

  and also enables extra run time checks

• PYTHONUTF8

  1, Default file encoding

Configuration (bash)

Define constants (bash)

Assuming bash constants has been followed:

~ $ printf "\\n# Developer environment (python)\\n\\n" >> $RC
~ $ printf "export PYTHONOPTIMIZE=0\n" >> $RC
~ $ printf "export PYTHONUNBUFFERED=1\n" >> $RC
~ $ printf "export PYTHONDONTWRITEBYTECODE=1\n" >> $RC
~ $ printf "export PYTHONHASHSEED=42\n" >> $RC
~ $ printf "export PYTHONIOENCODING=utf8\n" >> $RC
~ $ printf "export PYTHONASYNCIODEBUG=1\n" >> $RC
~ $ printf "export PYTHONUTF8=1\n" >> $RC
~ $ printf "export PYTHONDEVMODE=1\n" >> $RC

Define virtual environment root directory (PY_VENV_DIR)

Note

The following are optional

Define the root directory for all virtual environment installations.

~ $ printf "export PY_VENV_DIR=\$PREFIX/.share/virtualenvs\\n" >> $RC

Congratulations, a python baseline environment is now defined!