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    Mission / Reproducible Python
    01 / 0235 active minuteslocal change

    Create A Reproducible Python Environment

    The training project runs in a dedicated environment whose dependencies are declared in Git while the environment directory itself remains untracked.

    Work herelocal / powershell or zsh or bash
    1. 1Understand
    2. 2Do
    3. 3Check
    4. 4Submit
    Learn firstConcept, example, trap and recovery

    Outcome#

    The training project runs in a dedicated environment whose dependencies are declared in Git while the environment directory itself remains untracked.

    Concept#

    Installing packages globally or into base makes projects interfere with one another and prevents collaborators from reproducing the environment.

    Worked Example#

    Python runs from the project .venv and Git reports that .venv is ignored.

    A correct example uses these decisions:

    • Should .venv be committed? No. It is reproducible local state and must remain ignored.
    • What proves the environment is active? The reported interpreter path is inside the project .venv.

    Common Trap#

    Creating the environment in Git-tracked files or installing into an unrelated global interpreter.

    If Blocked#

    Do not repeatedly reinstall into base. Record conda info --envs, the Python path, and the exact error without credentials. Use the reproducible Python lab or ask for help before deleting an existing environment.

    Useful references:

    Understand Before Accepting AI Output#

    An agent may suggest packages that are unnecessary, unmaintained, or fetched from an unapproved source. Review dependency purpose and project declarations before installation.

    Do the mission

    One bounded attempt

    Pass: 80% + every safety item
    Action

    Create the project virtual environment with the platform-specific command, activate it, and run the interpreter check.

    Expected

    Python runs from the project .venv and Git reports that .venv is ignored.

    Separate practice space

    Open this mission's safe practice files

    The launcher creates or validates a separate exercise folder. It stops rather than replacing an existing unrelated folder.

    Run only the commands for your machine

    Step 1windows / powershell
    py -3 -m venv .venv

    Expected: .venv is created without overwriting another path.

    Step 2macos / zsh
    python3 -m venv .venv

    Expected: .venv is created without overwriting another path.

    Step 3linux / bash
    python3 -m venv .venv

    Expected: .venv is created without overwriting another path.

    01Should .venv be committed?
    02What proves the environment is active?
    Before submitting
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