Clean-environment rebuild worksheet
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StatMedAnalysis | Downloadable worksheet | 5 November 2026

Find missing system or package dependencies by rebuilding an analysis in an
empty environment.

Working instructions
Start in a new temporary workspace with a fresh virtual environment. Record the
interpreter and platform. Install only the declared dependencies and run the
documented entry point on a synthetic fixture. Log the first missing
prerequisite before changing the environment.

Working record
Save a local copy. Use public, hypothetical or aggregate information.
Project code ____________________   Prepared on ____________________

Source revision and dependency manifest
___________________________________________________________________

Interpreter path, version and operating system
___________________________________________________________________

External executable or system library versions
___________________________________________________________________

Installation command and lockfile identity
___________________________________________________________________

Synthetic fixture and expected output
___________________________________________________________________

First clean-run failure with operation
___________________________________________________________________

Changed declaration and second clean-run result
___________________________________________________________________

Residual platform-specific constraints
___________________________________________________________________

Hypothetical worked case
A fictional script imports a plotting package available in the developer’s
global environment. Its first fresh run fails during import. Add the missing
dependency to the manifest and retry in a second clean environment to confirm
the repair.

Decision and follow-up
Pass when the documented procedure succeeds in a fresh, supported environment
and reproduces the fixture within the declared tolerance. A working machine
with undeclared global packages cannot establish portability.

Decision _______________________   Date ___________________________
Evidence retained at _____________________________________________
Next action ____________________   Owner __________________________

Official reference checked 5 November 2026
https://docs.python.org/3/library/venv.html