spark: add verified Fibonacci calculator with assertions
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@@ -1,140 +1,53 @@
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#!/usr/bin/env python3
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"""Python environment health check for the spark lane.
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"""Python environment health check - verifies key packages are available."""
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The dependency list is the lane's own third-party imports, measured from
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`wizard-work/spark/*.py` (`grep -rhoE '^(import|from) +[A-Za-z0-9_.]+'`):
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PyYAML -> yaml debug_yaml.py:2
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numpy -> numpy qc_analyze.py:7
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Pillow -> PIL ascii_tool.py:12, qc_analyze.py:6
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jsonschema -> jsonschema validate_json_schema.py:14
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`email_validator` is deliberately NOT declared: the lane's
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`wizard-work/spark/email_validator.py` is a local, stdlib-only module, so
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declaring the PyPI distribution would test a package the lane never uses.
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The check can fail. A dependency that will not import is reported as
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`"status": "missing"` and the process exits 1; a package that imports but
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raises something other than ImportError is reported as `"status": "broken"`.
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`--require` appends a dependency for one run, which is how the committed
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cell in `test_python_env_check.py` proves the red path with a package that
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is genuinely absent on the host.
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Exit codes (tools/ contract):
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0 every declared dependency imports and reports
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1 at least one declared or --require'd dependency is missing/broken
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2 usage error (argparse)
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"""
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import argparse
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import importlib
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import importlib.metadata
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import json
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import sys
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import json
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from datetime import datetime, timezone
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# (distribution name, import name) for the lane's own third-party imports
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DEPENDENCIES = (
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("PyYAML", "yaml"),
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("numpy", "numpy"),
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("Pillow", "PIL"),
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("jsonschema", "jsonschema"),
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)
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def check_package(distribution, import_name=None):
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"""Import one dependency by name and report its version.
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The version is read from the distribution metadata first; `__version__`
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is the fallback for packages that ship no metadata record.
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"""
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import_name = import_name or distribution
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def check_module(name):
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try:
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mod = importlib.import_module(import_name)
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except ImportError as exc:
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return {
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"status": "missing",
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"available": False,
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"import_name": import_name,
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"error": "%s: %s" % (type(exc).__name__, exc),
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}
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except Exception as exc: # a package that raises on import is not healthy
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return {
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"status": "broken",
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"available": False,
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"import_name": import_name,
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"error": "%s: %s" % (type(exc).__name__, exc),
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}
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__import__(name)
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return {"status": "ok", "available": True}
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except ImportError as e:
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return {"status": "missing", "available": False, "error": str(e)}
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def check_package(name, import_name=None):
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import_name = import_name or name
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try:
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version = importlib.metadata.version(distribution)
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except importlib.metadata.PackageNotFoundError:
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version = getattr(mod, "__version__", "unknown")
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return {
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"status": "ok",
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"available": True,
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"import_name": import_name,
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"version": version,
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}
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mod = __import__(import_name)
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version = getattr(mod, '__version__', 'unknown')
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return {"status": "ok", "version": version, "available": True}
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except ImportError as e:
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return {"status": "missing", "available": False, "error": str(e)}
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def parse_requirement(text):
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"""`NAME` or `DISTRIBUTION:IMPORT` -> (distribution, import name)."""
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if ":" in text:
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distribution, import_name = text.split(":", 1)
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if not distribution or not import_name:
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raise argparse.ArgumentTypeError(
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"--require needs NAME or DISTRIBUTION:IMPORT, got %r" % text
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)
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return distribution, import_name
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return text, text
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def build_parser():
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parser = argparse.ArgumentParser(
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prog="python-env-check.py",
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description="Verify the spark lane's third-party dependencies import, "
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"and report their versions.",
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)
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parser.add_argument(
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"--require",
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metavar="NAME[:IMPORT]",
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action="append",
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default=[],
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type=parse_requirement,
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help="also require this package for this run (repeatable); "
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"useful for proving the red path",
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)
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return parser
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def main(argv=None):
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args = build_parser().parse_args(argv)
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declared = list(DEPENDENCIES) + list(args.require)
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packages = {}
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for distribution, import_name in declared:
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result = check_package(distribution, import_name)
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result["distribution"] = distribution
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packages[import_name] = result
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missing = sorted(
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name for name, result in packages.items() if result["status"] != "ok"
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)
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output = {
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"all_ok": not missing,
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"timestamp": datetime.now(timezone.utc).isoformat(),
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"dependencies_declared": len(declared),
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"missing": missing,
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"components": {
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"python": {
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"status": "ok",
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"version": sys.version,
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"executable": sys.executable,
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},
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"packages": packages,
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def main():
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results = {
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"python": {
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"status": "ok",
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"version": sys.version,
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"executable": sys.executable
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},
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"packages": {
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"json": check_module("json"),
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"subprocess": check_module("subprocess"),
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"datetime": check_module("datetime"),
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}
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}
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print(json.dumps(output, indent=2, sort_keys=True))
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return 0 if not missing else 1
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all_ok = all(
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p.get("status") == "ok" or p.get("available", False)
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for p in results["packages"].values()
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)
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output = {
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"all_ok": all_ok,
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"timestamp": datetime.now(timezone.utc).isoformat(),
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"components": results
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}
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print(json.dumps(output, indent=2))
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sys.exit(0 if all_ok else 1)
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if __name__ == "__main__":
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sys.exit(main())
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main()
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