justin
3221f7abe8
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Most current systems (default Debian/Ubuntu, recent macOS) install Python only as `python3`, with no bare `python` on PATH, so learners who copied `python cli.py ...` into their host shell hit "command not found". Convert host-shell `python <cmd>` -> `python3 <cmd>` across module/lab READMEs, lab `.py` docstrings & usage strings, blog posts, lab prompt and instruction files, the M04 verify.sh message, and the M10/M24 lab patches. Module 01's convention note (and its blog/02 mirror) is rewritten so `python3` is canonical and `python` is the documented fallback. Stop-lines respected: Docker image tags (`python:3.12-slim`), `.venv/.../python` and `...\.venv\Scripts\python.exe` paths, the M20 `"command": "python"` teaching example and surrounding venv prose, container-internal invocations (M16/M18 Dockerfiles, M16 README `docker run` examples), and CI-workflow `run:` steps fed by `actions/setup-python` / `image: python:3.12` are left as `python` on purpose. pip was left out of scope: most occurrences are prose or CI/container-internal, and `pip3` does not fix the PEP 668 externally-managed-environment refusal that the course already addresses with venvs. The M01 note is worded to stay consistent with bare `pip` (use whichever pip pairs with your Python). Build (tools/build_wiki.py) and tools/check.sh both pass. Closes #104 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GAEzanEoGJT5o1VizQar47
63 lines
1.5 KiB
Python
63 lines
1.5 KiB
Python
"""Tiny command-line front end for the demo task app.
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Run it:
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python3 cli.py add "write the lesson"
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python3 cli.py list
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python3 cli.py done 0
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State is kept in tasks.json next to this file. The `done` command turns a bad index into a
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clean error message and a non-zero exit code; note that behavior before you review the AI
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change, so you can tell if the change quietly alters it.
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"""
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import json
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import sys
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from pathlib import Path
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from tasks import Task, TaskList
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STATE = Path(__file__).parent / "tasks.json"
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def load() -> TaskList:
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if not STATE.exists():
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return TaskList()
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raw = json.loads(STATE.read_text())
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return TaskList(tasks=[Task(**t) for t in raw])
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def save(tlist: TaskList) -> None:
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STATE.write_text(json.dumps([t.__dict__ for t in tlist.tasks], indent=2))
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def main(argv: list[str]) -> int:
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tlist = load()
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if not argv:
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print("usage: python3 cli.py [add <title> | list | done <index>]")
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return 1
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command = argv[0]
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if command == "add":
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title = " ".join(argv[1:])
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tlist.add(title)
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save(tlist)
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print(f"added: {title}")
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elif command == "list":
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print(tlist.render())
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elif command == "done":
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try:
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tlist.complete(int(argv[1]))
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except IndexError as exc:
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print(f"error: {exc}")
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return 1
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save(tlist)
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print("updated")
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else:
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print(f"unknown command: {command}")
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return 1
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return 0
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if __name__ == "__main__":
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raise SystemExit(main(sys.argv[1:]))
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