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Wrap external imports (httpx, dotenv) in a try/except block to catch `ImportError` and provide a friendly, actionable error message advising users to run `uv sync`. This prevents raw tracebacks for first-time users. Co-authored-by: abhimehro <84992105+abhimehro@users.noreply.github.com>
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Summary of ChangesHello @abhimehro, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly improves the initial user experience by gracefully handling missing Python dependencies. Instead of presenting a raw Highlights
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Code Review
This pull request improves the user experience by providing a clear error message when required dependencies are missing. The change wraps the third-party imports in a try...except block, which is a good approach. I've added one suggestion to make the new error message consistent with the rest of the script's color handling by respecting the NO_COLOR standard. Overall, this is a valuable improvement.
| sys.stderr.write("\033[91m❌ Error: Missing dependencies.\033[0m\n") | ||
| sys.stderr.write("Please run:\n") | ||
| sys.stderr.write(" \033[1muv sync\033[0m\n") |
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The new error message for missing dependencies uses hardcoded ANSI color codes. While this avoids extra dependencies, it doesn't respect the NO_COLOR environment variable or check if stderr is a TTY. The rest of the script does handle this (see lines 49-53), so for consistency and to avoid printing raw escape codes in non-TTY environments (like log files), it would be better to add a check here as well.
| sys.stderr.write("\033[91m❌ Error: Missing dependencies.\033[0m\n") | |
| sys.stderr.write("Please run:\n") | |
| sys.stderr.write(" \033[1muv sync\033[0m\n") | |
| use_colors = not os.getenv("NO_COLOR") and sys.stderr.isatty() | |
| RED = "\033[91m" if use_colors else "" | |
| BOLD = "\033[1m" if use_colors else "" | |
| ENDC = "\033[0m" if use_colors else "" | |
| sys.stderr.write(f"{RED}❌ Error: Missing dependencies.{ENDC}\n") | |
| sys.stderr.write("Please run:\n") | |
| sys.stderr.write(f" {BOLD}uv sync{ENDC}\n") |
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Pull request overview
Improves the user experience when running main.py without installed dependencies by intercepting missing-import errors and printing an actionable instruction instead of a traceback.
Changes:
- Wraps
httpxandpython-dotenvimports in atry/exceptto emit a friendly “runuv sync” message on missing dependencies. - Adds a short journal entry documenting the rationale and approach for dependency-related CLI errors.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| main.py | Adds early import error handling to replace raw ModuleNotFoundError tracebacks with an actionable CLI message. |
| .jules/palette.md | Documents the “friendly missing dependency” UX pattern as a Palette journal entry. |
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| # Use raw ANSI codes for simple, dependency-free coloring | ||
| sys.stderr.write("\033[91m❌ Error: Missing dependencies.\033[0m\n") | ||
| sys.stderr.write("Please run:\n") | ||
| sys.stderr.write(" \033[1muv sync\033[0m\n") | ||
| sys.exit(1) |
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The ImportError fallback prints raw ANSI escape codes unconditionally, which bypasses this script’s existing NO_COLOR / TTY color handling (later via USE_COLORS/Colors). This can produce unreadable output when NO_COLOR is set or when stderr is not a TTY (e.g., logs/CI). Consider detecting NO_COLOR and/or isatty here and omitting escape codes when coloring shouldn’t be used.
| except ImportError: | ||
| # Use raw ANSI codes for simple, dependency-free coloring | ||
| sys.stderr.write("\033[91m❌ Error: Missing dependencies.\033[0m\n") | ||
| sys.stderr.write("Please run:\n") | ||
| sys.stderr.write(" \033[1muv sync\033[0m\n") | ||
| sys.exit(1) |
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Catching a broad ImportError here can also swallow ImportErrors thrown from inside httpx/python-dotenv (e.g., environment/compat issues), and then the script exits with a “missing dependencies” message that may be misleading. Consider catching ModuleNotFoundError and checking the missing module name (httpx/dotenv), and otherwise re-raising the original exception (or at least including the original exception details in the message).
| except ImportError: | |
| # Use raw ANSI codes for simple, dependency-free coloring | |
| sys.stderr.write("\033[91m❌ Error: Missing dependencies.\033[0m\n") | |
| sys.stderr.write("Please run:\n") | |
| sys.stderr.write(" \033[1muv sync\033[0m\n") | |
| sys.exit(1) | |
| except ModuleNotFoundError as exc: | |
| missing = getattr(exc, "name", None) | |
| if missing in ("httpx", "dotenv"): | |
| # Use raw ANSI codes for simple, dependency-free coloring | |
| sys.stderr.write("\033[91m❌ Error: Missing dependencies.\033[0m\n") | |
| sys.stderr.write("Please run:\n") | |
| sys.stderr.write(" \033[1muv sync\033[0m\n") | |
| sys.stderr.write(f"Details: {exc}\n") | |
| sys.exit(1) | |
| # If the missing module is not httpx/dotenv, re-raise so the real issue is visible | |
| raise |
1 participant
🎨 Palette: Improve missing dependency error
💡 What:
Wrapped
httpxandpython-dotenvimports inmain.pywith atry/except ImportErrorblock.🎯 Why:
Users running the script directly (
python main.py) without setting up the environment encounter a rawModuleNotFoundError. This change intercepts that error and provides a clear instruction to runuv sync.📸 Before:
📸 After:
♿ Accessibility:
Improved CLI accessibility by making error messages readable and actionable.
PR created automatically by Jules for task 12942988716419053347 started by @abhimehro