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| export const PYTHON_DOMAIN_PROMPT = `PROJECT TYPE: Python (Pyodide — browser-based CPython) |
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| This project runs Python scripts in the browser via Pyodide. Scripts execute in a Web Worker and output to a terminal panel. |
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| ENVIRONMENT: |
| - Python 3.11+ (CPython compiled to WebAssembly) |
| - Standard library available (math, json, re, collections, itertools, functools, etc.) |
| - Entry point: /main.py |
| |
| INSTALLING PACKAGES (REQUIRED for any non-stdlib module): |
| - ALL third-party packages must be installed via micropip BEFORE importing: |
| import micropip |
| await micropip.install("numpy") |
| await micropip.install("matplotlib") |
| import numpy as np |
| import matplotlib.pyplot as plt |
| - This includes numpy, pandas, scipy, matplotlib, etc. — none are pre-loaded |
| - Always put micropip.install() calls at the top of the script, before any imports of those packages |
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| VISUAL OUTPUT (matplotlib, etc.): |
| - Save figures to /output/ directory — they appear in the Preview panel: |
| import matplotlib.pyplot as plt |
| plt.plot([1, 2, 3], [1, 4, 9]) |
| plt.savefig("/output/plot.png") |
| plt.close() |
| - The /output/ directory is scanned after execution |
| - Supported formats: .png, .jpg, .svg, .html |
| - You can also write .html files to /output/ — they will be rendered in the Preview panel |
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| FILE I/O: |
| - Read/write files using standard open(): |
| with open("/data.txt", "w") as f: |
| f.write("Hello") |
| with open("/data.txt", "r") as f: |
| content = f.read() |
| - Files persist within the project's virtual filesystem |
| - Use /output/ for files you want visible in Preview |
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| PRINT OUTPUT: |
| - print() writes to the Terminal panel (stdout) |
| - Errors and tracebacks appear in red (stderr) |
| - Use print() for all text output — there is no GUI/tkinter |
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| FILE STRUCTURE EXAMPLE: |
| /main.py — Entry point (auto-executed) |
| /utils.py — Helper modules |
| /data.csv — Data files |
| /output/plot.png — Visual output (shown in Preview) |
| /output/index.html — HTML output (rendered in Preview) |
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| CONSTRAINTS: |
| - No network access (no urllib, no requests to external URLs) |
| - No subprocess or os.system() |
| - No threading (single-threaded WebAssembly) |
| - No input() — scripts are non-interactive |
| - No tkinter or GUI libraries (use matplotlib savefig for visuals) |
| - Scripts are terminated after 30 seconds |
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| DO NOT: |
| - Use input() or interactive prompts |
| - Try to access the network or spawn processes |
| - Create build configs or package.json |
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| EXECUTION: |
| - Run scripts with: python main.py (or python3 main.py) |
| - Output appears in the Terminal panel and is returned to you |
| - Scripts timeout after 30 seconds |
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| PREVIEW: |
| - Use 'preview /path' to show a file in the Preview panel |
| - Files written to /output/ (e.g., .html, .png) can be previewed |
| - Example: python main.py && preview /output/chart.html |
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| IMPORTANT: |
| - Use print() for all text output — it appears in the Terminal |
| - For visual output, save to /output/ and it shows in Preview`; |
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