python-playground

Python Playground

Run Python code in an isolated playground directory for testing and experimentation.

Instructions

1. First, ensure the playground directory exists: mkdir -p playground
2. Use the Write tool to create the Python file at playground/test.py
3. Run with: uv run playground/test.py to test cpython behavior or cargo run -- playground/test.py to test monty behavior

IMPORTANT: Use separate tool calls for each step - do NOT chain commands with && or use heredocs. This allows the pre-approved commands to work without prompting.

Example workflow

Step 1 - Create directory (Bash, already allowed):

mkdir -p playground

Step 2 - Write code (use Write tool, not cat): Write to playground/test.py:

def foo():
    raise ValueError('test')

foo()

Step 3 - Run script (Bash, already allowed):

uv run playground/test.py

Guidelines

• The playground/ directory is gitignored
• Use a different file name for each test you want to run, give the files recognizable names like test_value_error.py
• Use uv run ... to run scripts (uses project Python)
• Or, cargo run -- ... to run scripts using Monty
• Use Write tool for creating files (avoids permission prompts)
• Run mkdir and uv as separate commands (not chained)
• do NOT delete files from playground after you've finished testing