01_run_python_code.md

Example 1: Run Python Code Safely

When to Use

Read this when you need to run Python code in a sandbox for testing or execution.

User Request Pattern

Run this Python script in a sandbox to test it
Test this Python code safely
Execute this script in isolation

Workflow

Step 1: Validate E2B_API_KEY

cd .claude/skills/agent-sandboxes/sandbox_cli
grep "E2B_API_KEY" ../../../../.env

Step 2: Navigate to CLI Directory

cd .claude/skills/agent-sandboxes/sandbox_cli

Step 3: Initialize Sandbox and Capture ID

uv run sbx init
# Output: Created sandbox: sbx_abc123def456
# YOU remember: sandbox_id = "sbx_abc123def456"

Step 4: Write the Script

Using the captured sandbox ID:

uv run sbx files write sbx_abc123def456 /home/user/test.py "import sys; print(sys.version)"

Step 5: Run the Script

uv run sbx exec sbx_abc123def456 "python3 /home/user/test.py"

Step 6: Clean Up

uv run sbx sandbox kill sbx_abc123def456

Key Points

• Always capture and remember the sandbox ID from init output
• Use the captured ID directly in all subsequent commands
• Write files using sbx files write command
• Execute with sbx exec command
• Always clean up by killing the sandbox when done