README.md

title	Coding Environment Server
emoji	💻
colorFrom	blue
colorTo	blue
sdk	docker
pinned	false
app_port	8000
base_path	/web
tags	openenv

Coding Environment

A Python code execution environment that runs arbitrary Python code and returns results. Perfect for testing code execution infrastructure and demonstrating environment usage patterns.

Quick Start

The simplest way to use the Coding environment is through the CodingEnv class:

from envs.coding_env import CodeAction, CodingEnv

try:
    # Create environment from Docker image
    coding_env = CodingEnv.from_docker_image("coding-env:latest")

    # Reset
    result = coding_env.reset()
    print(f"Reset complete: exit_code={result.observation.exit_code}")

    # Execute Python code
    code_samples = [
        "print('Hello, World!')",
        "x = 5 + 3\nprint(f'Result: {x}')",
        "import math\nprint(math.pi)"
    ]

    for code in code_samples:
        result = coding_env.step(CodeAction(code=code))
        print(f"Code: {code}")
        print(f"  → stdout: {result.observation.stdout.strip()}")
        print(f"  → exit_code: {result.observation.exit_code}")

finally:
    # Always clean up
    coding_env.close()

That's it! The CodingEnv.from_docker_image() method handles:

• Starting the Docker container
• Waiting for the server to be ready
• Connecting to the environment
• Container cleanup when you call close()

Building the Docker Image

Before using the environment, you need to build the Docker image:

# From project root
docker build -t coding-env:latest -f src/envs/coding_env/server/Dockerfile .

Environment Details

Action

CodeAction: Contains a single field

• code (str) - The Python code to execute

Observation

CodeObservation: Contains the execution results

• stdout (str) - Standard output from code execution
• stderr (str) - Standard error from code execution
• exit_code (int) - Exit code (0 for success, non-zero for errors)

State

CodeState: Tracks execution state

• episode_id (str) - Unique identifier for the episode
• step_count (int) - Number of steps taken
• last_exit_code (int) - Exit code from the last execution

Advanced Usage

Connecting to an Existing Server

If you already have a Coding environment server running, you can connect directly:

from envs.coding_env import CodingEnv

# Connect to existing server
coding_env = CodingEnv(base_url="<ENV_HTTP_URL_HERE>")

# Use as normal
result = coding_env.reset()
result = coding_env.step(CodeAction(code="print('Hello!')"))

Note: When connecting to an existing server, coding_env.close() will NOT stop the server.

Development & Testing

Running the Full Example

Run the complete example that demonstrates the full workflow:

python3 src/envs/coding_env/client/example_usage.py

This example shows:

• Creating an environment from a Docker image
• Resetting and executing code through the environment
• Automatic cleanup with close()

Project Structure

coding_env/
├── README.md              # This file
├── models.py              # Action, Observation, and State models
├── client/
│   ├── coding_env_client.py  # CodingEnv client implementation
│   └── example_usage.py      # Usage examples
└── server/
    ├── python_codeact_env.py  # Core environment logic
    ├── app.py                 # FastAPI application
    ├── transforms.py          # Observation transforms
    ├── Dockerfile             # Container image definition
    └── README.md              # Server-specific documentation