Edgen Python API library

The Edgen Python is a clone of the official OpenAI Python library. It provides convenient access to the Edgen REST API from any Python 3.7+ application. The library includes type definitions for all request params and response fields, and offers both synchronous and asynchronous clients powered by httpx.

The original library was generated from the OpenAPI specification with Stainless.

Documentation

The API documentation can be found here.

Installation

pip install edgen

Usage

The full API of this library can be found in api.md.

import os
from edgen import Edgen

client = Edgen(
    base_url=os.environ.get("EDGEN_BASE_URL"), # this is default and can be omitted
)

chat_completion = client.chat.completions.create(
    messages=[
        {
            "role": "user",
            "content": "Say this is a test",
        }
    ],
    model="ignore",
)

Note that, in the current version, the model is ignored. The model per endpoint is chosen in the edgen-server. However, the model element must be present for compatibility with the OpenAI spec.

Async usage

Simply import AsyncEdgen instead of Edgen and use await with each API call:

import os
import asyncio
from edgen import AsyncEdgen

client = AsyncEdgen()

async def main() -> None:
    chat_completion = await client.chat.completions.create(
        messages=[
            {
                "role": "user",
                "content": "Say this is a test",
            }
        ],
        model="ignore",
    )


asyncio.run(main())

Functionality between the synchronous and asynchronous clients is otherwise identical.

Streaming Responses

We provide support for streaming responses using Server Side Events (SSE).

from edgen import Edgen

client = Edgen()

stream = client.chat.completions.create(
    model="ignore",
    messages=[{"role": "user", "content": "Say this is a test"}],
    stream=True,
)
for chunk in stream:
    print(chunk.choices[0].delta.content or "", end="")

The async client uses the exact same interface.

from edgen import AsyncEdgen

client = AsyncEdgen()


async def main():
    stream = await client.chat.completions.create(
        model="ignore",
        messages=[{"role": "user", "content": "Say this is a test"}],
        stream=True,
    )
    async for chunk in stream:
        print(chunk.choices[0].delta.content or "", end="")


asyncio.run(main())

Using types

Nested request parameters are TypedDicts. Responses are Pydantic models, which provide helper methods for things like:

• Serializing back into JSON, model.model_dump_json(indent=2, exclude_unset=True)
• Converting to a dictionary, model.model_dump(exclude_unset=True)

Typed requests and responses provide autocomplete and documentation within your editor. If you would like to see type errors in VS Code to help catch bugs earlier, set python.analysis.typeCheckingMode to basic.

Remove await for non-async usage.

## Nested params

Nested parameters are dictionaries, typed using `TypedDict`, for example:

```python
from edgen import Edgen

client = Edgen()

completion = client.chat.completions.create(
    messages=[
        {
            "role": "user",
            "content": "Can you generate an example json object describing a fruit?",
        }
    ],
    model="ignore",
    response_format={"type": "json_object"},
)

Handling errors

When the library is unable to connect to the API (for example, due to network connection problems or a timeout), a subclass of edgen.APIConnectionError is raised.

When the API returns a non-success status code (that is, 4xx or 5xx response), a subclass of edgen.APIStatusError is raised, containing status_code and response properties.

All errors inherit from edgen.APIError.

import edgen
from edgen import Edgen

client = Edgen()

try:
    chat_completion = await client.chat.completions.create(
        messages=[
            {
                "role": "user",
                "content": "Say this is a test",
            }
        ],
        model="ignore",
    )
except edgen.APIConnectionError as e:
    print("The server could not be reached")
    print(e.__cause__)  # an underlying Exception, likely raised within httpx.
except edgen.RateLimitError as e:
    print("A 429 status code was received; we should back off a bit.")
except edgen.APIStatusError as e:
    print("Another non-200-range status code was received")
    print(e.status_code)
    print(e.response)

Error codes are as followed:

Status Code	Error Type
400	BadRequestError
401	AuthenticationError
403	PermissionDeniedError
404	NotFoundError
422	UnprocessableEntityError
429	RateLimitError
>=500	InternalServerError
N/A	APIConnectionError

Retries

Certain errors are automatically retried 2 times by default, with a short exponential backoff. Connection errors (for example, due to a network connectivity problem), 408 Request Timeout, 409 Conflict, 429 Rate Limit, and >=500 Internal errors are all retried by default.

You can use the max_retries option to configure or disable retry settings:

from edgen import Edgen

# Configure the default for all requests:
client = Edgen(
    # default is 2
    max_retries=0,
)

# Or, configure per-request:
client.with_options(max_retries=5).chat.completions.create(
    messages=[
        {
            "role": "user",
            "content": "How can I get the name of the current day in Node.js?",
        }
    ],
    model="ignore",
)

Timeouts

By default requests time out after 10 minutes. You can configure this with a timeout option, which accepts a float or an httpx.Timeout object:

from edgen import Edgen

# Configure the default for all requests:
client = Edgen(
    # 20 seconds (default is 10 minutes)
    timeout=20.0,
)

# More granular control:
client = Edgen(
    timeout=httpx.Timeout(60.0, read=5.0, write=10.0, connect=2.0),
)

# Override per-request:
client.with_options(timeout=5 * 1000).chat.completions.create(
    messages=[
        {
            "role": "user",
            "content": "How can I list all files in a directory using Python?",
        }
    ],
    model="gpt-3.5-turbo",
)

On timeout, an APITimeoutError is thrown.

Note that requests that time out are retried twice by default.

Advanced

Logging

We use the standard library logging module.

You can enable logging by setting the environment variable EDGEN_LOG to debug.

$ export EDGEN_LOG=debug

How to tell whether None means null or missing

In an API response, a field may be explicitly null, or missing entirely; in either case, its value is None in this library. You can differentiate the two cases with .model_fields_set:

if response.my_field is None:
  if 'my_field' not in response.model_fields_set:
    print('Got json like {}, without a "my_field" key present at all.')
  else:
    print('Got json like {"my_field": null}.')

Accessing raw response data (e.g. headers)

The "raw" Response object can be accessed by prefixing .with_raw_response. to any HTTP method call.

from edgen import Edgen

client = Edgen()
response = client.chat.completions.with_raw_response.create(
    messages=[{
        "role": "user",
        "content": "Say this is a test",
    }],
    model="ignore",
)
print(response.headers.get('X-My-Header'))

completion = response.parse()  # get the object that `chat.completions.create()` would have returned
print(completion)

These methods return an APIResponse object.

Configuring the HTTP client

You can directly override the httpx client to customize it for your use case, including:

• Support for proxies
• Custom transports
• Additional advanced functionality

import httpx
from edgen import Edgen

client = Edgen(
    # Or use the `EDGEN_BASE_URL` env var
    base_url="http://my.test.server.example.com:8083",
    http_client=httpx.Client(
        proxies="http://my.test.proxy.example.com",
        transport=httpx.HTTPTransport(local_address="0.0.0.0"),
    ),
)

Versioning

This package generally follows SemVer conventions.

Requirements

Python 3.7 or higher.

Tests

The tests are based on pytest with the pytest-asyncio, anyio, Faker and respx plugins.