Files
codex/sdk/python/README.md
Ahmed Ibrahim e7bffc5a20 [codex] Accept string input for Python turns (#23162)
## Summary
- Allow thread.turn and turn.steer, including async variants, to accept
RunInput so plain strings work alongside typed input objects.
- Export RunInput and update the SDK artifact generator so regenerated
turn methods keep the same signature and normalization.
- Update docs, examples, notebook cells, and tests to use string
shorthand for text-only turns while keeping typed inputs for multimodal
input.

## Validation
- uv run --extra dev ruff format .
- uv run --extra dev ruff check --output-format=github .
- python3 -m py_compile sdk/python/src/openai_codex/__init__.py
sdk/python/src/openai_codex/api.py
sdk/python/src/openai_codex/_inputs.py
sdk/python/scripts/update_sdk_artifacts.py
sdk/python/tests/test_public_api_signatures.py
sdk/python/tests/test_app_server_streaming.py
sdk/python/tests/test_app_server_turn_controls.py
sdk/python/tests/test_real_app_server_integration.py
- python3 -c "import json;
json.load(open('sdk/python/notebooks/sdk_walkthrough.ipynb'))"
- sdk/python/.venv/bin/python -c "import inspect, openai_codex; from
openai_codex import Thread, AsyncThread, TurnHandle, AsyncTurnHandle,
RunInput; funcs=[Thread.run, Thread.turn, AsyncThread.run,
AsyncThread.turn, TurnHandle.steer, AsyncTurnHandle.steer]; assert
all(inspect.signature(fn).parameters['input'].annotation == 'RunInput'
for fn in funcs); assert RunInput is openai_codex.RunInput"
2026-05-17 09:05:44 -07:00

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# OpenAI Codex Python SDK (Experimental)
Experimental Python SDK for `codex app-server` JSON-RPC v2 over stdio, with a small default surface optimized for real scripts and apps.
The generated wire-model layer is sourced from the pinned `openai-codex-cli-bin`
runtime package and exposed as Pydantic models with snake_case Python fields
that serialize back to the app-servers camelCase wire format.
The package root exports the ergonomic client API; public app-server value and
event types live in `openai_codex.types`.
## Install
```bash
cd sdk/python
uv sync
source .venv/bin/activate
```
Published SDK builds pin an exact `openai-codex-cli-bin` runtime dependency
with the same version as the SDK. Pass `AppServerConfig(codex_bin=...)` only
when you intentionally want to run against a specific local app-server binary.
## Quickstart
```python
from openai_codex import Codex
with Codex() as codex:
# Call login_api_key(...) first when this app-server session is not
# already authenticated.
thread = codex.thread_start(model="gpt-5")
result = thread.run("Say hello in one sentence.")
print(result.final_response)
print(len(result.items))
```
`thread.run(...)` and `thread.turn(...).run()` return `TurnResult`. Its
`final_response` is `None` when the turn completes without a final-answer or
phase-less assistant message item.
## Login
Use the auth helper that matches your app:
```python
from openai_codex import Codex
with Codex() as codex:
codex.login_api_key("sk-...")
account = codex.account()
print(account.account)
```
Interactive ChatGPT login returns a handle. Open the provided URL or device-code
page, then wait for the matching completion event:
```python
with Codex() as codex:
login = codex.login_chatgpt()
print(login.auth_url)
completed = login.wait()
print(completed.success)
```
Use `login_chatgpt_device_code()` for device-code auth, `handle.cancel()` to
stop an in-progress interactive login, and `logout()` to clear the active
app-server account session.
## Docs map
- Golden path tutorial: `docs/getting-started.md`
- API reference (signatures + behavior): `docs/api-reference.md`
- Common decisions and pitfalls: `docs/faq.md`
- Runnable examples index: `examples/README.md`
- Jupyter walkthrough notebook: `notebooks/sdk_walkthrough.ipynb`
## Examples
Start here:
```bash
cd sdk/python
python examples/01_quickstart_constructor/sync.py
python examples/01_quickstart_constructor/async.py
```
## Runtime
Published SDK builds are pinned to an exact `openai-codex-cli-bin` package
version, and that runtime package carries the platform-specific binary for the
target wheel. The SDK package version and runtime package version must match.
## Compatibility and versioning
- Package: `openai-codex`
- Runtime package: `openai-codex-cli-bin`
- Python: `>=3.10`
- Target protocol: Codex `app-server` JSON-RPC v2
- Versioning rule: the SDK package version is the underlying Codex runtime version
## Notes
- `Codex()` is eager and performs startup + `initialize` in the constructor.
- Use context managers (`with Codex() as codex:`) to ensure shutdown.
- Plain strings are accepted anywhere a turn input is accepted; they are
shorthand for `TextInput(...)`.
- Prefer `thread.run("...")` for the common case. Use `thread.turn(...)` when
you need streaming, steering, or interrupt control.
- For transient overload, use `retry_on_overload` from the package root.