rboto-polly

rboto is an independent project maintained by Ferrumio. It is not affiliated with, sponsored by, or endorsed by Amazon Web Services (AWS).

Preview (Alpha). rboto is under active development. APIs may change between releases.

rboto provides an async-only, typed Python client for Amazon Polly, powered by Rust. This package contains PollyClient and 10 operations.

Installation

Requires Python 3.12 or newer and a native wheel for your Python version and platform.

python -m pip install "rboto[polly]"

You can also install rboto-polly directly; it installs the matching rboto package. Only the selected service is installed.

These are the package names to use when a release is available on your package index. If your index has no release yet, follow the source installation instructions.

Usage

Configure credentials through your environment, shared profile, or workload role. The example uses us-east-1; select a region where your service and resources are available. Resource names, identifiers, input files, and model IDs in the example are placeholders to replace with your own.

import asyncio
from pathlib import Path

from rboto import PollyClient


async def main() -> None:
    client = PollyClient(region="us-east-1")
    response = await client.synthesize_speech(
        text="Hello from rboto", output_format="mp3", voice_id="Joanna",
    )
    audio = await response.audio_stream.read()
    await asyncio.to_thread(Path("speech.mp3").write_bytes, audio)


if __name__ == "__main__":
    asyncio.run(main())

In an application with an event loop, call await main() instead of asyncio.run(main()). Reuse the client across calls. Constructing a client does not send a request.

API conventions

• Import the client with from rboto import PollyClient.

• Every operation is asynchronous: use await client.method(...).

• Operation arguments are keyword-only and use the Python names listed below.

• Structured inputs use typed dictionaries and tagged unions from rboto_polly.types.

• Regular responses expose typed attributes; response.to_dict() converts them to a dictionary.

• Event-stream responses may be typed dictionaries containing async iterators. Follow the declared return type; consume event streams with async for.

• Byte streams are consumed asynchronously. await stream.read() buffers the complete body; iterate the stream when processing a large response.

• Direct operation calls return one page.

• Use async for page in client.paginators.method(...) for supported paginated operations. Paginators accept the same typed arguments as the corresponding client method.

• Catch modeled exceptions from rboto_polly.exceptions. Their error_code, message, and operation_name identify service failures.

Clients also accept profile, endpoint_url, or shared Session settings. See configuration, errors, and streaming.

Operations

This is the complete operation catalog for this generated package. “Required arguments” lists arguments without defaults in the Python signature. Service-side conditions may require additional arguments. Each method links to its complete signature, including optional arguments. Nested input definitions are in rboto_polly.types; native response definitions are in the package's _native.pyi.

Complete signatures

delete_lexicon

async def delete_lexicon(
    *,
    name: str,
) -> DeleteLexiconOutput: ...

describe_voices

async def describe_voices(
    *,
    engine: Engine | None = None,
    language_code: LanguageCode | None = None,
    include_additional_language_codes: bool | None = None,
    next_token: str | None = None,
) -> DescribeVoicesOutput: ...

Also available as client.paginators.describe_voices(...), returning an async iterator of the response type above.

get_lexicon

async def get_lexicon(
    *,
    name: str,
) -> GetLexiconOutput: ...

get_speech_synthesis_task

async def get_speech_synthesis_task(
    *,
    task_id: str,
) -> GetSpeechSynthesisTaskOutput: ...

list_lexicons

async def list_lexicons(
    *,
    next_token: str | None = None,
) -> ListLexiconsOutput: ...

Also available as client.paginators.list_lexicons(...), returning an async iterator of the response type above.

list_speech_synthesis_tasks

async def list_speech_synthesis_tasks(
    *,
    max_results: int | None = None,
    next_token: str | None = None,
    status: TaskStatus | None = None,
) -> ListSpeechSynthesisTasksOutput: ...

Also available as client.paginators.list_speech_synthesis_tasks(...), returning an async iterator of the response type above.

put_lexicon

async def put_lexicon(
    *,
    name: str,
    content: str,
) -> PutLexiconOutput: ...

start_speech_synthesis_stream

async def start_speech_synthesis_stream(
    *,
    engine: Engine,
    output_format: OutputFormat,
    voice_id: VoiceId,
    language_code: LanguageCode | None = None,
    lexicon_names: Sequence[str] | None = None,
    sample_rate: str | None = None,
    action_stream: AsyncIterator[StartSpeechSynthesisStreamActionStream] | None = None,
) -> StartSpeechSynthesisStreamOutput: ...

start_speech_synthesis_task

async def start_speech_synthesis_task(
    *,
    output_format: OutputFormat,
    output_s3_bucket_name: str,
    text: str,
    voice_id: VoiceId,
    engine: Engine | None = None,
    language_code: LanguageCode | None = None,
    lexicon_names: Sequence[str] | None = None,
    output_s3_key_prefix: str | None = None,
    sample_rate: str | None = None,
    sns_topic_arn: str | None = None,
    speech_mark_types: Sequence[SpeechMarkType] | None = None,
    text_type: TextType | None = None,
) -> StartSpeechSynthesisTaskOutput: ...

synthesize_speech

async def synthesize_speech(
    *,
    output_format: OutputFormat,
    text: str,
    voice_id: VoiceId,
    engine: Engine | None = None,
    language_code: LanguageCode | None = None,
    lexicon_names: Sequence[str] | None = None,
    sample_rate: str | None = None,
    speech_mark_types: Sequence[SpeechMarkType] | None = None,
    text_type: TextType | None = None,
) -> SynthesizeSpeechOutput: ...

Links

• Service guide
• Repository
• Issues
• Releases

Licensed under Apache-2.0.