Merge pull request #31 from rany2/simplify

Simplify edge_tts library usage

.github/workflows/lint.yml

@@ -0,0 +1,26 @@
+name: Lint
+
+on:
+  push:
+    paths:
+      - '*.py'
+
+jobs:
+  mypy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.7.4
+          architecture: x64
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Install mypy
+        run: pip install mypy
+      - name: Run mypy
+        uses: sasanquaneuf/mypy-github-action@releases/v1
+        with:
+          checkName: 'mypy'   # NOTE: this needs to be the same as the job name
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

examples/basic_generation.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+"""
+Basic example of edge_tts usage.
+"""
+
+import asyncio
+
+import edge_tts
+
+
+async def main() -> None:
+    TEXT = "Hello World!"
+    VOICE = "en-GB-SoniaNeural"
+    OUTPUT_FILE = "test.mp3"
+
+    communicate = edge_tts.Communicate(TEXT, VOICE)
+    await communicate.save(OUTPUT_FILE)
+
+
+if __name__ == "__main__":
+    asyncio.get_event_loop().run_until_complete(main())

examples/dynamic_voice_selection.py

@@ -1,12 +1,17 @@
+#!/usr/bin/env python3
+
+"""
+Example of dynamic voice selection using VoicesManager.
+"""
+
 import asyncio
-import edge_tts
-from edge_tts import VoicesManager
 import random
 
-async def main():
+import edge_tts
-    """
+from edge_tts import VoicesManager
-    Main function
+
-    """
+
+async def main() -> None:
     voices = await VoicesManager.create()
     voice = voices.find(Gender="Male", Language="es")
     # Also supports Locales
@@ -15,12 +20,9 @@ async def main():
     TEXT = "Hoy es un buen día."
     OUTPUT_FILE = "spanish.mp3"
 
-    communicate = edge_tts.Communicate()
+    communicate = edge_tts.Communicate(TEXT, VOICE)
+    await communicate.save(OUTPUT_FILE)
 
-    with open(OUTPUT_FILE, "wb") as f:
-        async for i in communicate.run(TEXT, voice=VOICE):
-            if i[2] is not None:
-                f.write(i[2])
 
 if __name__ == "__main__":
     asyncio.get_event_loop().run_until_complete(main())

examples/example.py

@@ -1,24 +0,0 @@
-#!/usr/bin/env python3
-"""
-Example Python script that shows how to use edge-tts as a module
-"""
-
-import asyncio
-import edge_tts
-
-async def main():
-    """
-    Main function
-    """
-    TEXT = "Hello World!"
-    VOICE = "en-GB-SoniaNeural"
-    OUTPUT_FILE = "test.mp3"
-
-    communicate = edge_tts.Communicate()
-    with open(OUTPUT_FILE, "wb") as f:
-        async for i in communicate.run(TEXT, voice=VOICE):
-            if i[2] is not None:
-                f.write(i[2])
-
-if __name__ == "__main__":
-    asyncio.get_event_loop().run_until_complete(main())

lint.sh

@@ -1,3 +1,4 @@
 find src examples -name '*.py' | xargs black
 find src examples -name '*.py' | xargs isort
 find src examples -name '*.py' | xargs pylint
+find src examples -name '*.py' | xargs mypy

mypy.ini

@@ -0,0 +1,29 @@
+[mypy]
+disallow_any_unimported = True
+disallow_any_expr = False
+disallow_any_decorated = True
+disallow_any_explicit = False
+disallow_any_generics = True
+disallow_subclassing_any = True
+
+disallow_untyped_calls = True
+disallow_untyped_defs = True
+disallow_incomplete_defs = True
+check_untyped_defs = True
+disallow_untyped_decorators = True
+
+implicit_optional = False
+strict_optional = True
+
+warn_redundant_casts = True
+warn_unused_ignores = True
+warn_no_return = True
+warn_return_any = True
+warn_unreachable = True
+
+strict_concatenate = True
+strict_equality = True
+strict = True
+
+[mypy-edge_tts.list_voices]
+disallow_any_decorated = False

setup.cfg

@@ -27,4 +27,11 @@ where=src
 [options.entry_points]
 console_scripts =
     edge-tts = edge_tts.__main__:main
-    edge-playback = edge_playback.__init__:main
+    edge-playback = edge_playback.__main__:main
+
+[options.extras_require]
+dev =
+    black
+    isort
+    mypy
+    pylint

src/edge_playback/__init__.py

@@ -1,56 +0,0 @@
-#!/usr/bin/env python3
-
-"""
-Playback TTS with subtitles using edge-tts and mpv.
-"""
-
-import os
-import subprocess
-import sys
-import tempfile
-from shutil import which
-
-
-def main():
-    """
-    Main function.
-    """
-    if which("mpv") and which("edge-tts"):
-        media = tempfile.NamedTemporaryFile(delete=False)
-        subtitle = tempfile.NamedTemporaryFile(delete=False)
-        try:
-            media.close()
-            subtitle.close()
-
-            print()
-            print(f"Media file: {media.name}")
-            print(f"Subtitle file: {subtitle.name}\n")
-            with subprocess.Popen(
-                [
-                    "edge-tts",
-                    "--boundary-type=1",
-                    f"--write-media={media.name}",
-                    f"--write-subtitles={subtitle.name}",
-                ]
-                + sys.argv[1:]
-            ) as process:
-                process.communicate()
-
-            with subprocess.Popen(
-                [
-                    "mpv",
-                    "--keep-open=yes",
-                    f"--sub-file={subtitle.name}",
-                    media.name,
-                ]
-            ) as process:
-                process.communicate()
-        finally:
-            os.unlink(media.name)
-            os.unlink(subtitle.name)
-    else:
-        print("This script requires mpv and edge-tts.")
-
-
-if __name__ == "__main__":
-    main()

src/edge_playback/__main__.py

@@ -1,10 +1,63 @@
 #!/usr/bin/env python3
 
 """
-This is the main file for the edge_playback package.
+Playback TTS with subtitles using edge-tts and mpv.
 """
 
-from edge_playback.__init__ import main
+import os
+import subprocess
+import sys
+import tempfile
+from shutil import which
+
+
+def main() -> None:
+    depcheck_failed = False
+    if not which("mpv"):
+        print("mpv is not installed.", file=sys.stderr)
+        depcheck_failed = True
+    if not which("edge-tts"):
+        print("edge-tts is not installed.", file=sys.stderr)
+        depcheck_failed = True
+    if depcheck_failed:
+        print("Please install the missing dependencies.", file=sys.stderr)
+        sys.exit(1)
+
+    media = None
+    subtitle = None
+    try:
+        media = tempfile.NamedTemporaryFile(delete=False)
+        media.close()
+
+        subtitle = tempfile.NamedTemporaryFile(delete=False)
+        subtitle.close()
+
+        print(f"Media file: {media.name}")
+        print(f"Subtitle file: {subtitle.name}\n")
+        with subprocess.Popen(
+            [
+                "edge-tts",
+                f"--write-media={media.name}",
+                f"--write-subtitles={subtitle.name}",
+            ]
+            + sys.argv[1:]
+        ) as process:
+            process.communicate()
+
+        with subprocess.Popen(
+            [
+                "mpv",
+                f"--sub-file={subtitle.name}",
+                media.name,
+            ]
+        ) as process:
+            process.communicate()
+    finally:
+        if media is not None:
+            os.unlink(media.name)
+        if subtitle is not None:
+            os.unlink(subtitle.name)
+
 
 if __name__ == "__main__":
     main()

src/edge_tts/__init__.py

@@ -3,5 +3,7 @@ __init__ for edge_tts
 """
 
 from .communicate import Communicate
-from .list_voices import list_voices, VoicesManager
+from .list_voices import VoicesManager, list_voices
 from .submaker import SubMaker
+
+__all__ = ["Communicate", "VoicesManager", "list_voices", "SubMaker"]

src/edge_tts/communicate.py

@@ -4,16 +4,21 @@ Communicate package.
 
 
 import json
+import re
 import time
 import uuid
+from typing import Any, AsyncGenerator, Dict, Generator, List, Optional
 from xml.sax.saxutils import escape
 
 import aiohttp
 
+from edge_tts.exceptions import (NoAudioReceived, UnexpectedResponse,
+                                 UnknownResponse)
+
 from .constants import WSS_URL
 
 
-def get_headers_and_data(data):
+def get_headers_and_data(data: str | bytes) -> tuple[Dict[str, str], bytes]:
     """
     Returns the headers and data from the given data.
 
@@ -25,6 +30,8 @@ def get_headers_and_data(data):
     """
     if isinstance(data, str):
         data = data.encode("utf-8")
+    if not isinstance(data, bytes):
+        raise TypeError("data must be str or bytes")
 
     headers = {}
     for line in data.split(b"\r\n\r\n")[0].split(b"\r\n"):
@@ -37,7 +44,7 @@ def get_headers_and_data(data):
     return headers, b"\r\n\r\n".join(data.split(b"\r\n\r\n")[1:])
 
 
-def remove_incompatible_characters(string):
+def remove_incompatible_characters(string: str | bytes) -> str:
     """
     The service does not support a couple character ranges.
     Most important being the vertical tab character which is
@@ -52,31 +59,30 @@ def remove_incompatible_characters(string):
     """
     if isinstance(string, bytes):
         string = string.decode("utf-8")
+    if not isinstance(string, str):
+        raise TypeError("string must be str or bytes")
 
-    string = list(string)
+    chars: List[str] = list(string)
 
-    for idx, char in enumerate(string):
+    for idx, char in enumerate(chars):
-        code = ord(char)
+        code: int = ord(char)
         if (0 <= code <= 8) or (11 <= code <= 12) or (14 <= code <= 31):
-            string[idx] = " "
+            chars[idx] = " "
 
-    return "".join(string)
+    return "".join(chars)
 
 
-def connect_id():
+def connect_id() -> str:
     """
     Returns a UUID without dashes.
 
-    Args:
-        None
-
     Returns:
         str: A UUID without dashes.
     """
     return str(uuid.uuid4()).replace("-", "")
 
 
-def iter_bytes(my_bytes):
+def iter_bytes(my_bytes: bytes) -> Generator[bytes, None, None]:
     """
     Iterates over bytes object
 
@@ -90,20 +96,22 @@ def iter_bytes(my_bytes):
         yield my_bytes[i : i + 1]
 
 
-def split_text_by_byte_length(text, byte_length):
+def split_text_by_byte_length(text: str | bytes, byte_length: int) -> List[bytes]:
     """
     Splits a string into a list of strings of a given byte length
     while attempting to keep words together.
 
     Args:
-        text (byte): The string to be split.
+        text (str or bytes): The string to be split.
-        byte_length (int): The byte length of each string in the list.
+        byte_length (int): The maximum byte length of each string in the list.
 
     Returns:
-        list: A list of strings of the given byte length.
+        list: A list of bytes of the given byte length.
     """
     if isinstance(text, str):
         text = text.encode("utf-8")
+    if not isinstance(text, bytes):
+        raise TypeError("text must be str or bytes")
 
     words = []
     while len(text) > byte_length:
@@ -125,17 +133,10 @@ def split_text_by_byte_length(text, byte_length):
     return words
 
 
-def mkssml(text, voice, pitch, rate, volume):
+def mkssml(text: str | bytes, voice: str, pitch: str, rate: str, volume: str) -> str:
     """
     Creates a SSML string from the given parameters.
 
-    Args:
-        text (str): The text to be spoken.
-        voice (str): The voice to be used.
-        pitch (str): The pitch to be used.
-        rate (str): The rate to be used.
-        volume (str): The volume to be used.
-
     Returns:
         str: The SSML string.
     """
@@ -150,13 +151,10 @@ def mkssml(text, voice, pitch, rate, volume):
     return ssml
 
 
-def date_to_string():
+def date_to_string() -> str:
     """
     Return Javascript-style date string.
 
-    Args:
-        None
-
     Returns:
         str: Javascript-style date string.
     """
@@ -171,15 +169,10 @@ def date_to_string():
     )
 
 
-def ssml_headers_plus_data(request_id, timestamp, ssml):
+def ssml_headers_plus_data(request_id: str, timestamp: str, ssml: str) -> str:
     """
     Returns the headers and data to be used in the request.
 
-    Args:
-        request_id (str): The request ID.
-        timestamp (str): The timestamp.
-        ssml (str): The SSML string.
-
     Returns:
         str: The headers and data to be used in the request.
     """
@@ -198,73 +191,85 @@ class Communicate:
     Class for communicating with the service.
     """
 
-    def __init__(self):
+    def __init__(
-        """
-        Initializes the Communicate class.
-        """
-        self.date = date_to_string()
-
-    async def run(
         self,
-        messages,
+        text: str,
-        boundary_type=0,
+        voice: str = "Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)",
-        codec="audio-24khz-48kbitrate-mono-mp3",
+        *,
-        voice="Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)",
+        pitch: str = "+0Hz",
-        pitch="+0Hz",
+        rate: str = "+0%",
-        rate="+0%",
+        volume: str = "+0%",
-        volume="+0%",
+        proxy: Optional[str] = None,
-        proxy=None,
     ):
         """
-        Runs the Communicate class.
+        Initializes the Communicate class.
 
-        Args:
+        Raises:
-            messages (str or list): A list of SSML strings or a single text.
+            ValueError: If the voice is not valid.
-            boundery_type (int): The type of boundary to use. 0 for none, 1 for word_boundary, 2 for sentence_boundary.
-            codec (str): The codec to use.
-            voice (str): The voice to use.
-            pitch (str): The pitch to use.
-            rate (str): The rate to use.
-            volume (str): The volume to use.
-
-        Yields:
-            tuple: The subtitle offset, subtitle, and audio data.
         """
-
+        self.text: str = text
-        word_boundary = False
+        self.codec: str = "audio-24khz-48kbitrate-mono-mp3"
-
+        self.voice: str = voice
-        if boundary_type > 0:
+        # Possible values for voice are:
-            word_boundary = True
+        # - Microsoft Server Speech Text to Speech Voice (cy-GB, NiaNeural)
-        if boundary_type > 1:
+        # - cy-GB-NiaNeural
-            raise ValueError(
+        # Always send the first variant as that is what Microsoft Edge does.
-                "Invalid boundary type. SentenceBoundary is no longer supported."
+        match = re.match(r"^([a-z]{2})-([A-Z]{2})-(.+Neural)$", voice)
+        if match is not None:
+            self.voice = (
+                "Microsoft Server Speech Text to Speech Voice"
+                + f" ({match.group(1)}-{match.group(2)}, {match.group(3)})"
             )
 
-        word_boundary = str(word_boundary).lower()
+        if (
+            re.match(
+                r"^Microsoft Server Speech Text to Speech Voice \(.+,.+\)$",
+                self.voice,
+            )
+            is None
+        ):
+            raise ValueError(f"Invalid voice '{voice}'.")
 
-        websocket_max_size = 2 ** 16
+        if re.match(r"^[+-]\d+Hz$", pitch) is None:
+            raise ValueError(f"Invalid pitch '{pitch}'.")
+        self.pitch: str = pitch
+
+        if re.match(r"^[+-]0*([0-9]|([1-9][0-9])|100)%$", rate) is None:
+            raise ValueError(f"Invalid rate '{rate}'.")
+        self.rate: str = rate
+
+        if re.match(r"^[+-]0*([0-9]|([1-9][0-9])|100)%$", volume) is None:
+            raise ValueError(f"Invalid volume '{volume}'.")
+        self.volume: str = volume
+
+        self.proxy: Optional[str] = proxy
+
+    async def stream(self) -> AsyncGenerator[Dict[str, Any], None]:
+        """Streams audio and metadata from the service."""
+
+        websocket_max_size = 2**16
         overhead_per_message = (
             len(
                 ssml_headers_plus_data(
-                    connect_id(), self.date, mkssml("", voice, pitch, rate, volume)
+                    connect_id(),
+                    date_to_string(),
+                    mkssml("", self.voice, self.pitch, self.rate, self.volume),
                 )
             )
-            + 50
+            + 50  # margin of error
-        )  # margin of error
+        )
-        messages = split_text_by_byte_length(
+        texts = split_text_by_byte_length(
-            escape(remove_incompatible_characters(messages)),
+            escape(remove_incompatible_characters(self.text)),
             websocket_max_size - overhead_per_message,
         )
 
-        # Variables for the loop
-        download = False
         async with aiohttp.ClientSession(trust_env=True) as session:
             async with session.ws_connect(
                 f"{WSS_URL}&ConnectionId={connect_id()}",
                 compress=15,
                 autoclose=True,
                 autoping=True,
-                proxy=proxy,
+                proxy=self.proxy,
                 headers={
                     "Pragma": "no-cache",
                     "Cache-Control": "no-cache",
@@ -275,9 +280,19 @@ class Communicate:
                     " (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36 Edg/91.0.864.41",
                 },
             ) as websocket:
-                for message in messages:
+                for text in texts:
+                    # download indicates whether we should be expecting audio data,
+                    # this is so what we avoid getting binary data from the websocket
+                    # and falsely thinking it's audio data.
+                    download_audio = False
+
+                    # audio_was_received indicates whether we have received audio data
+                    # from the websocket. This is so we can raise an exception if we
+                    # don't receive any audio data.
+                    audio_was_received = False
+
                     # Each message needs to have the proper date
-                    self.date = date_to_string()
+                    date = date_to_string()
 
                     # Prepare the request to be sent to the service.
                     #
@@ -290,26 +305,26 @@ class Communicate:
                     #
                     # Also pay close attention to double { } in request (escape for f-string).
                     request = (
-                        f"X-Timestamp:{self.date}\r\n"
+                        f"X-Timestamp:{date}\r\n"
                         "Content-Type:application/json; charset=utf-8\r\n"
                         "Path:speech.config\r\n\r\n"
                         '{"context":{"synthesis":{"audio":{"metadataoptions":{'
-                        f'"sentenceBoundaryEnabled":false,'
+                        '"sentenceBoundaryEnabled":false,"wordBoundaryEnabled":true},'
-                        f'"wordBoundaryEnabled":{word_boundary}}},"outputFormat":"{codec}"'
+                        f'"outputFormat":"{self.codec}"'
                         "}}}}\r\n"
                     )
-                    # Send the request to the service.
                     await websocket.send_str(request)
-                    # Send the message itself.
+
                     await websocket.send_str(
                         ssml_headers_plus_data(
                             connect_id(),
-                            self.date,
+                            date,
-                            mkssml(message, voice, pitch, rate, volume),
+                            mkssml(
+                                text, self.voice, self.pitch, self.rate, self.volume
+                            ),
                         )
                     )
 
-                    # Begin listening for the response.
                     async for received in websocket:
                         if received.type == aiohttp.WSMsgType.TEXT:
                             parameters, data = get_headers_and_data(received.data)
@@ -317,76 +332,101 @@ class Communicate:
                                 "Path" in parameters
                                 and parameters["Path"] == "turn.start"
                             ):
-                                download = True
+                                download_audio = True
                             elif (
                                 "Path" in parameters
                                 and parameters["Path"] == "turn.end"
                             ):
-                                download = False
+                                download_audio = False
                                 break
                             elif (
                                 "Path" in parameters
                                 and parameters["Path"] == "audio.metadata"
                             ):
                                 metadata = json.loads(data)
-                                metadata_type = metadata["Metadata"][0]["Type"]
+                                for i in range(len(metadata["Metadata"])):
-                                metadata_offset = metadata["Metadata"][0]["Data"][
+                                    metadata_type = metadata["Metadata"][i]["Type"]
+                                    metadata_offset = metadata["Metadata"][i]["Data"][
                                         "Offset"
                                     ]
                                     if metadata_type == "WordBoundary":
-                                    metadata_duration = metadata["Metadata"][0]["Data"][
+                                        metadata_duration = metadata["Metadata"][i][
-                                        "Duration"
+                                            "Data"
-                                    ]
+                                        ]["Duration"]
-                                    metadata_text = metadata["Metadata"][0]["Data"][
+                                        metadata_text = metadata["Metadata"][i]["Data"][
                                             "text"
                                         ]["Text"]
-                                    yield (
+                                        yield {
-                                        [
+                                            "type": metadata_type,
-                                            metadata_offset,
+                                            "offset": metadata_offset,
-                                            metadata_duration,
+                                            "duration": metadata_duration,
-                                        ],
+                                            "text": metadata_text,
-                                        metadata_text,
+                                        }
-                                        None,
-                                    )
                                     elif metadata_type == "SentenceBoundary":
-                                    raise NotImplementedError(
+                                        raise UnknownResponse(
                                             "SentenceBoundary is not supported due to being broken."
                                         )
                                     elif metadata_type == "SessionEnd":
                                         continue
                                     else:
-                                    raise NotImplementedError(
+                                        raise UnknownResponse(
                                             f"Unknown metadata type: {metadata_type}"
                                         )
                             elif (
                                 "Path" in parameters
                                 and parameters["Path"] == "response"
                             ):
-                                # TODO: implement this:
-                                """
-                                X-RequestId:xxxxxxxxxxxxxxxxxxxxxxxxx
-                                Content-Type:application/json; charset=utf-8
-                                Path:response
-
-                                {"context":{"serviceTag":"yyyyyyyyyyyyyyyyyyy"},"audio":{"type":"inline","streamId":"zzzzzzzzzzzzzzzzz"}}
-                                """
                                 pass
                             else:
-                                raise ValueError(
+                                raise UnknownResponse(
                                     "The response from the service is not recognized.\n"
                                     + received.data
                                 )
                         elif received.type == aiohttp.WSMsgType.BINARY:
-                            if download:
+                            if download_audio:
-                                yield (
+                                yield {
-                                    None,
+                                    "type": "audio",
-                                    None,
+                                    "data": b"Path:audio\r\n".join(
-                                    b"Path:audio\r\n".join(
                                         received.data.split(b"Path:audio\r\n")[1:]
                                     ),
-                                )
+                                }
+                                audio_was_received = True
                             else:
-                                raise ValueError(
+                                raise UnexpectedResponse(
-                                    "The service sent a binary message, but we are not expecting one."
+                                    "We received a binary message, but we are not expecting one."
+                                )
+
+                    if not audio_was_received:
+                        raise NoAudioReceived(
+                            "No audio was received. Please verify that your parameters are correct."
+                        )
+
+    async def save(
+        self, audio_fname: str | bytes, metadata_fname: Optional[str | bytes] = None
+    ) -> None:
+        """
+        Save the audio and metadata to the specified files.
+        """
+        written_audio = False
+        try:
+            audio = open(audio_fname, "wb")
+            metadata = None
+            if metadata_fname is not None:
+                metadata = open(metadata_fname, "w", encoding="utf-8")
+
+            async for message in self.stream():
+                if message["type"] == "audio":
+                    audio.write(message["data"])
+                    written_audio = True
+                elif metadata is not None and message["type"] == "WordBoundary":
+                    json.dump(message, metadata)
+                    metadata.write("\n")
+        finally:
+            audio.close()
+            if metadata is not None:
+                metadata.close()
+
+        if not written_audio:
+            raise NoAudioReceived(
+                "No audio was received from the service, so the file is empty."
             )
-                await websocket.close()

src/edge_tts/exceptions.py

@@ -0,0 +1,16 @@
+"""Exceptions for the Edge TTS project."""
+
+
+class UnknownResponse(Exception):
+    """Raised when an unknown response is received from the server."""
+
+
+class UnexpectedResponse(Exception):
+    """Raised when an unexpected response is received from the server.
+
+    This hasn't happened yet, but it's possible that the server will
+    change its response format in the future."""
+
+
+class NoAudioReceived(Exception):
+    """Raised when no audio is received from the server."""

src/edge_tts/list_voices.py

@@ -1,21 +1,21 @@
 """
-list_voices package.
+list_voices package for edge_tts.
 """
 
 import json
+from typing import Any, Dict, List, Optional
 
 import aiohttp
 
 from .constants import VOICE_LIST
 
 
-async def list_voices(proxy=None):
+async def list_voices(*, proxy: Optional[str] = None) -> Any:
     """
     List all available voices and their attributes.
 
     This pulls data from the URL used by Microsoft Edge to return a list of
-    all available voices. However many more experimental voices are available
+    all available voices.
-    than are listed here. (See https://aka.ms/csspeech/voicenames)
 
     Returns:
         dict: A dictionary of voice attributes.
@@ -47,20 +47,32 @@ class VoicesManager:
     A class to find the correct voice based on their attributes.
     """
 
+    def __init__(self) -> None:
+        self.voices: List[Dict[str, Any]] = []
+        self.called_create: bool = False
+
     @classmethod
-    async def create(cls):
+    async def create(cls: Any) -> "VoicesManager":
+        """
+        Creates a VoicesManager object and populates it with all available voices.
+        """
         self = VoicesManager()
         self.voices = await list_voices()
         self.voices = [
             {**voice, **{"Language": voice["Locale"].split("-")[0]}}
             for voice in self.voices
         ]
+        self.called_create = True
         return self
 
-    def find(self, **kwargs):
+    def find(self, **kwargs: Any) -> List[Dict[str, Any]]:
         """
         Finds all matching voices based on the provided attributes.
         """
+        if not self.called_create:
+            raise RuntimeError(
+                "VoicesManager.find() called before VoicesManager.create()"
+            )
 
         matching_voices = [
             voice for voice in self.voices if kwargs.items() <= voice.items()

src/edge_tts/submaker.py

@@ -6,10 +6,11 @@ information provided by the service easier.
 """
 
 import math
+from typing import List, Tuple
 from xml.sax.saxutils import escape, unescape
 
 
-def formatter(offset1, offset2, subdata):
+def formatter(offset1: float, offset2: float, subdata: str) -> str:
     """
     formatter returns the timecode and the text of the subtitle.
     """
@@ -19,7 +20,7 @@ def formatter(offset1, offset2, subdata):
     )
 
 
-def mktimestamp(time_unit):
+def mktimestamp(time_unit: float) -> str:
     """
     mktimestamp returns the timecode of the subtitle.
 
@@ -28,9 +29,9 @@ def mktimestamp(time_unit):
     Returns:
         str: The timecode of the subtitle.
     """
-    hour = math.floor(time_unit / 10 ** 7 / 3600)
+    hour = math.floor(time_unit / 10**7 / 3600)
-    minute = math.floor((time_unit / 10 ** 7 / 60) % 60)
+    minute = math.floor((time_unit / 10**7 / 60) % 60)
-    seconds = (time_unit / 10 ** 7) % 60
+    seconds = (time_unit / 10**7) % 60
     return f"{hour:02d}:{minute:02d}:{seconds:06.3f}"
 
 
@@ -39,7 +40,7 @@ class SubMaker:
     SubMaker class
     """
 
-    def __init__(self, overlapping=1):
+    def __init__(self, overlapping: int = 1) -> None:
         """
         SubMaker constructor.
 
@@ -47,10 +48,11 @@ class SubMaker:
             overlapping (int): The amount of time in seconds that the
                                subtitles should overlap.
         """
-        self.subs_and_offset = []
+        self.offset: List[Tuple[float, float]] = []
-        self.overlapping = overlapping * (10 ** 7)
+        self.subs: List[str] = []
+        self.overlapping: int = overlapping * (10**7)
 
-    def create_sub(self, timestamp, text):
+    def create_sub(self, timestamp: Tuple[float, float], text: str) -> None:
         """
         create_sub creates a subtitle with the given timestamp and text
         and adds it to the list of subtitles
@@ -62,40 +64,39 @@ class SubMaker:
         Returns:
             None
         """
-        timestamp[1] += timestamp[0]
+        self.offset.append((timestamp[0], timestamp[0] + timestamp[1]))
-        self.subs_and_offset.append(timestamp)
+        self.subs.append(text)
-        self.subs_and_offset.append(text)
 
-    def generate_subs(self):
+    def generate_subs(self) -> str:
         """
         generate_subs generates the complete subtitle file.
 
         Returns:
             str: The complete subtitle file.
         """
-        if len(self.subs_and_offset) >= 2:
+        if len(self.subs) == len(self.offset):
             data = "WEBVTT\r\n\r\n"
-            for offset, subs in zip(
+            for offset, subs in zip(self.offset, self.subs):
-                self.subs_and_offset[::2], self.subs_and_offset[1::2]
-            ):
                 subs = unescape(subs)
-                subs = [subs[i : i + 79] for i in range(0, len(subs), 79)]
+                split_subs: List[str] = [
+                    subs[i : i + 79] for i in range(0, len(subs), 79)
+                ]
 
-                for i in range(len(subs) - 1):
+                for i in range(len(split_subs) - 1):
-                    sub = subs[i]
+                    sub = split_subs[i]
                     split_at_word = True
                     if sub[-1] == " ":
-                        subs[i] = sub[:-1]
+                        split_subs[i] = sub[:-1]
                         split_at_word = False
 
                     if sub[0] == " ":
-                        subs[i] = sub[1:]
+                        split_subs[i] = sub[1:]
                         split_at_word = False
 
                     if split_at_word:
-                        subs[i] += "-"
+                        split_subs[i] += "-"
 
-                subs = "\r\n".join(subs)
+                subs = "\r\n".join(split_subs)
 
                 data += formatter(offset[0], offset[1] + self.overlapping, subs)
             return data

src/edge_tts/util.py

@@ -6,14 +6,14 @@ Main package.
 import argparse
 import asyncio
 import sys
+from io import BufferedWriter
+from typing import Any
 
 from edge_tts import Communicate, SubMaker, list_voices
 
 
-async def _list_voices(proxy):
+async def _print_voices(*, proxy: str) -> None:
-    """
+    """Print all available voices."""
-    List available voices.
-    """
     for idx, voice in enumerate(await list_voices(proxy=proxy)):
         if idx != 0:
             print()
@@ -25,38 +25,41 @@ async def _list_voices(proxy):
             print(f"{key}: {voice[key]}")
 
 
-async def _tts(args):
+async def _run_tts(args: Any) -> None:
-    tts = Communicate()
+    """Run TTS after parsing arguments from command line."""
-    subs = SubMaker(args.overlapping)
+    tts = Communicate(
-    if args.write_media:
-        media_file = open(args.write_media, "wb")  # pylint: disable=consider-using-with
-    async for i in tts.run(
         args.text,
-        args.boundary_type,
-        args.codec,
         args.voice,
-        args.pitch,
-        args.rate,
-        args.volume,
         proxy=args.proxy,
-    ):
+        rate=args.rate,
-        if i[2] is not None:
+        volume=args.volume,
-            if not args.write_media:
+    )
-                sys.stdout.buffer.write(i[2])
+    try:
-            else:
+        media_file = None
-                media_file.write(i[2])
-        elif i[0] is not None and i[1] is not None:
-            subs.create_sub(i[0], i[1])
         if args.write_media:
-        media_file.close()
+            media_file = open(args.write_media, "wb")
+
+        subs = SubMaker(args.overlapping)
+        async for data in tts.stream():
+            if data["type"] == "audio":
+                if isinstance(media_file, BufferedWriter):
+                    media_file.write(data["data"])
+                else:
+                    sys.stdout.buffer.write(data["data"])
+            elif data["type"] == "WordBoundary":
+                subs.create_sub((data["offset"], data["duration"]), data["text"])
+
         if not args.write_subtitles:
             sys.stderr.write(subs.generate_subs())
         else:
             with open(args.write_subtitles, "w", encoding="utf-8") as file:
                 file.write(subs.generate_subs())
+    finally:
+        if media_file is not None:
+            media_file.close()
 
 
-async def _main():
+async def _async_main() -> None:
     parser = argparse.ArgumentParser(description="Microsoft Edge TTS")
     group = parser.add_mutually_exclusive_group(required=True)
     group.add_argument("-t", "--text", help="what TTS will say")
@@ -64,23 +67,13 @@ async def _main():
     parser.add_argument(
         "-v",
         "--voice",
-        help="voice for TTS. "
+        help="voice for TTS. " "Default: en-US-AriaNeural",
-        "Default: Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)",
+        default="en-US-AriaNeural",
-        default="Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)",
-    )
-    parser.add_argument(
-        "-c",
-        "--codec",
-        help="codec format. Default: audio-24khz-48kbitrate-mono-mp3. "
-        "Another choice is webm-24khz-16bit-mono-opus. "
-        "For more info check https://bit.ly/2T33h6S",
-        default="audio-24khz-48kbitrate-mono-mp3",
     )
     group.add_argument(
         "-l",
         "--list-voices",
-        help="lists available voices. "
+        help="lists available voices",
-        "Edge's list is incomplete so check https://bit.ly/2SFq1d3",
         action="store_true",
     )
     parser.add_argument(
@@ -109,32 +102,19 @@ async def _main():
         type=float,
     )
     parser.add_argument(
-        "-b",
+        "--write-media", help="send media output to file instead of stdout"
-        "--boundary-type",
-        help="set boundary type for subtitles. Default 0 for none. Set 1 for word_boundary.",
-        default=0,
-        type=int,
-    )
-    parser.add_argument(
-        "--write-media", help="instead of stdout, send media output to provided file"
     )
     parser.add_argument(
         "--write-subtitles",
-        help="instead of stderr, send subtitle output to provided file (implies boundary-type is 1)",
+        help="send subtitle output to provided file instead of stderr",
-    )
-    parser.add_argument(
-        "--proxy",
-        help="proxy",
     )
+    parser.add_argument("--proxy", help="use a proxy for TTS and voice list.")
     args = parser.parse_args()
 
     if args.list_voices:
-        await _list_voices(args.proxy)
+        await _print_voices(proxy=args.proxy)
         sys.exit(0)
 
-    if args.write_subtitles and args.boundary_type == 0:
-        args.boundary_type = 1
-
     if args.text is not None or args.file is not None:
         if args.file is not None:
             # we need to use sys.stdin.read() because some devices
@@ -147,14 +127,12 @@ async def _main():
                 with open(args.file, "r", encoding="utf-8") as file:
                     args.text = file.read()
 
-        await _tts(args)
+        await _run_tts(args)
 
 
-def main():
+def main() -> None:
-    """
+    """Run the main function using asyncio."""
-    Main function.
+    asyncio.get_event_loop().run_until_complete(_async_main())
-    """
-    asyncio.get_event_loop().run_until_complete(_main())
 
 
 if __name__ == "__main__":