Merge pull request #42 from jdepoix/feature/translating-transcripts

Feature/translating transcripts
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README.md
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@ -1,121 +1,232 @@
# YouTube Transcript/Subtitle API (including automatically generated subtitles)
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# YouTube Transcript/Subtitle API (including automatically generated subtitles and subtitle translations)
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This is an python API which allows you to get the transcripts/subtitles for a given YouTube video. It also works for automatically generated subtitles, supports translating subtitles and it does not require a headless browser, like other selenium based solutions do!
## Install
It is recommended to [install this module by using pip](https://pypi.org/project/youtube-transcript-api/):
```
pip install youtube_transcript_api
```
If you want to use it from source, you'll have to install the dependencies manually:
```
pip install -r requirements.txt
```
This is an python API which allows you to get the transcripts/subtitles for a given YouTube video. It also works for automatically generated subtitles and it does not require a headless browser, like other selenium based solutions do!
You can either integrate this module [into an existing application](#api), or just use it via an [CLI](#cli).
## API
The easiest way to get a transcript for a given video is to execute:
```python
from youtube_transcript_api import YouTubeTranscriptApi
YouTubeTranscriptApi.get_transcript(video_id)
```
This will return a list of dictionaries looking somewhat like this:
```python
[
{
'text': 'Hey there',
'start': 7.58,
'duration': 6.13
},
{
'text': 'how are you',
'start': 14.08,
'duration': 7.58
},
# ...
]
```
You can also add the `languages` param if you want to make sure the transcripts are retrieved in your desired language (it defaults to english).
```python
YouTubeTranscriptApi.get_transcripts(video_ids, languages=['de', 'en'])
```
It's a list of language codes in a descending priority. In this example it will first try to fetch the german transcript (`'de'`) and then fetch the english transcript (`'en'`) if it fails to do so. If you want to find out which languages are available first, [have a look at `list_transcripts()`](#list-available-transcripts)
To get transcripts for a list of video ids you can call:
```python
YouTubeTranscriptApi.get_transcripts(video_ids, languages=['de', 'en'])
```
`languages` also is optional here.
## Install
### List available transcripts
It is recommended to [install this module by using pip](https://pypi.org/project/youtube-transcript-api/):
```
pip install youtube_transcript_api
```
If you want to use it from source, you'll have to install the dependencies manually:
```
pip install -r requirements.txt
```
## How to use it
You could either integrate this module into an existing application, or just use it via an CLI
### In code
To get a transcript for a given video you can do:
If you want to list all transcripts which are available for a given video you can call:
```python
from youtube_transcript_api import YouTubeTranscriptApi
YouTubeTranscriptApi.get_transcript(video_id)
transcript_list = YouTubeTranscriptApi.list_transcripts(video_id, languages=['de', 'en'])
```
This will return a list of dictionaries looking somewhat like this:
This will return a `TranscriptList` object which is iterable and provides methods to filter the list of transcripts for specific languages and types, like:
```python
[
{
'text': 'Hey there',
'start': 7.58,
'duration': 6.13
},
{
'text': 'how are you',
'start': 14.08,
'duration': 7.58
},
# ...
]
transcript = transcript_list.find_transcript(['de', 'en'])
```
You can also add the `languages` param if you want to make sure the transcripts are retrieved in your desired language (it defaults to english).
By default this module always picks manually created transcripts over automatically created ones, if a transcript in the requested language is available both manually created and generated. The `TranscriptList` allows you to bypass this default behaviour by searching for specific transcript types:
```python
YouTubeTranscriptApi.get_transcripts(video_ids, languages=['de', 'en'])
# filter for manually created transcripts
transcript = transcript_list.find_manually_created_transcript(['de', 'en'])
# or automatically generated ones
transcript = transcript_list.find_generated_transcript(['de', 'en'])
```
It's a list of language codes in a descending priority. In this example it will first try to fetch the german transcript (`'de'`) and then fetch the english transcript (`'en'`) if it fails to do so. As I can't provide a complete list of all working language codes with full certainty, you may have to play around with the language codes a bit, to find the one which is working for you!
To get transcripts for a list fo video ids you can call:
The methods `find_generated_transcript`, `find_manually_created_transcript`, `find_generated_transcript` return `Transcript` objects. They contain metadata regarding the transcript:
```python
YouTubeTranscriptApi.get_transcripts(video_ids, languages=['de', 'en'])
print(
transcript.video_id,
transcript.language,
transcript.language_code,
# whether it has been manually created or generated by YouTube
transcript.is_generated,
# whether this transcript can be translated or not
transcript.is_translatable,
# a list of languages the transcript can be translated to
transcript.translation_languages,
)
```
`languages` also is optional here.
### CLI
Execute the CLI script using the video ids as parameters and the results will be printed out to the command line:
```
youtube_transcript_api <first_video_id> <second_video_id> ...
```
The CLI also gives you the option to provide a list of preferred languages:
```
youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en
```
If you would prefer to write it into a file or pipe it into another application, you can also output the results as json using the following line:
```
youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --json > transcripts.json
```
### Proxy
You can specify a https/http proxy, which will be used during the requests to YouTube:
and provide the method, which allows you to fetch the actual transcript data:
```python
from youtube_transcript_api import YouTubeTranscriptApi
YouTubeTranscriptApi.get_transcript(video_id, proxies={"http": "http://user:pass@domain:port", "https": "https://user:pass@domain:port"})
transcript.fetch()
```
As the `proxies` dict is passed on to the `requests.get(...)` call, it follows the [format used by the requests library](http://docs.python-requests.org/en/master/user/advanced/#proxies).
### Translate transcript
Using the CLI:
YouTube has a feature which allows you to automatically translate subtitles. This module also makes it possible to access this feature. To do so `Transcript` objects provide a `translate()` method, which returns a new translated `Transcript` object:
```
youtube_transcript_api <first_video_id> <second_video_id> --http-proxy http://user:pass@domain:port --https-proxy https://user:pass@domain:port
```python
transcript = transcript_list.find_transcript(['en'])
translated_transcript = transcript.translate('de')
print(translated_transcript.fetch())
```
### By example
```python
# retrieve the available transcripts
transcript_list = YouTubeTranscriptApi.get('video_id')
# iterate over all available transcripts
for transcript in transcript_list:
## Warning
# the Transcript object provides metadata properties
print(
transcript.video_id,
transcript.language,
transcript.language_code,
# whether it has been manually created or generated by YouTube
transcript.is_generated,
# whether this transcript can be translated or not
transcript.is_translatable,
# a list of languages the transcript can be translated to
transcript.translation_languages,
)
# fetch the actual transcript data
print(transcript.fetch())
# translating the transcript will return another transcript object
print(transcript.translate('en').fetch())
# you can also directly filter for the language you are looking for, using the transcript list
transcript = transcript_list.find_transcript(['de', 'en'])
# or just filter for manually created transcripts
transcript = transcript_list.find_manually_created_transcript(['de', 'en'])
# or automatically generated ones
transcript = transcript_list.find_generated_transcript(['de', 'en'])
```
## CLI
Execute the CLI script using the video ids as parameters and the results will be printed out to the command line:
```
youtube_transcript_api <first_video_id> <second_video_id> ...
```
The CLI also gives you the option to provide a list of preferred languages:
```
youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en
```
This code uses an undocumented part of the YouTube API, which is called by the YouTube web-client. So there is no guarantee that it won't stop working tomorrow, if they change how things work. I will however do my best to make things working again as soon as possible if that happens. So if it stops working, let me know!
You can also specify if you want to exclude automatically generated or manually created subtitles:
## Donation
```
youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --exclude-generated
youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --exclude-manually-created
```
If you would prefer to write it into a file or pipe it into another application, you can also output the results as json using the following line:
```
youtube_transcript_api <first_video_id> <second_video_id> ... --languages de en --json > transcripts.json
```
If this project makes you happy by reducing your development time, you can make me happy by treating me to a cup of coffee :)
Translating transcripts using the CLI is also possible:
[![Donate](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=BAENLEW8VUJ6G&source=url)
```
youtube_transcript_api <first_video_id> <second_video_id> ... --languages en --translate de
```
If you are not sure which languages are available for a given video you can call, to list all available transcripts:
```
youtube_transcript_api --list-transcripts <first_video_id>
```
## Proxy
You can specify a https/http proxy, which will be used during the requests to YouTube:
```python
from youtube_transcript_api import YouTubeTranscriptApi
YouTubeTranscriptApi.get_transcript(video_id, proxies={"http": "http://user:pass@domain:port", "https": "https://user:pass@domain:port"})
```
As the `proxies` dict is passed on to the `requests.get(...)` call, it follows the [format used by the requests library](http://docs.python-requests.org/en/master/user/advanced/#proxies).
Using the CLI:
```
youtube_transcript_api <first_video_id> <second_video_id> --http-proxy http://user:pass@domain:port --https-proxy https://user:pass@domain:port
```
## Warning
This code uses an undocumented part of the YouTube API, which is called by the YouTube web-client. So there is no guarantee that it won't stop working tomorrow, if they change how things work. I will however do my best to make things working again as soon as possible if that happens. So if it stops working, let me know!
## Donation
If this project makes you happy by reducing your development time, you can make me happy by treating me to a cup of coffee :)
[![Donate](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=BAENLEW8VUJ6G&source=url)

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@ -1,3 +1,11 @@
from ._api import YouTubeTranscriptApi
from ._transcripts import TranscriptList, Transcript
from ._errors import TranscriptsDisabled, NoTranscriptFound, CouldNotRetrieveTranscript, VideoUnavailable
from ._errors import (
TranscriptsDisabled,
NoTranscriptFound,
CouldNotRetrieveTranscript,
VideoUnavailable,
NotTranslatable,
TranslationLanguageNotAvailable,
NoTranscriptAvailable,
)

View File

@ -4,17 +4,68 @@ from ._transcripts import TranscriptListFetcher
class YouTubeTranscriptApi():
@classmethod
def list_transcripts(cls, video_id, proxies=None):
"""
Retrieves the list of transcripts which are available for a given video. It returns a `TranscriptList` object
which is iterable and provides methods to filter the list of transcripts for specific languages. While iterating
over the `TranscriptList` the individual transcripts are represented by `Transcript` objects, which provide
metadata and can either be fetched by calling `transcript.fetch()` or translated by calling
`transcript.translate('en')`. Example::
# retrieve the available transcripts
transcript_list = YouTubeTranscriptApi.get('video_id')
# iterate over all available transcripts
for transcript in transcript_list:
# the Transcript object provides metadata properties
print(
transcript.video_id,
transcript.language,
transcript.language_code,
# whether it has been manually created or generated by YouTube
transcript.is_generated,
# a list of languages the transcript can be translated to
transcript.translation_languages,
)
# fetch the actual transcript data
print(transcript.fetch())
# translating the transcript will return another transcript object
print(transcript.translate('en').fetch())
# you can also directly filter for the language you are looking for, using the transcript list
transcript = transcript_list.find_transcript(['de', 'en'])
# or just filter for manually created transcripts
transcript = transcript_list.find_manually_created_transcript(['de', 'en'])
# or automatically generated ones
transcript = transcript_list.find_generated_transcript(['de', 'en'])
:param video_id: the youtube video id
:type video_id: str
:param proxies: a dictionary mapping of http and https proxies to be used for the network requests
:type proxies: {'http': str, 'https': str} - http://docs.python-requests.org/en/master/user/advanced/#proxies
:return: the list of available transcripts
:rtype TranscriptList:
"""
with requests.Session() as http_client:
http_client.proxies = proxies if proxies else {}
return TranscriptListFetcher(http_client).fetch(video_id)
@classmethod
def get_transcripts(cls, video_ids, languages=('en',), continue_after_error=False, proxies=None):
"""
Retrieves the transcripts for a list of videos.
:param video_ids: a list of youtube video ids
:type video_ids: [str]
:type video_ids: list[str]
:param languages: A list of language codes in a descending priority. For example, if this is set to ['de', 'en']
it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if it fails to
do so.
:type languages: [str]
:type languages: list[str]
:param continue_after_error: if this is set the execution won't be stopped, if an error occurs while retrieving
one of the video transcripts
:type continue_after_error: bool
@ -22,7 +73,7 @@ class YouTubeTranscriptApi():
:type proxies: {'http': str, 'https': str} - http://docs.python-requests.org/en/master/user/advanced/#proxies
:return: a tuple containing a dictionary mapping video ids onto their corresponding transcripts, and a list of
video ids, which could not be retrieved
:rtype: ({str: [{'text': str, 'start': float, 'end': float}]}, [str]})
:rtype ({str: [{'text': str, 'start': float, 'end': float}]}, [str]}):
"""
data = {}
unretrievable_videos = []
@ -41,19 +92,19 @@ class YouTubeTranscriptApi():
@classmethod
def get_transcript(cls, video_id, languages=('en',), proxies=None):
"""
Retrieves the transcript for a single video.
Retrieves the transcript for a single video. This is just a shortcut for calling::
YouTubeTranscriptApi.list_transcripts(video_id, proxies).find_transcript(languages).fetch()
:param video_id: the youtube video id
:type video_id: str
:param languages: A list of language codes in a descending priority. For example, if this is set to ['de', 'en']
it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if it fails to
do so.
:type languages: [str]
:type languages: list[str]
:param proxies: a dictionary mapping of http and https proxies to be used for the network requests
:type proxies: {'http': str, 'https': str} - http://docs.python-requests.org/en/master/user/advanced/#proxies
:return: a list of dictionaries containing the 'text', 'start' and 'duration' keys
:rtype: [{'text': str, 'start': float, 'end': float}]
:rtype [{'text': str, 'start': float, 'end': float}]:
"""
with requests.Session() as http_client:
http_client.proxies = proxies if proxies else {}
return TranscriptListFetcher(http_client).fetch(video_id).find_transcript(languages).fetch()
return cls.list_transcripts(video_id, proxies).find_transcript(languages).fetch()

View File

@ -14,22 +14,45 @@ class YouTubeTranscriptCli():
def run(self):
parsed_args = self._parse_args()
if parsed_args.exclude_manually_created and parsed_args.exclude_generated:
return ''
proxies = None
if parsed_args.http_proxy != '' or parsed_args.https_proxy != '':
proxies = {"http": parsed_args.http_proxy, "https": parsed_args.https_proxy}
transcripts, unretrievable_videos = YouTubeTranscriptApi.get_transcripts(
parsed_args.video_ids,
languages=parsed_args.languages,
continue_after_error=True,
proxies=proxies
)
transcripts = []
exceptions = []
for video_id in parsed_args.video_ids:
try:
transcripts.append(self._fetch_transcript(parsed_args, proxies, video_id))
except Exception as exception:
exceptions.append(exception)
return '\n\n'.join(
[str(YouTubeTranscriptApi.CouldNotRetrieveTranscript(video_id)) for video_id in unretrievable_videos]
[str(exception) for exception in exceptions]
+ ([json.dumps(transcripts) if parsed_args.json else pprint.pformat(transcripts)] if transcripts else [])
)
def _fetch_transcript(self, parsed_args, proxies, video_id):
transcript_list = YouTubeTranscriptApi.list_transcripts(video_id, proxies=proxies)
if parsed_args.list_transcripts:
return str(transcript_list)
if parsed_args.exclude_manually_created:
transcript = transcript_list.find_generated_transcript(parsed_args.languages)
elif parsed_args.exclude_generated:
transcript = transcript_list.find_manually_created_transcript(parsed_args.languages)
else:
transcript = transcript_list.find_transcript(parsed_args.languages)
if parsed_args.translate:
transcript = transcript.translate(parsed_args.translate)
return transcript.fetch()
def _parse_args(self):
parser = argparse.ArgumentParser(
description=(
@ -38,6 +61,13 @@ class YouTubeTranscriptCli():
'other selenium based solutions do!'
)
)
parser.add_argument(
'--list-transcripts',
action='store_const',
const=True,
default=False,
help='This will list the languages in which the given videos are available in.',
)
parser.add_argument('video_ids', nargs='+', type=str, help='List of YouTube video IDs.')
parser.add_argument(
'--languages',
@ -46,11 +76,25 @@ class YouTubeTranscriptCli():
type=str,
help=(
'A list of language codes in a descending priority. For example, if this is set to "de en" it will '
'first try to fetch the german transcript (de) and then fetch the english transcipt (en) if it fails '
'first try to fetch the german transcript (de) and then fetch the english transcript (en) if it fails '
'to do so. As I can\'t provide a complete list of all working language codes with full certainty, you '
'may have to play around with the language codes a bit, to find the one which is working for you!'
),
)
parser.add_argument(
'--exclude-generated',
action='store_const',
const=True,
default=False,
help='If this flag is set transcripts which have been generated by YouTube will not be retrieved.',
)
parser.add_argument(
'--exclude-manually-created',
action='store_const',
const=True,
default=False,
help='If this flag is set transcripts which have been manually created will not be retrieved.',
)
parser.add_argument(
'--json',
action='store_const',
@ -59,13 +103,24 @@ class YouTubeTranscriptCli():
help='If this flag is set the output will be JSON formatted.',
)
parser.add_argument(
'--http-proxy', dest='http_proxy',
default='', metavar='URL',
'--translate',
default='',
help=(
'The language code for the language you want this transcript to be translated to. Use the '
'--list-transcripts feature to find out which languages are translatable and which translation '
'languages are available.'
)
)
parser.add_argument(
'--http-proxy',
default='',
metavar='URL',
help='Use the specified HTTP proxy.'
)
parser.add_argument(
'--https-proxy', dest='https_proxy',
default='', metavar='URL',
'--https-proxy',
default='',
metavar='URL',
help='Use the specified HTTPS proxy.'
)

View File

@ -11,7 +11,7 @@ class CouldNotRetrieveTranscript(Exception):
GITHUB_REFERRAL = (
'\n\nIf you are sure that the described cause is not responsible for this error '
'and that a transcript should be retrievable, please create an issue at '
'https://github.com/jdepoix/youtube-transcript-api/issues.'
'https://github.com/jdepoix/youtube-transcript-api/issues. '
'Please add which version of youtube_transcript_api you are using '
'and provide the information needed to replicate the error. '
'Also make sure that there are no open issues which already describe your problem!'
@ -43,6 +43,18 @@ class TranscriptsDisabled(CouldNotRetrieveTranscript):
CAUSE_MESSAGE = 'Subtitles are disabled for this video'
class NoTranscriptAvailable(CouldNotRetrieveTranscript):
CAUSE_MESSAGE = 'No transcripts are available for this video'
class NotTranslatable(CouldNotRetrieveTranscript):
CAUSE_MESSAGE = 'The requested language is not translatable'
class TranslationLanguageNotAvailable(CouldNotRetrieveTranscript):
CAUSE_MESSAGE = 'The requested translation language is not available'
class NoTranscriptFound(CouldNotRetrieveTranscript):
CAUSE_MESSAGE = (
'No transcripts were found for any of the requested language codes: {requested_language_codes}\n\n'

View File

@ -12,7 +12,14 @@ from xml.etree import ElementTree
import re
from ._html_unescaping import unescape
from ._errors import VideoUnavailable, NoTranscriptFound, TranscriptsDisabled
from ._errors import (
VideoUnavailable,
NoTranscriptFound,
TranscriptsDisabled,
NotTranslatable,
TranslationLanguageNotAvailable,
NoTranscriptAvailable,
)
from ._settings import WATCH_URL
@ -36,9 +43,14 @@ class TranscriptListFetcher():
raise TranscriptsDisabled(video_id)
return json.loads(splitted_html[1].split(',"videoDetails')[0].replace('\n', ''))[
'playerCaptionsTracklistRenderer'
]
captions_json = json.loads(
splitted_html[1].split(',"videoDetails')[0].replace('\n', '')
)['playerCaptionsTracklistRenderer']
if 'captionTracks' not in captions_json:
raise NoTranscriptAvailable(video_id)
return captions_json
def _fetch_html(self, video_id):
return self._http_client.get(WATCH_URL.format(video_id=video_id)).text.replace(
@ -53,10 +65,7 @@ class TranscriptList():
This object represents a list of transcripts. It can be iterated over to list all transcripts which are available
for a given YouTube video. Also it provides functionality to search for a transcript in a given language.
"""
# TODO implement iterator
def __init__(self, video_id, manually_created_transcripts, generated_transcripts):
def __init__(self, video_id, manually_created_transcripts, generated_transcripts, translation_languages):
"""
The constructor is only for internal use. Use the static build method instead.
@ -66,10 +75,13 @@ class TranscriptList():
:type manually_created_transcripts: dict[str, Transcript]
:param generated_transcripts: dict mapping language codes to the generated transcripts
:type generated_transcripts: dict[str, Transcript]
:param translation_languages: list of languages which can be used for translatable languages
:type translation_languages: list[dict[str, str]]
"""
self.video_id = video_id
self._manually_created_transcripts = manually_created_transcripts
self._generated_transcripts = generated_transcripts
self._translation_languages = translation_languages
@staticmethod
def build(http_client, video_id, captions_json):
@ -83,7 +95,7 @@ class TranscriptList():
:param captions_json: the JSON parsed from the YouTube pages static HTML
:type captions_json: dict
:return: the created TranscriptList
:rtype TranscriptList
:rtype TranscriptList:
"""
translation_languages = [
{
@ -108,15 +120,19 @@ class TranscriptList():
caption['name']['simpleText'],
caption['languageCode'],
caption.get('kind', '') == 'asr',
translation_languages if caption['isTranslatable'] else []
translation_languages if caption.get('isTranslatable', False) else []
)
return TranscriptList(
video_id,
manually_created_transcripts,
generated_transcripts,
translation_languages,
)
def __iter__(self):
return iter(list(self._manually_created_transcripts.values()) + list(self._generated_transcripts.values()))
def find_transcript(self, language_codes):
"""
Finds a transcript for a given language code. Manually created transcripts are returned first and only if none
@ -126,9 +142,9 @@ class TranscriptList():
:param language_codes: A list of language codes in a descending priority. For example, if this is set to
['de', 'en'] it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if
it fails to do so.
:type languages: [str]
:type languages: list[str]
:return: the found Transcript
:rtype: Transcript
:rtype Transcript:
:raises: NoTranscriptFound
"""
return self._find_transcript(language_codes, [self._manually_created_transcripts, self._generated_transcripts])
@ -140,9 +156,9 @@ class TranscriptList():
:param language_codes: A list of language codes in a descending priority. For example, if this is set to
['de', 'en'] it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if
it fails to do so.
:type languages: [str]
:type languages: list[str]
:return: the found Transcript
:rtype: Transcript
:rtype Transcript:
:raises: NoTranscriptFound
"""
return self._find_transcript(language_codes, [self._generated_transcripts,])
@ -154,9 +170,9 @@ class TranscriptList():
:param language_codes: A list of language codes in a descending priority. For example, if this is set to
['de', 'en'] it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if
it fails to do so.
:type languages: [str]
:type languages: list[str]
:return: the found Transcript
:rtype: Transcript
:rtype Transcript:
:raises: NoTranscriptFound
"""
return self._find_transcript(language_codes, [self._manually_created_transcripts,])
@ -179,22 +195,28 @@ class TranscriptList():
'(MANUALLY CREATED)\n'
'{available_manually_created_transcript_languages}\n\n'
'(GENERATED)\n'
'{available_generated_transcripts}'
'{available_generated_transcripts}\n\n'
'(TRANSLATION LANGUAGES)\n'
'{available_translation_languages}'
).format(
video_id=self.video_id,
available_manually_created_transcript_languages=self._get_language_description(
self._manually_created_transcripts.values()
str(transcript) for transcript in self._manually_created_transcripts.values()
),
available_generated_transcripts=self._get_language_description(
self._generated_transcripts.values()
str(transcript) for transcript in self._generated_transcripts.values()
),
available_translation_languages=self._get_language_description(
'{language_code} ("{language}")'.format(
language=translation_language['language'],
language_code=translation_language['language_code'],
) for translation_language in self._translation_languages
)
)
def _get_language_description(self, transcripts):
return '\n'.join(
' - {transcript}'.format(transcript=str(transcript))
for transcript in transcripts
) if transcripts else 'None'
def _get_language_description(self, transcript_strings):
description = '\n'.join(' - {transcript}'.format(transcript=transcript) for transcript in transcript_strings)
return description if description else 'None'
class Transcript():
@ -220,45 +242,49 @@ class Transcript():
self.language_code = language_code
self.is_generated = is_generated
self.translation_languages = translation_languages
self._translation_languages_dict = {
translation_language['language_code']: translation_language['language']
for translation_language in translation_languages
}
def fetch(self):
"""
Loads the actual transcript data.
:return: a list of dictionaries containing the 'text', 'start' and 'duration' keys
:rtype: [{'text': str, 'start': float, 'end': float}]
:rtype [{'text': str, 'start': float, 'end': float}]:
"""
return _TranscriptParser().parse(
self._http_client.get(self._url).text
)
def __str__(self):
return '{language_code} ("{language}")'.format(
return '{language_code} ("{language}"){translation_description}'.format(
language=self.language,
language_code=self.language_code,
translation_description='[TRANSLATABLE]' if self.is_translatable else ''
)
# TODO integrate translations in future release
# @property
# def is_translatable(self):
# return len(self.translation_languages) > 0
#
#
# class TranslatableTranscript(Transcript):
# def __init__(self, http_client, url, translation_languages):
# super(TranslatableTranscript, self).__init__(http_client, url)
# self._translation_languages = translation_languages
# self._translation_language_codes = {language['language_code'] for language in translation_languages}
#
#
# def translate(self, language_code):
# if language_code not in self._translation_language_codes:
# raise TranslatableTranscript.TranslationLanguageNotAvailable()
#
# return Transcript(
# self._http_client,
# '{url}&tlang={language_code}'.format(url=self._url, language_code=language_code)
# )
@property
def is_translatable(self):
return len(self.translation_languages) > 0
def translate(self, language_code):
if not self.is_translatable:
raise NotTranslatable(self.video_id)
if language_code not in self._translation_languages_dict:
raise TranslationLanguageNotAvailable(self.video_id)
return Transcript(
self._http_client,
self.video_id,
'{url}&tlang={language_code}'.format(url=self._url, language_code=language_code),
self._translation_languages_dict[language_code],
language_code,
True,
[],
)
class _TranscriptParser():
@ -269,7 +295,7 @@ class _TranscriptParser():
{
'text': re.sub(self.HTML_TAG_REGEX, '', unescape(xml_element.text)),
'start': float(xml_element.attrib['start']),
'duration': float(xml_element.attrib['dur']),
'duration': float(xml_element.attrib.get('dur', '0.0')),
}
for xml_element in ElementTree.fromstring(plain_data)
if xml_element.text is not None

File diff suppressed because one or more lines are too long

View File

@ -5,7 +5,15 @@ import os
import httpretty
from youtube_transcript_api import YouTubeTranscriptApi, VideoUnavailable, NoTranscriptFound, TranscriptsDisabled
from youtube_transcript_api import (
YouTubeTranscriptApi,
TranscriptsDisabled,
NoTranscriptFound,
VideoUnavailable,
NoTranscriptAvailable,
NotTranslatable,
TranslationLanguageNotAvailable,
)
def load_asset(filename):
@ -42,6 +50,51 @@ class TestYouTubeTranscriptApi(TestCase):
]
)
def test_list_transcripts(self):
transcript_list = YouTubeTranscriptApi.list_transcripts('GJLlxj_dtq8')
language_codes = {transcript.language_code for transcript in transcript_list}
self.assertEqual(language_codes, {'zh', 'de', 'en', 'hi', 'ja', 'ko', 'es', 'cs', 'en'})
def test_list_transcripts__find_manually_created(self):
transcript_list = YouTubeTranscriptApi.list_transcripts('GJLlxj_dtq8')
transcript = transcript_list.find_manually_created_transcript(['cs'])
self.assertFalse(transcript.is_generated)
def test_list_transcripts__find_generated(self):
transcript_list = YouTubeTranscriptApi.list_transcripts('GJLlxj_dtq8')
with self.assertRaises(NoTranscriptFound):
transcript_list.find_generated_transcript(['cs'])
transcript = transcript_list.find_generated_transcript(['en'])
self.assertTrue(transcript.is_generated)
def test_translate_transcript(self):
transcript = YouTubeTranscriptApi.list_transcripts('GJLlxj_dtq8').find_transcript(['en'])
translated_transcript = transcript.translate('af')
self.assertEqual(translated_transcript.language_code, 'af')
self.assertIn('&tlang=af', translated_transcript._url)
def test_translate_transcript__translation_language_not_available(self):
transcript = YouTubeTranscriptApi.list_transcripts('GJLlxj_dtq8').find_transcript(['en'])
with self.assertRaises(TranslationLanguageNotAvailable):
transcript.translate('xyz')
def test_translate_transcript__not_translatable(self):
transcript = YouTubeTranscriptApi.list_transcripts('GJLlxj_dtq8').find_transcript(['en'])
transcript.translation_languages = []
with self.assertRaises(NotTranslatable):
transcript.translate('af')
def test_get_transcript__correct_language_is_used(self):
YouTubeTranscriptApi.get_transcript('GJLlxj_dtq8', ['de', 'en'])
query_string = httpretty.last_request().querystring
@ -88,6 +141,16 @@ class TestYouTubeTranscriptApi(TestCase):
with self.assertRaises(NoTranscriptFound):
YouTubeTranscriptApi.get_transcript('GJLlxj_dtq8', languages=['cz'])
def test_get_transcript__exception_if_no_transcript_available(self):
httpretty.register_uri(
httpretty.GET,
'https://www.youtube.com/watch',
body=load_asset('youtube_no_transcript_available.html.static')
)
with self.assertRaises(NoTranscriptAvailable):
YouTubeTranscriptApi.get_transcript('MwBPvcYFY2E')
def test_get_transcripts(self):
video_id_1 = 'video_id_1'
video_id_2 = 'video_id_2'

View File

@ -3,10 +3,27 @@ from mock import MagicMock
import json
from youtube_transcript_api._cli import YouTubeTranscriptCli, YouTubeTranscriptApi
from youtube_transcript_api import YouTubeTranscriptApi, VideoUnavailable
from youtube_transcript_api._cli import YouTubeTranscriptCli
class TestYouTubeTranscriptCli(TestCase):
def setUp(self):
self.transcript_mock = MagicMock()
self.transcript_mock.fetch = MagicMock(return_value=[
{'text': 'Hey, this is just a test', 'start': 0.0, 'duration': 1.54},
{'text': 'this is not the original transcript', 'start': 1.54, 'duration': 4.16},
{'text': 'just something shorter, I made up for testing', 'start': 5.7, 'duration': 3.239}
])
self.transcript_mock.translate = MagicMock(return_value=self.transcript_mock)
self.transcript_list_mock = MagicMock()
self.transcript_list_mock.find_generated_transcript = MagicMock(return_value=self.transcript_mock)
self.transcript_list_mock.find_manually_created_transcript = MagicMock(return_value=self.transcript_mock)
self.transcript_list_mock.find_transcript = MagicMock(return_value=self.transcript_mock)
YouTubeTranscriptApi.list_transcripts = MagicMock(return_value=self.transcript_list_mock)
def test_argument_parsing(self):
parsed_args = YouTubeTranscriptCli('v1 v2 --json --languages de en'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
@ -106,32 +123,107 @@ class TestYouTubeTranscriptCli(TestCase):
self.assertEqual(parsed_args.http_proxy, '')
self.assertEqual(parsed_args.https_proxy, '')
def test_argument_parsing__list_transcripts(self):
parsed_args = YouTubeTranscriptCli('--list-transcripts v1 v2'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertTrue(parsed_args.list_transcripts)
parsed_args = YouTubeTranscriptCli('v1 v2 --list-transcripts'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertTrue(parsed_args.list_transcripts)
def test_argument_parsing__translate(self):
parsed_args = YouTubeTranscriptCli('v1 v2 --languages de en --translate cz'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertEqual(parsed_args.json, False)
self.assertEqual(parsed_args.languages, ['de', 'en'])
self.assertEqual(parsed_args.translate, 'cz')
parsed_args = YouTubeTranscriptCli('v1 v2 --translate cz --languages de en'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertEqual(parsed_args.json, False)
self.assertEqual(parsed_args.languages, ['de', 'en'])
self.assertEqual(parsed_args.translate, 'cz')
def test_argument_parsing__manually_or_generated(self):
parsed_args = YouTubeTranscriptCli('v1 v2 --exclude-manually-created'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertTrue(parsed_args.exclude_manually_created)
self.assertFalse(parsed_args.exclude_generated)
parsed_args = YouTubeTranscriptCli('v1 v2 --exclude-generated'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertFalse(parsed_args.exclude_manually_created)
self.assertTrue(parsed_args.exclude_generated)
parsed_args = YouTubeTranscriptCli('v1 v2 --exclude-manually-created --exclude-generated'.split())._parse_args()
self.assertEqual(parsed_args.video_ids, ['v1', 'v2'])
self.assertTrue(parsed_args.exclude_manually_created)
self.assertTrue(parsed_args.exclude_generated)
def test_run(self):
YouTubeTranscriptApi.get_transcripts = MagicMock(return_value=([], []))
YouTubeTranscriptCli('v1 v2 --languages de en'.split()).run()
YouTubeTranscriptApi.get_transcripts.assert_called_once_with(
['v1', 'v2'],
languages=['de', 'en'],
continue_after_error=True,
proxies=None
YouTubeTranscriptApi.list_transcripts.assert_any_call('v1', proxies=None)
YouTubeTranscriptApi.list_transcripts.assert_any_call('v2', proxies=None)
self.transcript_list_mock.find_transcript.assert_any_call(['de', 'en'])
def test_run__failing_transcripts(self):
YouTubeTranscriptApi.list_transcripts = MagicMock(side_effect=VideoUnavailable('video_id'))
output = YouTubeTranscriptCli('v1 --languages de en'.split()).run()
self.assertEqual(output, str(VideoUnavailable('video_id')))
def test_run__exclude_generated(self):
YouTubeTranscriptCli('v1 v2 --languages de en --exclude-generated'.split()).run()
self.transcript_list_mock.find_manually_created_transcript.assert_any_call(['de', 'en'])
def test_run__exclude_manually_created(self):
YouTubeTranscriptCli('v1 v2 --languages de en --exclude-manually-created'.split()).run()
self.transcript_list_mock.find_generated_transcript.assert_any_call(['de', 'en'])
def test_run__exclude_manually_created_and_generated(self):
self.assertEqual(
YouTubeTranscriptCli('v1 v2 --languages de en --exclude-manually-created --exclude-generated'.split()).run(),
''
)
def test_run__translate(self):
YouTubeTranscriptCli('v1 v2 --languages de en --translate cz'.split()).run(),
self.transcript_mock.translate.assert_any_call('cz')
def test_run__list_transcripts(self):
YouTubeTranscriptCli('--list-transcripts v1 v2'.split()).run()
YouTubeTranscriptApi.list_transcripts.assert_any_call('v1', proxies=None)
YouTubeTranscriptApi.list_transcripts.assert_any_call('v2', proxies=None)
def test_run__json_output(self):
YouTubeTranscriptApi.get_transcripts = MagicMock(return_value=([{'boolean': True}], []))
output = YouTubeTranscriptCli('v1 v2 --languages de en --json'.split()).run()
# will fail if output is not valid json
json.loads(output)
def test_run__proxies(self):
YouTubeTranscriptApi.get_transcripts = MagicMock(return_value=([], []))
YouTubeTranscriptCli(
'v1 v2 --languages de en --http-proxy http://user:pass@domain:port --https-proxy https://user:pass@domain:port'.split()).run()
(
'v1 v2 --languages de en '
'--http-proxy http://user:pass@domain:port '
'--https-proxy https://user:pass@domain:port'
).split()
).run()
YouTubeTranscriptApi.get_transcripts.assert_called_once_with(
['v1', 'v2'],
languages=['de', 'en'],
continue_after_error=True,
YouTubeTranscriptApi.list_transcripts.assert_any_call(
'v1',
proxies={'http': 'http://user:pass@domain:port', 'https': 'https://user:pass@domain:port'}
)
YouTubeTranscriptApi.list_transcripts.assert_any_call(
'v2',
proxies={'http': 'http://user:pass@domain:port', 'https': 'https://user:pass@domain:port'}
)