googletrans/client.py
# -*- coding: utf-8 -*-
"""
A Translation module.
You can translate text using this module.
"""
import random
import typing
import httpcore
import httpx
from httpx import Timeout
from googletrans import urls, utils
from googletrans.gtoken import TokenAcquirer
from googletrans.constants import (
DEFAULT_USER_AGENT, LANGCODES, LANGUAGES, SPECIAL_CASES,
DEFAULT_RAISE_EXCEPTION, DUMMY_DATA
)
from googletrans.models import Translated, Detected
EXCLUDES = ('en', 'ca', 'fr')
class Translator:
"""Google Translate ajax API implementation class
You have to create an instance of Translator to use this API
:param service_urls: google translate url list. URLs will be used randomly.
For example ``['translate.google.com', 'translate.google.co.kr']``
:type service_urls: a sequence of strings
:param user_agent: the User-Agent header to send when making requests.
:type user_agent: :class:`str`
:param proxies: proxies configuration.
Dictionary mapping protocol or protocol and host to the URL of the proxy
For example ``{'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}``
:type proxies: dictionary
:param timeout: Definition of timeout for httpx library.
Will be used for every request.
:type timeout: number or a double of numbers
:param proxies: proxies configuration.
Dictionary mapping protocol or protocol and host to the URL of the proxy
For example ``{'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}``
:param raise_exception: if `True` then raise exception if smth will go wrong
:type raise_exception: boolean
"""
def __init__(self, service_urls=None, user_agent=DEFAULT_USER_AGENT,
raise_exception=DEFAULT_RAISE_EXCEPTION,
proxies: typing.Dict[str, httpcore.SyncHTTPTransport] = None,
timeout: Timeout = None,
http2=True):
self.client = httpx.Client(http2=http2)
if proxies is not None: # pragma: nocover
self.client.proxies = proxies
self.client.headers.update({
'User-Agent': user_agent,
})
if timeout is not None:
self.client.timeout = timeout
self.service_urls = service_urls or ['translate.google.com']
self.token_acquirer = TokenAcquirer(
client=self.client, host=self.service_urls[0])
self.raise_exception = raise_exception
def _pick_service_url(self):
if len(self.service_urls) == 1:
return self.service_urls[0]
return random.choice(self.service_urls)
def _translate(self, text, dest, src, override):
token = self.token_acquirer.do(text)
params = utils.build_params(query=text, src=src, dest=dest,
token=token, override=override)
url = urls.TRANSLATE.format(host=self._pick_service_url())
r = self.client.get(url, params=params)
if r.status_code == 200:
data = utils.format_json(r.text)
return data, r
if self.raise_exception:
raise Exception('Unexpected status code "{}" from {}'.format(
r.status_code, self.service_urls))
DUMMY_DATA[0][0][0] = text
return DUMMY_DATA, r
def _parse_extra_data(self, data):
response_parts_name_mapping = {
0: 'translation',
1: 'all-translations',
2: 'original-language',
5: 'possible-translations',
6: 'confidence',
7: 'possible-mistakes',
8: 'language',
11: 'synonyms',
12: 'definitions',
13: 'examples',
14: 'see-also',
}
extra = {}
for index, category in response_parts_name_mapping.items():
extra[category] = data[index] if (
index < len(data) and data[index]) else None
return extra
def translate(self, text, dest='en', src='auto', **kwargs):
"""Translate text from source language to destination language
:param text: The source text(s) to be translated. Batch translation is supported via sequence input.
:type text: UTF-8 :class:`str`; :class:`unicode`; string sequence (list, tuple, iterator, generator)
:param dest: The language to translate the source text into.
The value should be one of the language codes listed in :const:`googletrans.LANGUAGES`
or one of the language names listed in :const:`googletrans.LANGCODES`.
:param dest: :class:`str`; :class:`unicode`
:param src: The language of the source text.
The value should be one of the language codes listed in :const:`googletrans.LANGUAGES`
or one of the language names listed in :const:`googletrans.LANGCODES`.
If a language is not specified,
the system will attempt to identify the source language automatically.
:param src: :class:`str`; :class:`unicode`
:rtype: Translated
:rtype: :class:`list` (when a list is passed)
Basic usage:
>>> from googletrans import Translator
>>> translator = Translator()
>>> translator.translate('안녕하세요.')
<Translated src=ko dest=en text=Good evening. pronunciation=Good evening.>
>>> translator.translate('안녕하세요.', dest='ja')
<Translated src=ko dest=ja text=こんにちは。 pronunciation=Kon'nichiwa.>
>>> translator.translate('veritas lux mea', src='la')
<Translated src=la dest=en text=The truth is my light pronunciation=The truth is my light>
Advanced usage:
>>> translations = translator.translate(['The quick brown fox', 'jumps over', 'the lazy dog'], dest='ko')
>>> for translation in translations:
... print(translation.origin, ' -> ', translation.text)
The quick brown fox -> 빠른 갈색 여우
jumps over -> 이상 점프
the lazy dog -> 게으른 개
"""
dest = dest.lower().split('_', 1)[0]
src = src.lower().split('_', 1)[0]
if src != 'auto' and src not in LANGUAGES:
if src in SPECIAL_CASES:
src = SPECIAL_CASES[src]
elif src in LANGCODES:
src = LANGCODES[src]
else:
raise ValueError('invalid source language')
if dest not in LANGUAGES:
if dest in SPECIAL_CASES:
dest = SPECIAL_CASES[dest]
elif dest in LANGCODES:
dest = LANGCODES[dest]
else:
raise ValueError('invalid destination language')
if isinstance(text, list):
result = []
for item in text:
translated = self.translate(item, dest=dest, src=src, **kwargs)
result.append(translated)
return result
origin = text
data, response = self._translate(text, dest, src, kwargs)
# this code will be updated when the format is changed.
translated = ''.join([d[0] if d[0] else '' for d in data[0]])
extra_data = self._parse_extra_data(data)
# actual source language that will be recognized by Google Translator when the
# src passed is equal to auto.
try:
src = data[2]
except Exception: # pragma: nocover
pass
pron = origin
try:
pron = data[0][1][-2]
except Exception: # pragma: nocover
pass
if pron is None:
try:
pron = data[0][1][2]
except: # pragma: nocover
pass
if dest in EXCLUDES and pron == origin:
pron = translated
# put final values into a new Translated object
result = Translated(src=src, dest=dest, origin=origin,
text=translated, pronunciation=pron,
extra_data=extra_data,
response=response)
return result
def detect(self, text, **kwargs):
"""Detect language of the input text
:param text: The source text(s) whose language you want to identify.
Batch detection is supported via sequence input.
:type text: UTF-8 :class:`str`; :class:`unicode`; string sequence (list, tuple, iterator, generator)
:rtype: Detected
:rtype: :class:`list` (when a list is passed)
Basic usage:
>>> from googletrans import Translator
>>> translator = Translator()
>>> translator.detect('이 문장은 한글로 쓰여졌습니다.')
<Detected lang=ko confidence=0.27041003>
>>> translator.detect('この文章は日本語で書かれました。')
<Detected lang=ja confidence=0.64889508>
>>> translator.detect('This sentence is written in English.')
<Detected lang=en confidence=0.22348526>
>>> translator.detect('Tiu frazo estas skribita en Esperanto.')
<Detected lang=eo confidence=0.10538048>
Advanced usage:
>>> langs = translator.detect(['한국어', '日本語', 'English', 'le français'])
>>> for lang in langs:
... print(lang.lang, lang.confidence)
ko 1
ja 0.92929292
en 0.96954316
fr 0.043500196
"""
if isinstance(text, list):
result = []
for item in text:
lang = self.detect(item)
result.append(lang)
return result
data, response = self._translate(text, 'en', 'auto', kwargs)
# actual source language that will be recognized by Google Translator when the
# src passed is equal to auto.
src = ''
confidence = 0.0
try:
if len(data[8][0]) > 1:
src = data[8][0]
confidence = data[8][-2]
else:
src = ''.join(data[8][0])
confidence = data[8][-2][0]
except Exception: # pragma: nocover
pass
result = Detected(lang=src, confidence=confidence, response=response)
return result