As of January 1, 2020 this library no longer supports Python 2 on the latest released version.
Library versions released prior to that date will continue to be available. For more information please
visit Python 2 support on Google Cloud.
Source code for google.cloud.translate_v2.client
# Copyright 2016 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Client for interacting with the Google Cloud Translation API."""
import google.api_core.client_options
from google.cloud.client import Client as BaseClient
from google.cloud.translate_v2._http import Connection
ENGLISH_ISO_639 = "en"
"""ISO 639-1 language code for English."""
BASE = "base"
"""Base translation model."""
NMT = "nmt"
"""Neural Machine Translation model."""
[docs]class Client(BaseClient):
"""Client to bundle configuration needed for API requests.
:type target_language: str
:param target_language: (Optional) The target language used for
translations and language names. (Defaults to
:data:`ENGLISH_ISO_639`.)
:type credentials: :class:`~google.auth.credentials.Credentials`
:param credentials: (Optional) The OAuth2 Credentials to use for this
client. If not passed (and if no ``_http`` object is
passed), falls back to the default inferred from the
environment.
:type _http: :class:`~requests.Session`
:param _http: (Optional) HTTP object to make requests. Can be any object
that defines ``request()`` with the same interface as
:meth:`requests.Session.request`. If not passed, an
``_http`` object is created that is bound to the
``credentials`` for the current object.
This parameter should be considered private, and could
change in the future.
:type client_info: :class:`~google.api_core.client_info.ClientInfo`
:param client_info:
The client info used to send a user-agent string along with API
requests. If ``None``, then default info will be used. Generally,
you only need to set this if you're developing your own library
or partner tool.
:type client_options: :class:`~google.api_core.client_options.ClientOptions` or :class:`dict`
:param client_options: (Optional) Client options used to set user options on the client.
API Endpoint should be set through client_options.
"""
SCOPE = ("https://www.googleapis.com/auth/cloud-platform",)
"""The scopes required for authenticating."""
def __init__(
self,
target_language=ENGLISH_ISO_639,
credentials=None,
_http=None,
client_info=None,
client_options=None,
):
self.target_language = target_language
super(Client, self).__init__(credentials=credentials, _http=_http)
kw_args = {"client_info": client_info}
if client_options:
if type(client_options) == dict:
client_options = google.api_core.client_options.from_dict(
client_options
)
if client_options.api_endpoint:
api_endpoint = client_options.api_endpoint
kw_args["api_endpoint"] = api_endpoint
self._connection = Connection(self, **kw_args)
[docs] def get_languages(self, target_language=None):
"""Get list of supported languages for translation.
Response
See
https://cloud.google.com/translate/docs/discovering-supported-languages
:type target_language: str
:param target_language: (Optional) The language used to localize
returned language names. Defaults to the
target language on the current client.
:rtype: list
:returns: List of dictionaries. Each dictionary contains a supported
ISO 639-1 language code (using the dictionary key
``language``). If ``target_language`` is passed, each
dictionary will also contain the name of each supported
language (localized to the target language).
"""
query_params = {}
if target_language is None:
target_language = self.target_language
if target_language is not None:
query_params["target"] = target_language
response = self._connection.api_request(
method="GET", path="/languages", query_params=query_params
)
return response.get("data", {}).get("languages", ())
[docs] def detect_language(self, values):
"""Detect the language of a string or list of strings.
See https://cloud.google.com/translate/docs/detecting-language
:type values: str or list
:param values: String or list of strings that will have
language detected.
:rtype: dict or list
:returns: A list of dictionaries for each queried value. Each
dictionary typically contains three keys
* ``confidence``: The confidence in language detection, a
float between 0 and 1.
* ``input``: The corresponding input value.
* ``language``: The detected language (as an ISO 639-1
language code).
though the key ``confidence`` may not always be present.
If only a single value is passed, then only a single
dictionary will be returned.
:raises: :class:`ValueError <exceptions.ValueError>` if the number of
detections is not equal to the number of values.
:class:`ValueError <exceptions.ValueError>` if a value
produces a list of detections with 0 or multiple results
in it.
"""
single_value = False
if isinstance(values, str):
single_value = True
values = [values]
data = {"q": values}
response = self._connection.api_request(
method="POST", path="/detect", data=data
)
detections = response.get("data", {}).get("detections", ())
if len(values) != len(detections):
raise ValueError(
"Expected same number of values and detections", values, detections
)
for index, value in enumerate(values):
# Empirically, even clearly ambiguous text like "no" only returns
# a single detection, so we replace the list of detections with
# the single detection contained.
if len(detections[index]) == 1:
detections[index] = detections[index][0]
else:
message = (
"Expected a single detection per value, API " "returned %d"
) % (len(detections[index]),)
raise ValueError(message, value, detections[index])
detections[index]["input"] = value
# The ``isReliable`` field is deprecated.
detections[index].pop("isReliable", None)
if single_value:
return detections[0]
else:
return detections
[docs] def translate(
self,
values,
target_language=None,
format_=None,
source_language=None,
customization_ids=(),
model=None,
):
"""Translate a string or list of strings.
See https://cloud.google.com/translate/docs/translating-text
:type values: str or list
:param values: String or list of strings to translate.
:type target_language: str
:param target_language: The language to translate results into. This
is required by the API and defaults to
the target language of the current instance.
:type format_: str
:param format_: (Optional) One of ``text`` or ``html``, to specify
if the input text is plain text or HTML.
:type source_language: str
:param source_language: (Optional) The language of the text to
be translated.
:type customization_ids: str or list
:param customization_ids: (Optional) ID or list of customization IDs
for translation. Sets the ``cid`` parameter
in the query.
:type model: str
:param model: (Optional) The model used to translate the text, such
as ``'base'`` or ``'nmt'``.
:rtype: dict or list
:returns: A list of dictionaries for each queried value. Each
dictionary typically contains three keys (though not
all will be present in all cases)
* ``detectedSourceLanguage``: The detected language (as an
ISO 639-1 language code) of the text.
* ``translatedText``: The translation of the text into the
target language.
* ``input``: The corresponding input value.
* ``model``: The model used to translate the text.
If only a single value is passed, then only a single
dictionary will be returned.
:raises: :class:`~exceptions.ValueError` if the number of
values and translations differ.
"""
single_value = False
if isinstance(values, str):
single_value = True
values = [values]
if target_language is None:
target_language = self.target_language
if isinstance(customization_ids, str):
customization_ids = [customization_ids]
data = {
"target": target_language,
"q": values,
"cid": customization_ids,
"format": format_,
"source": source_language,
"model": model,
}
response = self._connection.api_request(method="POST", path="", data=data)
translations = response.get("data", {}).get("translations", ())
if len(values) != len(translations):
raise ValueError(
"Expected iterations to have same length", values, translations
)
for value, translation in zip(values, translations):
translation["input"] = value
if single_value:
return translations[0]
else:
return translations
