add Language Translator V3 examples (#499)

Author: g-may

examples/language_translator_v3.py

@@ -0,0 +1,56 @@
+# coding=utf-8
+from __future__ import print_function
+import json
+from watson_developer_cloud import LanguageTranslatorV3
+
+language_translator = LanguageTranslatorV3(
+    version='2018-05-31',
+    ### url is optional, and defaults to the URL below. Use the correct URL for your region.
+    # url='https://gateway.watsonplatform.net/language-translator/api',
+    iam_api_key='your_api_key')
+
+## Authenticate with username/password if your service instance doesn't provide an API key
+# language_translator = LanguageTranslatorV3(
+#     version='2018-05-31',
+#     username='your_username',
+#     password='your_password')
+
+
+## Translate
+translation = language_translator.translate(
+    text='Hello',
+    model_id='en-es')
+print(json.dumps(translation, indent=2, ensure_ascii=False))
+
+## List identifiable languages
+# languages = language_translator.list_identifiable_languages()
+# print(json.dumps(languages, indent=2))
+
+## Identify
+# language = language_translator.identify(
+#     'Language translator translates text from one language to another')
+# print(json.dumps(language, indent=2))
+
+## List models
+# models = language_translator.list_models(
+#     source='en')
+# print(json.dumps(models, indent=2))
+
+## Create model
+# with open('glossary.tmx', 'rb') as glossary:
+#   response = language_translator.create_model(
+#     base_model_id = 'en-es',
+#     name = 'custom-english-to-spanish',
+#     forced_glossary = glossary)
+#   print(json.dumps(response, indent=2))
+
+## Delete model
+# print(json.dumps(language_translator.delete_model(model_id='9f8d9c6f-2123-462f-9793-f17fdcb77cd6'), indent=2))
+
+## Get model details
+# model = language_translator.get_model(model_id='fdadfc3b-0b96-4276-a6e5-f5c4a29711fc')
+# print(json.dumps(model, indent=2))
+
+
+
+