确定文本中传达的关于实体的情感（积极还是消极）。
深入探索
如需查看包含此代码示例的详细文档，请参阅以下内容：
代码示例
Go
func analyzeEntitySentiment(ctx context.Context, client *language.Client, text string) (*languagepb.AnalyzeEntitySentimentResponse, error) {
return client.AnalyzeEntitySentiment(ctx, &languagepb.AnalyzeEntitySentimentRequest{
Document: &languagepb.Document{
Source: &languagepb.Document_Content{
Content: text,
},
Type: languagepb.Document_PLAIN_TEXT,
},
})
}
Java
// Instantiate the Language client com.google.cloud.language.v1.LanguageServiceClient
try (LanguageServiceClient language = LanguageServiceClient.create()) {
Document doc = Document.newBuilder().setContent(text).setType(Type.PLAIN_TEXT).build();
AnalyzeEntitySentimentRequest request =
AnalyzeEntitySentimentRequest.newBuilder()
.setDocument(doc)
.setEncodingType(EncodingType.UTF16)
.build();
// Detect entity sentiments in the given string
AnalyzeEntitySentimentResponse response = language.analyzeEntitySentiment(request);
// Print the response
for (Entity entity : response.getEntitiesList()) {
System.out.printf("Entity: %s\n", entity.getName());
System.out.printf("Salience: %.3f\n", entity.getSalience());
System.out.printf("Sentiment : %s\n", entity.getSentiment());
for (EntityMention mention : entity.getMentionsList()) {
System.out.printf("Begin offset: %d\n", mention.getText().getBeginOffset());
System.out.printf("Content: %s\n", mention.getText().getContent());
System.out.printf("Magnitude: %.3f\n", mention.getSentiment().getMagnitude());
System.out.printf("Sentiment score : %.3f\n", mention.getSentiment().getScore());
System.out.printf("Type: %s\n\n", mention.getType());
}
}
}Node.js
// Imports the Google Cloud client library
const language = require('@google-cloud/language');
// Creates a client
const client = new language.LanguageServiceClient();
/**
* TODO(developer): Uncomment the following line to run this code.
*/
// const text = 'Your text to analyze, e.g. Hello, world!';
// Prepares a document, representing the provided text
const document = {
content: text,
type: 'PLAIN_TEXT',
};
// Detects sentiment of entities in the document
const [result] = await client.analyzeEntitySentiment({document});
const entities = result.entities;
console.log('Entities and sentiments:');
entities.forEach(entity => {
console.log(` Name: ${entity.name}`);
console.log(` Type: ${entity.type}`);
console.log(` Score: ${entity.sentiment.score}`);
console.log(` Magnitude: ${entity.sentiment.magnitude}`);
});PHP
use Google\Cloud\Language\V1\Document;
use Google\Cloud\Language\V1\Document\Type;
use Google\Cloud\Language\V1\LanguageServiceClient;
use Google\Cloud\Language\V1\Entity\Type as EntityType;
/**
* @param string $text The text to analyze
*/
function analyze_entity_sentiment(string $text): void
{
$languageServiceClient = new LanguageServiceClient();
// Create a new Document, add text as content and set type to PLAIN_TEXT
$document = (new Document())
->setContent($text)
->setType(Type::PLAIN_TEXT);
// Call the analyzeEntitySentiment function
$response = $languageServiceClient->analyzeEntitySentiment($document);
$entities = $response->getEntities();
// Print out information about each entity
foreach ($entities as $entity) {
printf('Entity Name: %s' . PHP_EOL, $entity->getName());
printf('Entity Type: %s' . PHP_EOL, EntityType::name($entity->getType()));
printf('Entity Salience: %s' . PHP_EOL, $entity->getSalience());
$sentiment = $entity->getSentiment();
if ($sentiment) {
printf('Entity Magnitude: %s' . PHP_EOL, $sentiment->getMagnitude());
printf('Entity Score: %s' . PHP_EOL, $sentiment->getScore());
}
print(PHP_EOL);
}
}Python
from google.cloud import language_v1
def sample_analyze_entity_sentiment(text_content):
"""
Analyzing Entity Sentiment in a String
Args:
text_content The text content to analyze
"""
client = language_v1.LanguageServiceClient()
# text_content = 'Grapes are good. Bananas are bad.'
# Available types: PLAIN_TEXT, HTML
type_ = language_v1.types.Document.Type.PLAIN_TEXT
# Optional. If not specified, the language is automatically detected.
# For list of supported languages:
# https://cloud.google.com/natural-language/docs/languages
language = "en"
document = {"content": text_content, "type_": type_, "language": language}
# Available values: NONE, UTF8, UTF16, UTF32
encoding_type = language_v1.EncodingType.UTF8
response = client.analyze_entity_sentiment(
request={"document": document, "encoding_type": encoding_type}
)
# Loop through entitites returned from the API
for entity in response.entities:
print("Representative name for the entity: {}".format(entity.name))
# Get entity type, e.g. PERSON, LOCATION, ADDRESS, NUMBER, et al
print("Entity type: {}".format(language_v1.Entity.Type(entity.type_).name))
# Get the salience score associated with the entity in the [0, 1.0] range
print("Salience score: {}".format(entity.salience))
# Get the aggregate sentiment expressed for this entity in the provided document.
sentiment = entity.sentiment
print("Entity sentiment score: {}".format(sentiment.score))
print("Entity sentiment magnitude: {}".format(sentiment.magnitude))
# Loop over the metadata associated with entity. For many known entities,
# the metadata is a Wikipedia URL (wikipedia_url) and Knowledge Graph MID (mid).
# Some entity types may have additional metadata, e.g. ADDRESS entities
# may have metadata for the address street_name, postal_code, et al.
for metadata_name, metadata_value in entity.metadata.items():
print("{} = {}".format(metadata_name, metadata_value))
# Loop over the mentions of this entity in the input document.
# The API currently supports proper noun mentions.
for mention in entity.mentions:
print("Mention text: {}".format(mention.text.content))
# Get the mention type, e.g. PROPER for proper noun
print(
"Mention type: {}".format(
language_v1.EntityMention.Type(mention.type_).name
)
)
# Get the language of the text, which will be the same as
# the language specified in the request or, if not specified,
# the automatically-detected language.
print("Language of the text: {}".format(response.language))
后续步骤
如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。