【自然言語処理】Google Natural Language API Client LibrariesをGoで実装してみる ref: http://qiita.com/Sekky0905/items/0a07ac74518b26816e04

file0.txt

go get -u cloud.google.com/go/language/apiv1

file1.go

package main

import (
    "cloud.google.com/go/language/apiv1"
    "encoding/json"
    "fmt"
    "golang.org/x/net/context"
    languagepb "google.golang.org/genproto/googleapis/cloud/language/v1"
    "log"
)

func main() {
    doAnalyze()
}

func doAnalyze() {
    // コンテキスト生成
    ctx := context.Background()

    // クライアント生成
    client, err := language.NewClient(ctx)

    if err != nil {
        log.Fatalf("Failed to create client: %v", err)
    }

    // 分析するテキストを宣言
    text := "Natural Language API Client LibrariesクライアントをGoで実装してみる。"

    // AnalyzeSyntaxRequest構造体を生成
    req := &languagepb.AnalyzeSyntaxRequest{
        Document: &languagepb.Document{
            // 指定なし 0
            // Plain text 1
            // HTML 2
            Type: 1,
            // 分析する内容
            Source: &languagepb.Document_Content{
                Content: text,
            },
        },
        EncodingType: languagepb.EncodingType_UTF8,
    }

    // 構文解析を行う
    resp, err := client.AnalyzeSyntax(ctx, req)
    if err != nil {
        log.Fatalf("Failed to AnalyzeSyntax: %v", err)
    }

    // jsonにする
    rawJson, err := json.Marshal(resp)

    if err != nil {
        log.Fatalf("Failed to Marshal json: %v", err)
    }

    jsonStr := string(rawJson)

    fmt.Println("構文解析の結果\n" + jsonStr)

}

file2.txt

{
    "sentences": [
        {
            "text": {
                "content": "Natural Language API Client LibrariesクライアントをGoで実装してみる。"
            }
        }
    ],
    "tokens": [
        {
            "text": {
                "content": "Natural"
            },
            "part_of_speech": {
                "tag": 12,
                "proper": 1
            },
            "dependency_edge": {
                "head_token_index": 5,
                "label": 26
            },
            "lemma": "Natural"
        },
        {
            "text": {
                "content": "Language",
                "begin_offset": 8
            },
            "part_of_speech": {
                "tag": 6,
                "proper": 1
            },
            "dependency_edge": {
                "head_token_index": 2,
                "label": 26
            },
            "lemma": "Language"
        },
        {
            "text": {
                "content": "API",
                "begin_offset": 17
            },
            "part_of_speech": {
                "tag": 6,
                "proper": 1
            },
            "dependency_edge": {
                "head_token_index": 5,
                "label": 26
            },
            "lemma": "API"
        },
        {
            "text": {
                "content": "Client",
                "begin_offset": 21
            },
            "part_of_speech": {
                "tag": 6,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 4,
                "label": 26
            },
            "lemma": "Client"
        },
        {
            "text": {
                "content": "Libraries",
                "begin_offset": 28
            },
            "part_of_speech": {
                "tag": 6,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 5,
                "label": 26
            },
            "lemma": "Libraries"
        },
        {
            "text": {
                "content": "クライアント",
                "begin_offset": 37
            },
            "part_of_speech": {
                "tag": 6,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 18
            },
            "lemma": "クライアント"
        },
        {
            "text": {
                "content": "を",
                "begin_offset": 55
            },
            "part_of_speech": {
                "tag": 9,
                "case": 1,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 5,
                "label": 45
            },
            "lemma": "を"
        },
        {
            "text": {
                "content": "Go",
                "begin_offset": 58
            },
            "part_of_speech": {
                "tag": 12,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 64
            },
            "lemma": "Go"
        },
        {
            "text": {
                "content": "で",
                "begin_offset": 60
            },
            "part_of_speech": {
                "tag": 9,
                "case": 2,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 7,
                "label": 45
            },
            "lemma": "で"
        },
        {
            "text": {
                "content": "実装",
                "begin_offset": 63
            },
            "part_of_speech": {
                "tag": 6,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 54
            },
            "lemma": "実装"
        },
        {
            "text": {
                "content": "し",
                "begin_offset": 69
            },
            "part_of_speech": {
                "tag": 11,
                "form": 5,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 24
            },
            "lemma": "する"
        },
        {
            "text": {
                "content": "て",
                "begin_offset": 72
            },
            "part_of_speech": {
                "tag": 9,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 45
            },
            "lemma": "て"
        },
        {
            "text": {
                "content": "みる",
                "begin_offset": 75
            },
            "part_of_speech": {
                "tag": 11,
                "form": 4,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 66
            },
            "lemma": "みる"
        },
        {
            "text": {
                "content": "。",
                "begin_offset": 81
            },
            "part_of_speech": {
                "tag": 10,
                "proper": 2
            },
            "dependency_edge": {
                "head_token_index": 9,
                "label": 32
            },
            "lemma": "。"
        }
    ],
    "language": "ja"
}