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main.go
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main.go
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package main
import (
"bufio"
"fmt"
"log"
"os"
"regexp"
"sort"
"strconv"
"strings"
"github.com/danielinspring/go-tflite"
)
const (
START = "<START>"
PAD = "<PAD>"
UNKNOWN = "<UNKNOWN>"
)
const (
SENTENCE_LEN = 256
)
func loadDictionary(fname string) (map[string]int, error) {
f, err := os.Open("vocab.txt")
if err != nil {
return nil, err
}
defer f.Close()
dic := make(map[string]int)
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := strings.Split(scanner.Text(), " ")
if len(line) < 2 {
continue
}
n, err := strconv.Atoi(line[1])
if err != nil {
continue
}
dic[line[0]] = n
}
return dic, nil
}
func loadLabels(fname string) ([]string, error) {
f, err := os.Open(fname)
if err != nil {
return nil, err
}
defer f.Close()
var labels []string
scanner := bufio.NewScanner(f)
for scanner.Scan() {
labels = append(labels, scanner.Text())
}
return labels, nil
}
func main() {
dic, err := loadDictionary("vocab.txt")
if err != nil {
log.Fatal(err)
}
labels, err := loadLabels("labels.txt")
if err != nil {
log.Fatal(err)
}
model := tflite.NewModelFromFile("text_classification.tflite")
if model == nil {
log.Println("cannot load model")
return
}
defer model.Delete()
interpreter := tflite.NewInterpreter(model, nil)
defer interpreter.Delete()
re := regexp.MustCompile(" |\\,|\\.|\\!|\\?|\n")
r := bufio.NewReader(os.Stdin)
for {
fmt.Print("> ")
b, _, err := r.ReadLine()
if err != nil {
break
}
text := string(b)
tokens := re.Split(strings.TrimSpace(text), -1)
index := 0
tmp := make([]float32, SENTENCE_LEN)
if n, ok := dic[START]; ok {
tmp[index] = float32(n)
index++
}
for _, word := range tokens {
if index >= SENTENCE_LEN {
break
}
if v, ok := dic[word]; ok {
tmp[index] = float32(v)
} else {
tmp[index] = float32(dic[UNKNOWN])
}
index++
}
for i := index; i < SENTENCE_LEN; i++ {
tmp[i] = float32(dic[PAD])
}
interpreter.AllocateTensors()
copy(interpreter.GetInputTensor(0).Float32s(), tmp)
interpreter.Invoke()
type rank struct {
label string
poll float32
}
ranks := []rank{}
for i, v := range interpreter.GetOutputTensor(0).Float32s() {
ranks = append(ranks, rank{
label: labels[i],
poll: v,
})
}
sort.Slice(ranks, func(i, j int) bool {
return ranks[i].poll < ranks[j].poll
})
for _, rank := range ranks {
fmt.Printf(" %s: %v\n", rank.label, rank.poll)
}
}
}