Add whisper to the examples directory (#4)

* Add whisper to the examples directory

* Add whisper to the readme

README.md

@@ -7,6 +7,7 @@ Go client libraries for OpenAI APIs. Supported APIs:
 ✅ edits
 🚧 images
 ✅ moderations
+✅ whisper
 ```
 
 Set your [API key](https://platform.openai.com/account/api-keys)

examples/whisper/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+
+	"github.com/rakyll/openai-go"
+	"github.com/rakyll/openai-go/whisper"
+)
+
+func main() {
+	sesh := openai.NewSession(os.Getenv("OPENAI_API_KEY"))
+	wc := whisper.NewClient(sesh, "")
+	filePath := os.Getenv("AUDIO_FILE_PATH")
+	if filePath == "" {
+		log.Fatal("must provide an AUDIO_FILE_PATH env var")
+	}
+	f, err := os.Open(filePath)
+	if err != nil {
+		log.Fatalf("error opening audio file: %v", err)
+	}
+	defer f.Close()
+	resp, err := wc.Transcribe(context.TODO(), &whisper.CreateCompletionParams{
+		Language:    "en",
+		Audio:       f,
+		AudioFormat: "mp3",
+	})
+	if err != nil {
+		log.Fatalf("error transcribing file: %v", err)
+	}
+	log.Println(resp.Text)
+}