我正在从Go代码中调用python脚本:
package main
import (
"os/exec"
"os"
"fmt"
"time"
"encoding/json"
)
func main() {
cmd := exec.Command("python","/home/devendra/Desktop/sync/blur_multithread.py","http://4.imimg.com/data4/TP/ED/NSDMERP-28759633/audiovideojocks.png")
var logs=make(map[string]interface{})
logs["tes"]=os.Stdout
_ = cmd.Run()
WriteLogs(logs)//Writelog is my function which logs everything in a file
}
func WriteLogs(logs map[string]interface{}){
currentTime := time.Now().Local()
jsonLog, err := json.Marshal(logs)
if err != nil {
fmt.Println(err.Error())
}
jsonLogString := string(jsonLog[:len(jsonLog)])
logfile := "/home/devendra/ImageServiceLogs/"+ "ImageServiceLogs_" + currentTime.Format("2006-01-02") + ".txt"
if logfile == "" {
fmt.Println("Could not find logfile in configuration ...!!!")
} else {
jsonLogFile, err := os.OpenFile(logfile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
defer jsonLogFile.Close()
if err != nil {
fmt.Println(err.Error())
}
jsonLogFile.WriteString(jsonLogString + "\n")
}
}
但是当我的python脚本给我输出时,tes字段的日志值是null。如何在我的代码中获取python脚本的输出?
答案 0 :(得分:2)
根据官方文档示例,exec.Cmd.Ouput() ([]byte, error)
将在命令完成运行后为您提供命令的标准输出。
https://golang.org/pkg/os/exec/#Cmd.Output
package main
import (
"fmt"
"log"
"os/exec"
)
func main() {
out, err := exec.Command("date").Output()
if err != nil {
log.Fatal(err)
}
fmt.Printf("The date is %s\n", out)
}
要同时接收该过程的stdout和stderr,编写者应使用exec.Cmd.CombinedOutput
https://golang.org/pkg/os/exec/#Cmd.CombinedOutput
如果有人想实时接收到其终端的命令输出,则编写者应将exec.Cmd.Stdout
和exec.Cmd.Stderr
属性分别设置为os.Stdout
和os.Stderr
并调用exec.Cmd.Run() error
方法。
https://golang.org/pkg/os/exec/#Cmd https://golang.org/pkg/os/exec/#Cmd.Run
package main
import (
"fmt"
"log"
"os"
"os/exec"
)
func main() {
cmd := exec.Command("date")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
log.Fatal(err)
}
fmt.Printf("The date is %s\n", out)
}
要转发输出并同时捕获输出,编写者应寻求io
软件包的帮助,以使用io.MultiWriter
https://golang.org/pkg/io/#MultiWriter
package main
import (
"fmt"
"io"
"log"
"os"
"os/exec"
)
func main() {
stdout := new(bytes.Bufer)
stderr := new(bytes.Bufer)
cmd := exec.Command("date")
cmd.Stdout = io.MultiWriter(os.Stdout, stdout)
cmd.Stderr = io.MultiWriter(os.Stderr, stderr)
err := cmd.Run()
if err != nil {
log.Fatal(err)
}
fmt.Printf("The date is %s\n", out)
}
或者,您可以利用exec.Cmd.{Stdout,Stderr}Pipe()
参见官方文档示例https://golang.org/pkg/os/exec/#Cmd.StdoutPipe