如何在Golang中将值列表放入标记中? [英] How to get a list of values into a flag in Golang?

问题描述

Golang与以下python命令等效吗?

What is Golang's equivalent of the below python commands ?

import argparse
parser = argparse.ArgumentParser(description="something")
parser.add_argument("-getList1",nargs='*',help="get 0 or more values")
parser.add_argument("-getList2",nargs='?',help="get 1 or more values")

我已经看到flag包允许在Golang中解析参数. 但它似乎仅支持String，Int或Bool. 如何以这种格式将值列表转换成标志:

I have seen that the flag package allows argument parsing in Golang. But it seems to support only String, Int or Bool. How to get a list of values into a flag in this format :

go run myCode.go -getList1 value1 value2 

推荐答案

您可以定义自己的flag.Value并使用flag.Var()进行绑定.

You can define your own flag.Value and use flag.Var() for binding it.

示例为此处.

然后您可以传递多个标志，如下所示:

Then you can pass multiple flags like following:

go run your_file.go --list1 value1 --list1 value2

UPD:为了防止万一，请在其中添加代码段.

UPD: including code snippet right there just in case.

package main

import "flag"

type arrayFlags []string

func (i *arrayFlags) String() string {
    return "my string representation"
}

func (i *arrayFlags) Set(value string) error {
    *i = append(*i, value)
    return nil
}

var myFlags arrayFlags

func main() {
    flag.Var(&myFlags, "list1", "Some description for this param.")
    flag.Parse()
}

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