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我想安装go-fastping。但是当我尝试时，发生了这种情况：第一个月

go: go.mod file not found in current directory or any parent directory.
        'go get' is no longer supported outside a module.
        To build and install a command, use 'go install' with a version,
        like 'go install example.com/cmd@latest'
        For more information, see https://golang.org/doc/go-get-install-deprecation
        or run 'go help get' or 'go help install'.

所以我改为安装：go install github.com/tatsushid/go-fastping

Try 'go install github.com/tatsushid/go-fastping@latest' to install the latest version ```

and after I did changed to: `go install github.com/tatsushid/go-fastping@latest`

it worked but when I try to add it in the code it says that the module is not installed.