Create a io.Reader from a local file

Question

I would like to open a local file, and return a io.Reader. The reason is that I need to feed a io.Reader to a library I am using, like:

Answer 1

os.Open returns an io.Reader

http://play.golang.org/p/BskGT09kxL

package main

import (
    "fmt"
    "io"
    "os"
)

var _ io.Reader = (*os.File)(nil)

func main() {
    fmt.Println("Hello, playground")
}