p := proxylist.NewList()
bad, err := p.FromFile("proxylist.txt", proxylist.Ip4)
// or bad, err := p.FromFileIP4("filename")
if err != nil {
    panic(err)
}

p := proxylist.NewList()
f, err := os.Open("proxylist.txt")
if err != nil {
    panic(err)
}

bad, err := p.FromReader(f, proxylist.Ip4)
// or bad, err := p.FromReaderIP4(f)
if err != nil {
    panic(err)
}

resource := "site.com" // any resource name using a proxy
proxy := p.GetFreeIP4(resource)
// or proxy := p.GetFree(resource, proxylist.Ip4)
if proxy == nil {
    panic("No free proxies.")
}

resource := "site.com" // any resource name using a proxy
p.SetFreeIP4(resource, proxy)
// or p.SetFree(resource, proxylist.Ip4)

p.NumIP4()
// or p.Num(proxylist.Ip4)

resource := "site.com" // any resource name using a proxy
p.NumFreeIP4(resource)
// or p.NumFree(resource, proxylist.Ip4)

resource := "site.com" // any resource name using a proxy
p.NumBusyIP4(resource)
// or p.NumBusy(resource, proxylist.Ip4)