Networking Request in Xcode 8.0 Playground.

Networking.swift

import UIKit
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true


let url = URL(string: "http://ip.jsontest.com/")!
let session = URLSession.shared()
let q = session.dataTask(with: url) { data, response, error in
    do {

        if let d = data, let dictionary = try JSONSerialization.jsonObject(with: d, options: []) as? [String: AnyObject] {
            print(dictionary["ip"]!)
       }
    }
    catch {
        print("Error \(error)")
    }
}
q.resume()

This works for me in Xcode 9 Playgrounds by changing

let session = URLSession.shared()
to
let session = URLSession.shared