function Start() {
    renderer.material.shader = Shader.Find("Specular");
    print(renderer.material.GetFloat("_Shininess"));
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Start() {
        renderer.material.shader = Shader.Find("Specular");
        print(renderer.material.GetFloat("_Shininess"));
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Start():
        renderer.material.shader = Shader.Find('Specular')
        print(renderer.material.GetFloat('_Shininess'))