// Get the walk animation state  and set its speed
    animation["walk"].speed = 2.0;
    // Get the run animation state and set its weight
    animation["run"].weight = 0.5;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Example() {
        animation["walk"].speed = 2.0F;
        animation["run"].weight = 0.5F;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Example():
        animation['walk'].speed = 2.0F
        animation['run'].weight = 0.5F