Animation.this [string name]  

// 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 Awake() {
animation["walk"].speed = 2.0F;
animation["run"].weight = 0.5F;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

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