#coding=utf-8
class Duck:
def quack(self):
print "Quaaaaaack!"
class Bird:
def quack(self):
print "bird imitate duck."
class Doge:
def quack(self):
print "doge imitate duck."
def in_the_forest(duck):
duck.quack()
duck = Duck()
bird = Bird()
doge = Doge()
for x in [duck, bird, doge]:
in_the_forest(x)
import sys
sys.stdout = open('stdout.log', 'a') #只要是file-like,不管是什么类型
print 'foo'
sys.stdout = sys.__stdout__ #恢复
print 'bar'
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