非正常研究-----python with 语句研究

import sys
class test:
def __enter__(self):
print "enter"
return 1
def __exit__(self,*args):
print "exit"
return True

with test() as t:
print "t is not the result of test().it is __enter__ returned"
print "t is 1,yes,it is {0}".format(t)
#raise NameError("hi here")
#sys.exit()
print "Never here"