python中二元元组的使用

#! /usr/bin/python
# _* _coding:UTF-8 _*_

# the use of 2-tuple
fruit1=("apple","banana")
fruit2=("grape","orange")
tuple1=(fruit1,fruit2)
print tuple1
print tuple1[0][1]
print tuple1[1][1]

print "################################################################################"

# the package and unpackage

tuple3=("apple","banana","grape","orange")
a,b,c,d=tuple3
print a,b,c,d

print "################################################################################"

#traverse the tuple
tuple4=(("apple","banana"),("grape","orange"),("watermelon",),("grapefulit",))
for i in range(len(tuple4)):
    print "tuple[%d]:" %i,"",
    for j in range(len(tuple4[i])):
        print tuple4[i][j],"",
    print

print "################################################################################"

# map()
tuple5=(("apple","banana"),("grape","orange"),("watermelon",),("grapefulit",))
k=0
for a in map(None,tuple5) :
    print "tuple[%d]:" %k,"",
    for x in a :
        print x,"",
    print
    k+=1