Python单层for循环

# -*- coding: UTF-8 -*-

I0 = [1,2,3];
I1 = [4,5,6];

print 'connect I0 and I1', I0 + I1

num0 = len(I0)
num1 = len(I1)
print 'length of I0: ', num0

v1 = range(0,num0)
print 'all elements of v1: ', v1

I3 = range(0,num0)
for i in v1:
I3[i] = I0[i] + I1[i]
print 'the', i, 'th element in I3: ', I3[i]

print('Good bye')

connect I0 and I1 [1, 2, 3, 4, 5, 6]
length of I0:  3
all elements of v1:  [0, 1, 2]
the 0 th element in I3:  5
the 1 th element in I3:  7
the 2 th element in I3:  9
Good bye