#list 

classmates = ['zhichen','wuhao','fengshichun']

print classmates

print len(classmates)

print classmates[1]

print classmates[0]

#print classmates[3]

print classmates[-1]

classmates.append('Amanda')

print classmates

classmates.insert(2,'wangchenmin')

print classmates

classmates.pop()

print classmates

classmates.pop(3)

print classmates

classmates[0] = 'fengshichun'
print classmates

classmates.append(123)
print classmates

print "=============="
list2 = [123,'test',['sub1','sub2'],True]
print list2
print len(list2)

print list2[2][1]

