python 迭代工具

names = ['anne', 'beth', 'george', 'damon']
ages = [, , , ]

for name,age in zip(names,ages):
    #print('name:'+ name + ',ages:' + str(age))
    print("name:",name,"ages:",age)

result:

name: anne ages:
name: beth ages:
name: george ages:
name: damon ages: 

example2:

a = ['aaa','bbb','ccc','ddd']
for index, aaa in enumerate(a):
    if 'aaa' in aaa:
        a[index] = 'bbb'

print(a)

result :

['bbb', 'bbb', 'ccc', 'ddd']