for i,city in enumerate(city_list):
print('%s: %s' %(i+1,city))
# 也可以直接指定开始计数的值
for i,city in enumerate(city_list,7):
print('%s: %s' %(i,city))
运行结果:
1: beijing
2: shanghai
3: tianjing
4: wuhan
7: beijing
8: shanghai
9: tianjing
10: wuhan