1 avilable_foods=["soup","beaf","noddle","pepper"] 2 request_foods=["soup","rice","beaf","suggar"] 3 for request_food in request_foods: 4     if request_food in avilable_foods: 5         print("adding "+request_food+".") 6     else: 7         print("sorry,we don't support for "+request_food+".") 8 print("finish your food.") 9 print("\n")10 11 customer_list=["lin","kakaxi","daitu","admin","sasik"]12 customer_list=[]13 if customer_list:14     for customer in customer_list:15         if customer =="admin":16             print("hello admin,welcome!")17         else:18             print("hello,"+customer+" thank you for logging")19 else:20     print("we need to find some users.")21     22 current_users=["jack","wang","robot","li","mole"]23 new_users=["zhao","mile","JACK","robot"]24 for new_user in new_users:25     if new_user.lower() in current_users:26         print("the name "+new_user+" is current occpuied")27     else:28         print("welcome to github!")29 print("\n")30 nums = [1,2,3,4,5,6,7,8,9]31 for num  in nums:32     if num == 1:33         print("1st")34     elif num == 2:35         print("2nd")36     elif num == 3:37         print("3rd")38     else:39         print(str(num)+"th")

上述代码为Python中的列表访问练习代码，旨在领会Python中的for循环的便捷之处