Python学习第四篇——列表访问与判定

avilable_foods=["soup","beaf","noddle","pepper"]
request_foods=["soup","rice","beaf","suggar"]
for request_food in request_foods:
    if request_food in avilable_foods:
        print("adding "+request_food+".")
    else:
        print("sorry,we don't support for "+request_food+".")
print("finish your food.")
print("
")

customer_list=["lin","kakaxi","daitu","admin","sasik"]
customer_list=[]
if customer_list:
    for customer in customer_list:
        if customer =="admin":
            print("hello admin,welcome!")
        else:
            print("hello,"+customer+" thank you for logging")
else:
    print("we need to find some users.")
    
current_users=["jack","wang","robot","li","mole"]
new_users=["zhao","mile","JACK","robot"]
for new_user in new_users:
    if new_user.lower() in current_users:
        print("the name "+new_user+" is current occpuied")
    else:
        print("welcome to github!")
print("
")
nums = [1,2,3,4,5,6,7,8,9]
for num  in nums:
    if num == 1:
        print("1st")
    elif num == 2:
        print("2nd")
    elif num == 3:
        print("3rd")
    else:
        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