if语句中的if语句

Question

这是有点我的功课，我坚持让代码成为后续问题，就像这里的代码一样，我试过在if语句之后插入if语句，但它给了我一个意想不到的出现错误。

这里是我的代码至今：

Choice = input("Hello! Do you want to buy or sell snakes? Please enter (b) or (s) :") 
if Choice == "b": 
    buySnake = input ("What snake do you want to buy? We are selling python, kingsnake, rattlesnake, deathadder, cobra, mamba, viper and gartersnake. Please choose one : ") 
     if buySnake == "python": 
      return (to be added) 
elif Choice == "s": 
    sellFsnakes(snakeList,name,amount) 
else: 
    print("Please try again.") 
    buyWsnakes(snakeList,name,amount) 

Answer 1

你有一个额外的缩进。只需删除额外的缩进级别：

Choice = input("Hello! Do you want to buy or sell snakes? Please enter (b) or (s) :") 
if Choice == "b": 
    buySnake = input ("What snake do you want to buy? We are selling python, kingsnake, rattlesnake, deathadder, cobra, mamba, viper and gartersnake. Please choose one : ") 
    if buySnake == "python": 
     return (to be added) 
elif Choice == "s": 
    sellFsnakes(snakeList,name,amount) 
else: 
    print("Please try again.") 
    buyWsnakes(snakeList,name,amount) 

Answer 2

缩进是在Python中创建代码块的方式。你的错误确切地说明你做错了什么。

if condition: 
    # executes if condition is met 
    if internalCondition: 
     # executes if both condition and internalCondition is met 
elif otherCondition: 
    # executes if first statement didn't and otherCondition is met 
else: 
    # executes if nothing else executed 

您缩进了if internalCondition:，有多余的空格。