if語句中的if語句

Question

這是有點我的功課，我堅持讓代碼成爲後續問題，就像這裏的代碼一樣，我試過在if語句之後插入if語句，但它給了我一個意想不到的出現錯誤。

這裏是我的代碼至今：

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

你有一個額外的縮進。只需刪除額外的縮進級別：

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

縮進是在Python中創建代碼塊的方式。你的錯誤確切地說明你做錯了什麼。

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 

您縮進了if internalCondition:，有多餘的空格。