擅长:python、mysql、java
<p>最好在代码中使用if-elif-else结构来处理3种不同的预期条件</p>
<p>您还需要将<code>if item in item:</code>更改为<code>if item in shoppingListVar:</code></p>
<pre><code>shoppingListVar = []
while True:
item = input("Enter your Item to the List: ")
if item in shoppingListVar:
print("you already got this item in the list")
elif item == "end":
break
else:
shoppingListVar.append(item)
print ("The following elements are in your shopping list:")
print (shoppingListVar)
</code></pre>