擅长:python、mysql、java
<p>您只是忘了用新索引更新您的锅包:</p>
<pre><code>#list of sauce packs
saucePacks = ['sauce_pack1', 'sauce_pack2', 'sauce_pack3', 'sauce_pack4']
index = 0
saucePack = saucePacks[index]
#list of pizzas
pizzas = ['pizza1', 'pizza2', 'pizza3_sauce_error', 'pizza4', 'pizza5']
#iterating over strings
for pizza in pizzas:
if 'sauce_error' in pizza:
index = index+1 #need to switch sauce pack if substring in string
saucePack = saucePacks[index]
print(saucePack, pizza)
else:
print(saucePack, pizza)
</code></pre>