擅长:python、mysql、java
<p>试试这个:</p>
<pre><code>a = {}
all_item_cost_b=[]
all_item_cost_m=[]
all_item_cost_t=[]
all_item_cost_d=[]
all_item_cost_c=[]
n = 4
while n > 0:
item_type = input("enter the item type-b,m,t,d,c:")
item_cost = input("enter the item cost:")
if item_type == "b":
all_item_cost_b.append(item_cost)
a[item_type] = all_item_cost_b
elif item_type == "m":
all_item_cost_m.append(item_cost)
a[item_type] = all_item_cost_m
elif item_type == "t":
all_item_cost_t.append(item_cost)
a[item_type] = all_item_cost_t
elif item_type == "d":
all_item_cost_d.append(item_cost)
a[item_type] = all_item_cost_d
elif item_type == "c":
all_item_cost_c.append(item_cost)
a[item_type] = all_item_cost_c
else:
print("Sorry please enter a valid type")
n = n - 1
print(a)
</code></pre>
<p>给我们一个反馈。如果这能解决你的问题,别忘了标记为已回答。
干杯。你知道吗</p>