<p>您正在调用<code>select_svc1=select_svc1.lower()</code>,然后将其与具有大写字符的字符串进行比较,这样它当然不会做任何事情。要解决这个问题,只需删除所有<code>lower()</code>调用</p>
<pre><code>print("Zooey's (College Fund) Car Shop Services, \nOil change $35 \nTire rotation $19 \nCar wash $7 \nCar wax $1 ")
select_svc1 = input("select first service : ")
select_svc2 = input("select second service : ")
if(select_svc1=="-"):
select_svc1="No service"
if(select_svc1 == "Oil change"):
select_svc1=select_svc1+", $35"
elif(select_svc1 == "Tire rotation"):
select_svc1=select_svc1+", $19"
elif(select_svc1 == "Car wash"):
select_svc1=select_svc1+", $7"
elif(select_svc1 == "Car wax"):
select_svc1=select_svc1+", $12"
if(select_svc2=="-"):
select_svc2="No service"
if(select_svc2 == "Oil change"):
select_svc2=select_svc2+", $35"
elif(select_svc2 == "Tire rotation"):
select_svc2=select_svc2+", $19"
elif(select_svc2 == "Car wash"):
select_svc2=select_svc2+", $7"
elif(select_svc2 == "Car wax"):
select_svc2=select_svc2+", $12"
print ("\Zooey's (College Fund) Car Shop Services invoice")
print("first service : "+select_svc1)
print("second service : "+select_svc2)
</code></pre>
<p>输出:</p>
<pre><code>Zooey's (College Fund) Car Shop Services,
Oil change $35
Tire rotation $19
Car wash $7
Car wax $1
select first service : Oil change
select second service : Car wash
\Zooey's (College Fund) Car Shop Services invoice
first service : Oil change, $35
second service : Car wash, $7
</code></pre>