高階程式設計技術（Python）作業7

書上寫了sublime無法執行使用者互動的**，事實上只要安裝乙個repl就可以進行使用者互動了。但是repl並沒有辦法進行死迴圈的跳出處理，所以一旦**出現死迴圈，sublime就會失去響應，只能關閉sublime。而不使用repl正常執行python就可以使用ctrl + c中斷死迴圈但是又不能進行使用者互動。因此如果要用sublime編寫大規模的**並執行，最好還是在cmd的環境下執行。

7-8 熟食店：建立乙個名為sandwich_orders的列表，在其中包含各種三明治的名字；再建立乙個名為finished_sandwiches的空列表。遍歷列表sandwich_orders，對於其中的每種三明治，都列印一條訊息，如i made your tuna sandwich，並將其移到列finished_sandwiches。所有三明治都製作好後，列印一條訊息，將這些三明治列出來。

solution：

sandwich_orders = ["hotdog", "salad", "tuna"]
finished_sandwiches = 
while(sandwich_orders):
sandwich = sandwich_orders.pop()
print("i made your " + sandwich +" sandwich.")
print("\nthese are sandwiches finished.")
for finished_sandwich in finished_sandwiches:
print("\t" + finished_sandwich.title() + " sandwich")

output：

i made your tuna sandwich. i made your salad sandwich. i made your hotdog sandwich. these are sandwiches finished. tuna sandwich salad sandwich

hotdog sandwich

7-9 五香菸薰牛肉（pastrami）賣完了：使用為完成練習7-8而建立的列表sandwich_orders，並確保』pastrami』在其中至少出現了三次。在程式開頭附近新增這樣的**：列印一條訊息，指出熟食店的五香菸薰牛肉賣完了；再使用乙個while 迴圈將列表sandwich_orders中的』pastrami』都刪除。確認最終的列表finished_sandwiches 中不包含』pastrami』。

solution：

sandwich_orders = ["hotdog", "pastrami", "salad", 
"pastrami", "tuna", "pastrami"]
finished_sandwiches = 
print("all the pastrami is sold out!\n")
while
"pastrami"
in sandwich_orders:
sandwich_orders.remove("pastrami")
while(sandwich_orders):
sandwich = sandwich_orders.pop()
print("i made your " + sandwich +" sandwich.")
print("\nthese are sandwiches finished.")
for finished_sandwich in finished_sandwiches:
print("\t" + finished_sandwich.title() + " sandwich")
if"pastrami"
in finished_sandwiches:
print("\nthere must be something wrong.")
else:
print("\nthere are no pastrami sandwiches.")

output：

all the pastrami is sold out! i made your tuna sandwich. i made your salad sandwich. i made your hotdog sandwich. these are sandwiches finished. tuna sandwich salad sandwich hotdog sandwich

there are no pastrami sandwiches.

7-10 夢想的度假勝地：編寫乙個程式，調查使用者夢想的度假勝地。使用類似於「if you could visit one place in the world, where would you go?」的提示，並編寫乙個列印調查結果的**塊。

solution:

polling_active = true
responses = {}
while polling_active:
name = input("what is your name? ")
sentence = "if you could visit one place in the world,"
sentence += "\nwhere would you go ? "
place = input(sentence)
responses[name] = place
while
true:
repeat = input("finished? y/n\n")
if (repeat == "y"):
polling_active = false
break
elif(repeat == "n"):
print("next one.\n")
break
else:
print("wrong input. please input again.\n")
print("this is the result.")
for name, place in responses.items():
print(name.title() + " would like to " + place.title() + ".")

output:

if you could visit one place in

the world,

where would you go ? tokyo

finished? y/n

nnext one.

what is your name? ashero

if you could visit one place in

the world,

where would you go ? paris

finished? y/n

djdwrong input. please input again.

finished? y/n

ythis is

theresult.

tim would like to tokyo.

ashero would like to paris.

注：書上的例項沒有判斷使用者如果亂輸入的情況，實際問題中應該考慮這個問題。flag active的主要用途就是用來處理迴圈中套迴圈的跳出判斷

高階程式設計技術（Python）作業7

高階程式設計技術作業 7

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高階程式設計技術（Python）作業7

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