嘿伙計(jì)們可以幫助這個(gè)循環(huán)它進(jìn)入第一個(gè)如果并且卡住感謝你的幫助Options = int(input('Enter an Options :'))while Options != 0: if Options == 1: item = input('enter the item : ') qnty = int(input('Enter the Quantitiy for the item : ')) Shoping_list[item] = qnty elif Options == 2: for item in Shoping_list: print(item, ':', Shoping_list[item]) item = input('Enter the item you want to Remove : ') del(Shoping_list[item]) elif Options == 3: for item in Shoping_list: print(item, ':', Shoping_list[item]) elif Options != 0: print('you didnt enter a valid number ')else: print('shopping list is close')
4 回答
慕蓋茨4494581
TA貢獻(xiàn)1850條經(jīng)驗(yàn) 獲得超11個(gè)贊
您的代碼有點(diǎn)難以閱讀且難以維護(hù)我建議，當(dāng)您想退出時(shí)將“while 循環(huán)”更改為無(wú)限循環(huán)，只需打破循環(huán)，我更喜歡在詢問(wèn)選項(xiàng)之前顯示菜單。
您可以像這樣更改代碼：
def display_menu():
print("1. Add a new item to shopping list")
print("2. Remove an item")
print("3. Print Shopping List Items")
print("0. Exit")
return int(input('Enter an Options (0~3):'))
while True:
option = display_menu()
if option == 1:
item = input('enter the item : ')
qnty = int(input('Enter the Quantitiy for the item : '))
Shoping_list[item] = qnty
elif option == 2:
for item in Shoping_list:
print(item, ':', Shoping_list[item])
item = input('Enter the item you want to Remove : ')
del(Shoping_list[item])
elif option == 3:
for item in Shoping_list:
print(item, ':', Shoping_list[item])
elif option == 0:
print('shopping list is close')
break # Exit menu
else:
print('you didnt enter a valid number ')
慕妹3242003
TA貢獻(xiàn)1824條經(jīng)驗(yàn) 獲得超6個(gè)贊
太棒了，非常感謝你們！我是 python 的新手，這個(gè)信息非常有幫助
def display_menu():
print("1. Add a new item to shopping list")
print("2. Remove an item")
print("3. Print Shopping List Items")
print("0. Exit")
return int(input('Enter an Options (0~3):'))
while True:
option = display_menu()
if option == 1:
item = input('enter the item : ')
qnty = int(input('Enter the Quantitiy for the item : '))
Shoping_list[item] = qnty
elif option == 2:
for item in Shoping_list:
print(item, ':', Shoping_list[item])
item = input('Enter the item you want to Remove : ')
del(Shoping_list[item])
elif option == 3:
for item in Shoping_list:
print(item, ':', Shoping_list[item])
elif option == 0:
print('shopping list is close')
break # Exit menu
else:
print('you didnt enter a valid number ')
Ps喜歡帶有您可以調(diào)用的功能的選項(xiàng)
肥皂起泡泡
TA貢獻(xiàn)1829條經(jīng)驗(yàn) 獲得超6個(gè)贊
在每個(gè) if 語(yǔ)句中，在末尾插入 Options = 0。由于您的 while 循環(huán)取決于不為 0 的選項(xiàng)。將其重置為 0 允許用戶選擇另一個(gè)選項(xiàng)。
while Options != 0:
if Options == 1:
item = input('enter the item : ')
qnty = int(input('Enter the Quantitiy for the item : '))
Shoping_list[item] = qnty
Options = 0
另外，作為提示，請(qǐng)確保您的拼寫(xiě)和語(yǔ)法準(zhǔn)確無(wú)誤，并且間距保持一致。它使其他人更容易閱讀您的代碼。
這是正確的 if 循環(huán)的工作示例。用戶可以用 if 循環(huán)修改字典，并且可以一個(gè)接一個(gè)地運(yùn)行它們。
Shoping_list = {}
while True:
Options = int(input('Enter an Options :'))
while Options != 0:
if Options == 1:
item = input('enter the item : ')
qnty = int(input('Enter the Quantitiy for the item : '))
Shoping_list[item] = qnty
Options = 0
elif Options == 2:
for item in Shoping_list:
print(item, ':', Shoping_list[item])
item = input('Enter the item you want to Remove : ')
del(Shoping_list[item])
Options = 0
elif Options == 3:
for item in Shoping_list:
print(item, ':', Shoping_list[item])
Options = 0
elif Options != 0:
print('you didnt enter a valid number ')
else:
print('shopping list is close')
人到中年有點(diǎn)甜
TA貢獻(xiàn)1895條經(jīng)驗(yàn) 獲得超7個(gè)贊
Options = int(input('Enter an option'))在 while 循環(huán)中插入第一條語(yǔ)句。
while options!=0:
Options = int(input('Enter an option'))
.
.
.
.
- 4 回答
- 0 關(guān)注
- 126 瀏覽
添加回答
舉報(bào)
0/150
提交
取消