import urllib.request
import time
def get_price():
    page = urllib.request.urlopen("http://beans-r-us.appspot.com/prices-loyalty.html")
    text = page.read().decode("utf8")
    where = text.find(">$")
    start_of_price = where + 2
    end_of_price = start_of_price + 4
    price = text[start_of_price:end_of_price]
    return(price)
def cheap_price():
    while float(price) > 4.74:
        time.sleep(1)
        price = get_price()
    print("$" + price)
    print("buy!")
    custom_setting = "End"
    return(custom_setting)
custom_setting = input("Do you want custom setting?(Y/N)")
while custom_setting == "Y" :
    custom_setting = input("Do you want price now?(Y/N)")
    if custom_setting == "Y":
        price = get_price()
        print("$" + price)
    else:
        cheap_price()
        custom_setting = cheap_price()
while custom_setting == "N" :
    cheap_price()
    custom_setting = cheap_price()
print("Perfect End")

작동은하는데 에러는 안뜨는데 최종적으로 Perfect End나와야는데 안뜨네요.
게다가 N분기로가면
가격도 두번나오고 한번나와야되는데 여러번나오는데 custom_setting = "End"로 함수에서 변수로 return이 지정되지도않고요.



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