Python實(shí)現(xiàn)的購物車功能示例
本文實(shí)例講述了Python實(shí)現(xiàn)的購物車功能。分享給大家供大家參考,具體如下:
這里嘗試用python實(shí)現(xiàn)簡單的購物車程序。。。
基本要求:
用戶輸入工資,然后打印購物菜單
用戶可以不斷的購買商品,直到余額不夠?yàn)橹?br />
退出時(shí)打印用戶已購買的商品和剩余金額。。。
代碼:
#!/usr/env python #coding:utf-8 import re,math def get_customer_salary(): while True: salary=raw_input('Please input your monthly salary(a positive integer):') if __is_valid_num(salary): return int(salary) else: print '[warn] Please input a valid number!' def __is_valid_num(num): p=re.compile(r'^\d+$') m=p.match(num) if m: return True else: return False def get_customer_selection(): while True: selection=raw_input('Please enter the goods number you want to buy:') if __is_valid_num(selection): if __is_a_valid_selection(int(selection)): return int(selection) else: print '[warn] Please enter a valid selection number' else: print '[warn] Please enter a valid number!\n' def __is_a_valid_selection(selection): if 1<=selection<=get_total_amount_of_products(): return True else: return False def get_products_list(): return {'Flower':50,'Perfume':300,'Shoes':600,'Clothing':800,'Alcohol':300, 'Makeup':800,'Bike':1500,'Car':200000,'Apartment':5000000} def get_total_amount_of_products(): return len(get_products_list()) def mapping_type_code_for_products(): return ['Flower','Perfume','Shoes','Clothing','Alcohol','Makeup','Bike','Car','Apartment'] def get_product_price(type_code): return get_products_list()[get_product_name(type_code)] def get_product_name(type_code): return mapping_type_code_for_products()[type_code-1] def get_lowest_price_of_products(): price_list=[] for k,v in get_products_list().items(): price_list.append(v) return min(price_list) def get_highest_price_of_produces(): price_list=[] for k,v in get_products_list().items(): price_list.append(v) return max(price_list) def still_can_buy_something(left_money): if left_money<get_lowest_price_of_products(): return False else: return True def still_want_to_buy_something(): while True: answer=raw_input('Do you still want to buy something?(y/n):') result=is_a_valid_answer(answer) if result=='yes':return True if result=='no':return False print '[warn] Please enter [yes/no] or [y/n]!\n' def is_a_valid_answer(answer): yes_pattern=re.compile(r'^[Yy][Ee][Ss]$|^[Yy]$') no_pattern=re.compile(r'^[Nn][Oo]$|^[Nn]$') if yes_pattern.match(answer):return 'yes' if no_pattern.match(answer):return 'no' return False def show_shopping_list(): counter=1 for i in mapping_type_code_for_products(): print '''''(%d) %s: %s RMB''' % (counter,i+' '*(10-len(i)),str(get_products_list()[i])) counter+=1 def is_affordable(left_money,product_price): if left_money>=product_price: return True else: return False def time_needed_to_work_for_buying_products(salary,price): result=float(price)/salary return get_formatting_time(int(math.ceil(result))) def get_formatting_time(months): if months<12:return ('%d months' % months) years=months/12 months=months%12 return ('%d years,%d months' % (years,months)) #主程序從這里開始 if __name__=='__main__': salary=get_customer_salary() #獲取月工資 total_money=salary shopping_cart=[] #初始化購物車 while True: show_shopping_list() #打印購物列表 #判斷剩余資金是否能夠購買列表中的最低商品 if still_can_buy_something(total_money): selection=get_customer_selection() #獲取用戶需要購買的商品編號 product_price=get_product_price(selection)#獲取商品的價(jià)格 product_name=get_product_name(selection)#獲取商品的名稱 if total_money>=product_price: total_money-=product_price #打印購買成功信息 print 'Congratulations!You bought a %s successfully!\n' % product_name shopping_cart.append(product_name)#將商品加入購物車 print 'You still have %d RMB left\n' % total_money #打印剩余資金 #判斷是否還想購買其他商品 if not still_want_to_buy_something(): print 'Thank you for coming!' break else: #輸出還需要工作多久才能購買 format_time=time_needed_to_work_for_buying_products(salary,product_price-total_money) print 'Sorry,you can not afford this product!\n' print "You have to work '%s' to get it!\n" % format_time #判斷是否還想購買其他商品 if not still_want_to_buy_something():break else: print 'Your balance is not enough and can not continue to buy anything.' break #打印購物車列表 print 'Now,your balance is %d,and\nYou have buy %s' % (total_money,shopping_cart)
運(yùn)行效果:
更多關(guān)于Python相關(guān)內(nèi)容感興趣的讀者可查看本站專題:《Python數(shù)學(xué)運(yùn)算技巧總結(jié)》、《Python數(shù)據(jù)結(jié)構(gòu)與算法教程》、《Python函數(shù)使用技巧總結(jié)》、《Python字符串操作技巧匯總》、《Python入門與進(jìn)階經(jīng)典教程》及《Python文件與目錄操作技巧匯總》
希望本文所述對大家Python程序設(shè)計(jì)有所幫助。
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