每天分享几个python项目 —— food ordering system

print("\n" * 5) import datetime import os list_foods = [] list_drinks = [] list_services = [] list_item_price = [0] * 100 var_discount_1 = 200 var_discount_2 = 1000 var_discount_3 = 5000 var_discount_1_rate = 0.05 var_discount_2_rate = 0.10 var_discount_3_rate = 0.15 navigator_symbol = "/" if os.name == "nt": navigator_symbol = "\\" def def_default(): global list_drinks, list_foods, list_services, list_item_order, list_item_price list_item_order = [0] * 100 def_default() def def_main(): while True: print("*" * 28 + "FOOD ORDERING SYSTEM" + "*" * 24 + "\n") print("*" * 31 + "MAIN MENU" + "*" * 32 + "\n" "\t(O) ORDER\n" "\t(R) REPORT\n" "\t(P) PAYMENT\n" "\t(E) EXIT\n" + "_" * 72) input_1 = str(input("Please Select Your Operation: ")).upper() if (len(input_1) == 1): if (input_1 == 'O'): print("\n" * 10) def_order_menu() break elif (input_1 == 'R'): print("\n" * 10) def_report() break elif (input_1 == 'P'): print("\n" * 10) def_payment() break elif (input_1 == 'E'): print("*" * 32 + "THANK YOU" + "*" * 31 + "\n") break else: print("\n" * 10 + "ERROR: Invalid Input (" + str(input_1) + "). Try again!") else: print("\n" * 10 + "ERROR: Invalid Input (" + str(input_1) + "). Try again!") def def_order_menu(): while True: print("*" * 31 + "ORDER PAGE" + "*" * 31 + "\n" "\t(F) FOODS AND DRINKS\n" "\t(O) OTHER SERVICES\n" "\t(M) MAIN MENU\n" "\t(E) EXIT\n" + "_" * 72) input_1 = str(input("Please Select Your Operation: ")).upper() if len(input_1) == 1: if (input_1 == 'F'): print("\n" * 10) def_food_drink_order() break elif (input_1 == 'O'): print("\n" * 10) def_other_services() break elif (input_1 == 'M'): print("\n" * 10) def_main() break elif (input_1 == 'E'): print("*" * 32 + "THANK YOU" + "*" * 31 + "\n") break else: print("\n" * 10 + "ERROR: Invalid Input (" + str(input_1) + "). Try again!") else: print("\n" * 10 + "ERROR: Invalid Input (" + str(input_1) + "). Try again!") def def_full_file_reader(): file_foods = open('files'+navigator_symbol+'list_foods.fsd', 'r') for i in file_foods: list_foods.append(str(i.strip())) file_foods.close() file_drinks = open('files'+navigator_symbol+'list_drinks.fsd', 'r') for i in file_drinks: list_drinks.append(str(i.strip())) file_drinks.close() file_services = open('files'+navigator_symbol+'list_services.fsd', 'r') for i in file_services: list_services.append(str(i.strip())) file_services.close() i = 0 while i <= (len(list_foods) - 1): if '$' in list_foods[i]: list_foods[i] = str(list_foods[i][:list_foods[i].index('$') - 1]) + ' ' * (20 - (list_foods[i].index('$') - 1)) + str(list_foods[i][list_foods[i].index('$'):]) i += 1 i = 0 while i <= (len(list_drinks) - 1): if '$' in list_drinks[i]: list_drinks[i] = str(list_drinks[i][:list_drinks[i].index('$') - 1]) + ' ' * (20 - (list_drinks[i].index('$') - 1)) + str(list_drinks[i][list_drinks[i].index('$'):]) i += 1 i = 0 while i <= (len(list_services) - 1): if '$' in list_services[i]: list_services[i] = str(list_services[i][:list_services[i].index('$') - 1]) + ' ' * (20 - (list_services[i].index('$') - 1)) + str(list_services[i][list_services[i].index('$'):]) i += 1 def_full_file_reader() def def_file_sorter(): global list_foods, list_drinks, list_services list_foods = sorted(list_foods) list_drinks = sorted(list_drinks) list_services = sorted(list_services) i = 0 while i < len(list_foods): list_item_price[i] = float(list_foods[i][int(list_foods[i].index("$") + 2):]) i += 1 i = 0 while i < len(list_drinks): list_item_price[40 + i] = float(list_drinks[i][int(list_drinks[i].index("$") + 2):]) i += 1 i = 0 while i < len(list_services): list_item_price[80 + i] = float(list_services[i][int(list_services[i].index("$") + 2):]) i += 1 def_file_sorter() def def_food_drink_order(): while True: print("*" * 26 + "ORDER FOODS & DRINKS" + "*" * 26) print(" |NO| |FOOD NAME| |PRICE| | |NO| |DRINK NAME| |PRICE|") i = 0 while i < len(list_foods) or i < len(list_drinks): var_space = 1 if i <= 8: var_space = 2 if i < len(list_foods): food = " (" + str(i + 1) + ")" + " " * var_space + str(list_foods[i]) + " | " else: food = " " * 36 + "| " if i < len(list_drinks): drink = "(" + str(41 + i) + ")" + " " + str(list_drinks[i]) else: drink = "" print(food, drink) i += 1 print("\n (M) MAIN MENU (P) PAYMENT (E) EXIT\n" + "_" * 72) input_1 = input("Please Select Your Operation: ").upper() if (input_1 == 'M'): print("\n" * 10) def_main() break if (input_1 == 'E'): print("*" * 32 + "THANK YOU" + "*" * 31 + "\n") break if (input_1 == 'P'): print("\n" * 10) def_payment() break try: int(input_1) if ((int(input_1) <= len(list_foods) and int(input_1) > 0) or (int(input_1) <= len(list_drinks) + 40 and int(input_1) > 40)): try: print("\n" + "_" * 72 + "\n" + str(list_foods[int(input_1) - 1])) except: pass try: