Python-w2

　　一个购物车实例，大量的列表，字典，文件互相写入，读取操作。
　　对于嵌套字典的取值，比较繁琐。
　　该程序功能较为单一，代码了较大，没有使用函数，有很多地方可以改进。
　　#!/usr/bin/env python
　　# -*- coding: utf-8 -*-
　　import os,sys,time
　　# init menu prod list
　　_prod_list = []
　　# init a shopping cart
　　_shopping_his = []
　　_shopping_cart = []
　　# init user info list
　　_user = {}
　　# load prod list
　　if not os.path.exists("w2_prod.txt"):
　　open("w2_prod.txt", "w").close()
　　else:
　　with open("w2_prod.txt","r") as prod_list:
　　lines = prod_list.readlines()
　　if lines:
　　print("Load prod list...")
　　for line in lines:
　　_prod_list.append(line.strip())
　　else:
　　print("Nothing in prod list. Please import production with the format: prod_name,prod_price")
　　exit()
　　# create user list and buy list
　　if not os.path.exists("w2_user.txt"):
　　open("w2_user.txt","w").close()
　　if not os.path.exists("w2_buy.txt"):
　　open("w2_buy.txt","w").close()
　　# init user info
　　with open("w2_user.txt","r+") as names:
　　lines = names.readlines()
　　if lines:
　　print("Load user information...")
　　for i in range(len(lines)):
　　_user[str(i)] = {}
　　(_id,_uname,_upwd,_ustate,_ubalance) = lines.strip().split(",",5)
　　_user[str(i)]["name"] = _uname
　　_user[str(i)]["password"] = _upwd
　　_user[str(i)]["state"] = _ustate
　　_user[str(i)]["balance"] = int(_ubalance)
　　else:
　　print("It is empty")
　　print("Hello, it is your first time to access....")
　　print("Please enter your information:")
　　_name = input("Name:")
　　_pwd = input("Password:")
　　_state = 'enable'
　　_salary = int(input("Salary:"))
　　_uid = str(len(_user))
　　names.write("%s,%s,%s,%s,%d" %(_uid,_name,_pwd,_state,_salary))
　　#load user info
　　_user[_uid] = {}
　　_user[_uid]["name"] = _name
　　_user[_uid]["password"] = _pwd
　　_user[_uid]["state"] = _state
　　_user[_uid]["balance"] = _salary

　　#login system and user>　　print("Login".center(30,"="))
　　_name = input("Name:")
　　with open("w2_user.txt", "r") as users:
　　lines = users.readlines()
　　for i in range(len(lines)):
　　if _name == _user[str(i)]["name"]:
　　_pwd = input("password:")
　　if _pwd == _user[str(i)]["password"]:
　　print("Welcome to login !")
　　else:
　　print("The password is error...")
　　exit()
　　else:
　　print("The user is not exist.")
　　exit()
　　#load shopping cart
　　with open("w2_buy.txt","r") as buy_lists:
　　lines =  buy_lists.readlines()
　　if lines:
　　print("\033[1;37;44m Shopping_History \033[0m ".center(30,"="))
　　for i in lines:
　　_shopping_his.append(i.strip())
　　print("\033[1;37;44m",_shopping_his,"\033[0m")
　　else:
　　print("Nothing in shopping cart".center(40,"="))
　　#load balance
　　_balance = []
　　for i in _user.keys():
　　balance = int(_user["balance"])
　　_balance.append(balance)
　　print("\033[1;31m Balance:",_balance,"\033[0m")
　　balance = int(_balance[0])
　　while True:
　　# load prod list
　　print("The Production List".center(30,"="))
　　for index, menu_list in enumerate(_prod_list):
　　print(index, menu_list)
　　#user operation
　　_select1 = input("Your selection[History:h|Recharge:r|Quit:q]:")
　　if _select1.isdigit():
　　_select1 = int(_select1)
　　if _select1 > -1 and _select1 <= len(_prod_list):
　　(pname,pprice) = str(_prod_list[_select1]).strip().split(",")
　　pprice = int(pprice)
　　for i in _user.keys():
　　balance = _user[str(i)]["balance"]
　　print(balance)
　　print(pprice)
　　if balance >= pprice:
　　balance -= pprice
　　print("\033[1;34m Add %s to shopping cart. \033[0m" %pname)
　　_shopping_cart.append(pname)
　　print("\033[1;35m Shopping_Cart:",_shopping_cart,"\033[0m")
　　print("Shopping His:",_shopping_his)
　　print("\033[1;31m Balance RMB:",balance,"\033[0m")
　　for i in _user.keys():
　　_user["balance"] = balance
　　else:
　　print("\033[1;31m Balance is not enough.\033[0m")
　　continue
　　else:
　　print("\033[1;31m It is out of range! \033[0m")
　　elif _select1 == "q":
　　print("\033[1;35m Total:", _shopping_cart, "\033[0m")
　　print("Saving summary report of \033[1;31m w2_report.txt \033[0m ...")
　　for i in range(20):
　　sys.stdout.write("#")
　　sys.stdout.flush()
　　time.sleep(0.2)
　　#build report
　　shopping = _shopping_cart+_shopping_his
　　item = set(shopping)
　　with open("w2_report.txt","w") as report:
　　for i in item:
　　print(i,shopping.count(i),file=report)
　　#update user info
　　for i in _user.keys():
　　_quid = i
　　_qname = _user[str(i)]["name"]
　　_qpassword = _user[str(i)]["password"]
　　_qstate = _user[str(i)]["state"]
　　_qbalance = _user[str(i)]["balance"]
　　with open("w2_user.txt","w+") as names:
　　names.write("%s,%s,%s,%s,%d" %(_quid,_qname,_qpassword,_qstate,_qbalance) )
　　#store prod in file
　　with open("w2_buy.txt","a") as saves:
　　for i in _shopping_cart:
　　print(i,file=saves)
　　exit()
　　elif _select1 == "h":
　　print("\033[1;37;44m You had got items before:",_shopping_his,"\033[0m")
　　elif _select1 == "r":
　　_money = input("How much cash do you want to add:")
　　if _money.isdigit():
　　_money = int(_money)
　　for i in _user.keys():
　　_user[str(i)]["balance"] = int(_user[str(i)]["balance"]) + _money
　　print(_user[str(i)]["balance"])
　　break
　　else:
　　print("\033[1;31m It is not a digit! \033[0m")
　　continue
　　else:
　　print("\033[1;31m It is not a digit! \033[0m")