1.程序文件：info_management.py user_info

2.程序文件说明：info_management.py-主程序    user_info-存放员工数据

3.python版本：python-3.5.3

4.程序使用：将info_management.py和user_info放到同一目录下，执行python info_management.py

5.程序解析：

    【0.增加员工信息】此处以名字name作为主键 增加输入格式，以-隔开:名字-年龄-电话-职位    （直接对文件的操作）

    【1.删除员工信息】直接输入员工的id即可删除 （直接对文件的操作）

    【2.修改员工信息】输入员工名字，修改原内容，新内容 格式：员工名字 修改原内容 新内容        （直接对文件的操作）

    【3.查询员工信息】使用动态代码对字典格式实现多种操作查询    （字典，exec）

    【4.退出员工系统】

6.程序执行结果：请亲自动手执行或者查看我的博客

7.程序博客地址：http://www.cnblogs.com/chenjw-note/p/7866737.html

#!/usr/bin/env python

# _*_ coding: utf-8 _*_

# author：chenjianwen

# email：1071179133@qq.com

import json,time,re,os

user_info = {}

print_out = 'print(user_info[name]["id"],user_info[name]["name"],user_info[name]["age"],user_info[name]["phone"],user_info[name]["dept"],user_info[name]["enroll_date"])'

count = 0

##读取文件，把用户信息生成字典格式

def read_file_to_info():

    with open('user_info','r') as f_r:

        for line in f_r:

            line = line.rstrip('\n')    ##去除空行

            if line:

                line = line.strip()

                id = line.split(' ')[0]

                name = line.split(' ')[1]

                age = line.split(' ')[2]

                phone = line.split(' ')[3]

                dept = line.split(' ')[4]

                enroll_date = line.split(' ')[5]

                #global user_info

                user_info[name] = {

                        'id':'%s'%id,

                        'name':'%s'%name,

                        'age':'%s'%age,

                        'phone':'%s'%phone,

                        'dept':'%s'%dept,

                        'enroll_date':'%s'%enroll_date

                        }

##写入文件函数

def write_file(*args,**kwargs):

    with open('user_info', 'a+') as f_w:

        f_w.write(*args,**kwargs)

##查询函数1

def select_info_number(key,parallel,number):

    cmd = 'if int(user_info[name]["%s"]) %s %s:%s;global count;count = count + 1'%(key,parallel,number,print_out)

    start_time = time.time()

    for name in user_info:

        exec(cmd)

    end_time = time.time()

    use_time = end_time - start_time

    print("%s row in set (%s sec)"%(count,use_time))

    return True

##查询函数2

def select_info_message(message,parallel,key):

    cmd = 'if "%s" %s user_info[name]["%s"]:%s;global count;count = count + 1'%(message,parallel,key,print_out)

    start_time = time.time()

    for name in user_info:

        exec(cmd)

    end_time = time.time()

    use_time = end_time - start_time

    print("%s row in set (%s sec)" %(count,use_time))

    return True

##增加函数

def add_person_info():

    #print(user_info)

    id = len(user_info) + 1

    print("此处以名字name作为主键")

    pinfo = input("输入员工:名字-年龄-电话-职位：")

    name, age, phone, dept = pinfo.split('-')[0],pinfo.split('-')[1],pinfo.split('-')[2],pinfo.split('-')[3]

    enroll_date = time.strftime("%Y-%m-%d")

    if name in user_info:

        print("该员工已存在..")

        exit()

    else:

        data = '\n%s %s %s %s %s %s'%(id,name,age,phone,dept,enroll_date)

        write_file(data)

    read_file_to_info()

    return True

##删除函数

def del_person_info():

    id = input("请输入删除的员工id:")

    f_r = open('user_info', mode='r', encoding='utf-8')

    f_w = open('user_info1', mode='w+', encoding='utf-8')

    for line in f_r:

        line = line.strip()

        if line.split(' ')[0] == id:

            pass

        else:

            f_w.write(line + '\n')

    f_r.close()

    f_w.close()

    os.remove('user_info')

    os.rename('user_info1', 'user_info')

    read_file_to_info()

    return True

##修改函数

def replace_person_info():

    message = input("请输入：员工名字 修改原内容 新内容：")

    name = message.split(' ')[0]

    old_dept = message.split(' ')[1]

    new_dept = message.split(' ')[2]

    f_r = open('user_info',mode='r',encoding='utf-8')

    f_w = open('user_info1', mode='w+', encoding='utf-8')

    for line in f_r:

        line = line.strip()

        if name in line:

            line = line.replace(old_dept,new_dept)

        f_w.write(line + '\n')

    f_r.close()

    f_w.close()

    os.remove('user_info')

    os.rename('user_info1', 'user_info')

    read_file_to_info()

    return True

if __name__ == '__main__':

    while True:

        read_file_to_info()

        ops = ['增加员工信息','删除员工信息','修改员工信息','查询员工信息','退出员工系统']

        for key,i in enumerate(ops):

            print("【%s.%s】"%(key,i),end='   ')

        print()

        ops_key = int(input("请输入你需要的操作序号："))

        if ops_key == 0:

            if add_person_info():

                print("执行成功！")

                continue

            else:

                print('执行失败！')

                continue

        elif ops_key == 1:

            if del_person_info():

                print("执行成功！")

                continue

            else:

                print('执行失败！')

                continue

        elif ops_key == 2:

            if replace_person_info():

                print("执行成功！")

                continue

            else:

                print('执行失败！')

                continue

        elif ops_key == 3:

            print("请输入你的查询语句：【格式：key action(>,<,==,in) 值,例如：age > 22 或 phone in 1365】：")

            print("目前可使用的key有：name,enroll_date,age,id,phone,dept")

            select_message = input("请输入你的查询语句：")

            key = select_message.split(' ')[0]

            parallel = select_message.split(' ')[1]

            message = select_message.split(' ')[2]

            if parallel == '==':

                if select_info_message(message, parallel, key):
　　　　　　　　　　　　count = 0

                    print("执行成功！")

                    continue

                else:

                    print('执行失败！')

                    continue

            elif not re.findall('[a-zA-Z]+',parallel):

                if select_info_number(key, parallel, message):
　　　　　　　　　　　　count = 0

                    print("执行成功！")

                    continue

                else:

                    print('执行失败！')

                    continue

            else:

                if select_info_message(message, parallel, key):
　　　　　　　　　　　　count = 0

                    print("执行成功！")

                    continue

                else:

                    print('执行失败！')

                    continue

        elif ops_key == 4:

            print("退出系统成功！")

            exit()

        else:

            print("你的输入有误，请重新输入...")

1 admin 22 136510 IT 2017-04-01

2 jiwn1 23 136510 op 2017-04-01

3 jiwn2 23 188250 ops 2017-11-20

4 jiwn3 23 188250 ops 2017-11-20

5 jiwn4 23 188250 IIIIIIIIITTTTTTTTT 2017-11-20

6 jiwn5 24 188250 OPS 2017-11-20

7 jiwn6 25 188262 OPS 2017-11-20

8 chenjianwen01 22 188262 IT 2017-11-20