小项目: low版本的 员工信息程序:

 ### 附加两个文件1  user_info 和worker_info

　　 flag = False
  2 def logon(): #登录函数
  3     global flag
  4     usr = input('Username:').strip()
  5     pwd = input('Password:').strip()
  6     with open('user_info',encoding= 'utf-8') as f:
  7         for line in f.readlines():
  8             if usr+'\t'+pwd == line.strip():
  9                 print('登录成功')
 10                 flag = True
 11                 return
 12         else:
 13             print('输入错误')
 14
 15
 16 def id_find():  # 支持输入ID 准确查找
 17     find_id = input('请输入您要查找的员工信息的ID: ')
 18     print('ID, Name, Age, Phone, Job:')
 19     with open('worker_info','r+',encoding='utf-8') as f:
 20         f.seek(0)
 21         lines = f.readlines()
 22         print(lines[int(find_id)-1])
 23
 24
 25 def age_find():# 支持输入两个age 来找范围里面的 信息
 26     find_age_1 = input('请输入您要查找的大于某某年龄段的数字:')
 27     find_age_2 = input('请输入您要查找的小于某某年龄段的数字:')
 28     print('ID, Name, Age, Phone, Job:')
 29     with open('worker_info','r+',encoding='utf-8') as f:
 30         f.seek(0)
 31         for line in f.readlines():
 32             lis = line.strip().split(',')
 33             if int(lis[2]) > int(find_age_1) and int(lis[2]) < int(find_age_2):
 34                 print(line)
 35
 36
 37 def kwargs_find():# 支持关键字模糊查找
 38     find_kwargs = input('请输入您的关键字:')
 39     print('ID, Name, Age, Phone, Job:')
 40     with open('worker_info','r+',encoding='utf-8') as f:
 41         for line in f.readlines():
 42             if find_kwargs in line:
 43                 print(line)
 44
 45
 46 def warpper(fu):# 认证
 47     def inner():
 48         if flag == False:
 49             print('请先登录')
 50             logon()
 51         ret = fu()
 52         return ret
 53     return inner
 54
 55
 56 @warpper
 57 def find_worker():  # 查找函数
 58     print('1, ID查找 \n2, 年龄段查找 \n3, 关键字模糊查找 \n4, 查看全部信息')
 59     find_id = input('请输入您选择的查找方法:').strip()
 60     if find_id == '1':
 61         id_find()
 62     elif find_id == '2':
 63         age_find()
 64     elif find_id == '3':
 65         kwargs_find()
 66     elif find_id == '4':
 67         print('下面是所有员工信息:')
 68         print('ID, Name, Age, Phone, Job:')
 69         with open('worker_info','r+',encoding='utf-8') as f:
 70             for i in f.readlines():
 71                 print(i)
 72
 73
 74 @warpper
 75 def append_info():# 添加新员工信息
 76     name = input('请输入新员工的名字:').strip()
 77     age = input('请输入新员工的年龄:').strip()
 78     phone = input('请输入新员工的电话:').strip()
 79     job = input('请输入新员工的工作:').strip()
 80     with open('worker_info', 'a+', encoding='utf-8') as f:
 81         f.seek(0)
 82         li_lines = f.readlines()
 83         f.seek(0,2)
 84         f.write(str(len(li_lines)+1)+',%s,%s,%s,%s\n' %(name,age,phone,job))
 85
 86
 87 @warpper
 88 def pop_info():#删除指定ID的员工信息
 89     pop_id = input('请输入您要删除的员工的ID: ')
 90     print('删除成功')
 91     with open('worker_info','r+',encoding='utf-8') as f:
 92         f.seek(0)
 93         lines = f.readlines()
 94         lines[int(pop_id)-1] ='该员工已经被删除\n'
 95         f.seek(0)
 96         for i in lines:
 97             f.write(i)
 98     return
 99
100
101 @warpper
102 def change_info():
103     change_id = input('请输入您要修改的员工信息的ID: ')
104     name = input('请输入新员工的名字:')
105     age = input('请输入新员工的年龄:')
106     phone = input('请输入新员工的电话:')
107     job = input('请输入新员工的工作:')
108     print('修改成功')
109     with open('worker_info','r+',encoding='utf-8') as f:
110         f.seek(0)
111         lines = f.readlines()
112         lines[int(change_id)-1] = '%s,%s,%s,%s,%s\n' %(change_id, name, age, phone, job)
113         f.seek(0)
114         for i in lines:
115             f.write(i)
116     return
117
118
119 def choise():
120     while 1:
121         print('员工信息操作:')
122         print('1, 登录\n2, 查找员工信息\n3, 添加新员工信息\n4, 删除员工信息\n5, 修改员工信息\n6, 退出程序')
123         choose = input('请输入您要操作的功能:').strip()
124         if choose == '1':
125             logon()
126         elif choose == '2':
127             find_worker()
128         elif choose == '3':
129             append_info()
130         elif choose == '4':
131             pop_info()
132         elif choose == '5':
133             change_info()
134         elif choose == '6':
135             return
136 choise()