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HomeBackend DevelopmentPython TutorialPython implements command line address book

1. To achieve the goal

Write a command line address book program that can add, query, and delete address book friends and phone numbers

2. Implementation method

#Create a class to represent a person’s information. Use a dictionary to store each person's object, with the name as the key.
Use the pickle module to store these objects permanently.
Use the dictionary's built-in methods to add, delete, and modify personnel information.

3. Mind map

Python implements command line address book

## 4. Write pseudo code

##
# 1.创建字典用来存储通讯录信息
# 2.创建人员类,包含姓名、关系、电话三个属性
# 3.创建操作类,包含增加、查询、删除人员,退出,保存并退出五个方法
# 4.程序运行
# 5.判断通讯录文件是否存在
# 6.如果存在,将文件读取到personDictionary字典中
# 7.如果不存在,提示并创建
# 8.while循环等待读取指令
  # 9.如果指令为addperson,添加通讯录人员
  # 10.如果指令为delperson,删除通讯录人员
  # 11.如果指令为search,查找通讯录人员
  # 12.如果指令为quit,不保存退出程序
  # 13.如果指令为sq,保存更改并退出程序

5. Write code based on pseudo code

import pickle as p
import os

# 1.创建字典用来存储通讯录信息
personDictionary= {'name':{'relationship':'','tel':''}}
relationshipList=['家人','朋友','同事']

# 2.创建人员类,包含姓名、关系、电话三个属性
class Person:
  def __init__(self,name,relationship= relationshipList[1],tel='None'):
    personDictionary[name]= {'relationship':relationship,'tel':tel}
# 3.创建操作类,包含增加、查询、删除人员,退出,保存并退出五个方法
class Operation:
  def Addperson():
    addname= input('请输入姓名:')
    addrelationship= int(input('请选择分组(0:家人,1:朋友,2:同事):'))
    addtel= input('请输入电话:')
    Person(addname,relationshipList[addrelationship],addtel)
  def Delperson():
    name= input('请输入要删除的联系人姓名:')
    del personDictionary[name]
  def Search():
    name= input('请输入要查找的联系人的姓名:')
    if name in personDictionary:
      print('姓名:%s,关系:%s,电话:%s' %(name,personDictionary[name]['relationship'],personDictionary[name]['tel']))
    else:
      print('联系人不存在。')
  def Quit():
    running= False
  def SaveQuit():
    f= open(addressbookFile,'wb')
    p.dump(personDictionary,f)
    f.close()
    running= False
# 4.程序运行
running= True
# 5.判断通讯录文件是否存在
addressbookFile= 'addressbook.data'
# 6.如果存在,将文件读取到personDictionary字典中
if os.path.exists(addressbookFile):
  f= open(addressbookFile,'rb')  
  personDictionary= p.load(f)
# 7.如果不存在,提示并创建
else:
  jCommand= input('未找到通讯录文件,是否创建?yes/no ')
  if jCommand== 'yes':
    f= open(addressbookFile,'wb')
    p.dump(personDictionary,f)
    f.close()
  elif jCommand== 'no':
    running= False
# 8.while循环等待读取指令
while running:
  command= input('请输入指令:')
  # 9.如果指令为addperson,添加通讯录人员
  if command== 'addperson':
    Operation.Addperson()
    continue
  # 10.如果指令为delperson,删除通讯录人员
  elif command== 'delperson':
    Operation.Delperson()
    continue
  # 11.如果指令为search,查找通讯录人员
  elif command== 'search':
    Operation.Search()
    continue
  # 12.如果指令为quit,不保存退出程序
  elif command== 'quit':
    Operation.Quit()
    break
  # 13.如果指令为sq,保存更改并退出程序
  elif command== 'sq':
    Operation.SaveQuit()
    break
  else:
    print('未找到指令!')
    continue

6. Demonstration

Python3 addressbook.py 
请输入指令:search
请输入要查找的联系人的姓名:zhangsan
联系人不存在。
请输入指令:addperson
请输入姓名:zhangsan
请选择分组(0:家人,1:朋友,2:同事):1
请输入电话:1234567
请输入指令:search
请输入要查找的联系人的姓名:zhangsan
姓名:zhangsan,关系:朋友,电话:1234567
请输入指令:sq
$ Python3 addressbook.py 
请输入指令:search
请输入要查找的联系人的姓名:zhangsan
姓名:zhangsan,关系:朋友,电话:1234567
请输入指令:addperson
请输入姓名:lisi
请选择分组(0:家人,1:朋友,2:同事):1
请输入电话:1234567
请输入指令:q
未找到指令!
请输入指令:quit
$ Python3 addressbook.py 
请输入指令:search
请输入要查找的联系人的姓名:lisi
联系人不存在。
请输入指令:search
请输入要查找的联系人的姓名:zhangsan
姓名:zhangsan,关系:朋友,电话:1234567
请输入指令:quit

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