How to write a simple address book with Python

Directory write a simple address book with Python 1. Idea 1, define an empty list and an empty dictionary to store
2. Define function options 3. Add address book function 4. Loop and call all functions 2. Demonstration of the whole project

Write a simple address book with Python

STEP 1 Conceive

1. Define an empty list and an empty dictionary to store

list1=[]  # Used to store information in dictionaries 
dict1={}  # Used to store contact information 

2. Define functional options

def Menu():
    print(' Please select a function --------\n'
          '1. Add Student \n'
          '2. Delete Student \n'
          '3. Modify students \n'
          '4. Enquiry of Students \n'
          '5. Show all students \n'
          '6. Exit the system \n'
          '----------------')

3. Add address book function 3.1 Adding Students

# Add Student 
def Add():
    id=input(' Please enter your student number :')
    name=input(' Please enter a name :')
    tel=input(' Please enter your mobile phone number :')
    dict1={'id':id,'name':name,'tel':tel}
    list1.append(dict1)  # Add dictionary contents to the list 
    print(list1)

This completes the addition of students

3.2 Remove Student Feature

# Delete Student 
def Del():
    name=input(' Please enter the name of the student you want to delete :')
    i=0  # Index 
    for item in list1:  # Loop the contents of the list 
        i+=1
        if name in item['name']:  # When you determine that the name of the student to be deleted is the same as the nested dictionary name in the list 
            del list1[i-1]   # Delete list index -1 Content of 
            print(list1)
        else:
            print(' There is no such student ...')

3.3 Modifying Students

# Modify students 
def Update():
    name=input(' Please enter the name of the student you want to modify :')
    tel=input(' Please enter a new mobile phone number :')
    i=0  # Index 
    for item in list1:
        i+=1
        if name in item['name']:
            list1[i-1]['tel']=tel  # Modify the list index -1 Dictionary contents nested in, old tel Modify to a new mobile phone number 
            print(list1)
        else:
            print(' There is no such student ...')

3.4 Enquiry of Students

# Enquiry of Students 
def Select():
    name=input(' Please enter the name of the student you want to query :')
    for item in list1:
        if name in item['name']:
            print(' The student information found is as follows --------')
            print(' The student's student number is %s, The name is %s, The cell phone number is %s' % (item['id'],item['name'],item['tel']))
        else:
            print(' No such person was found ...')

3.5 Show All Students

# Show all students 
def ShowAll():
    print(' Student number   Name   Mobile phone number ')
    for item in list1:
        print(item['id'],item['name'],item['tel'])

3.6 Exiting the system

# Exit the system 
def Quit():
    YesNo=input(' Are you sure you want to quit ,yes or no?')
    if YesNo=='yes':
        quit()

4. Loop and call all function functions

while True:
    Menu()
    num=int(input(' Please enter the function serial number :'))
    if num==1:
        Add()
    elif num==2:
        Del()
    elif num==3:
        Update()
    elif num==4:
        Select()
    elif num==5:
        ShowAll()
    elif num==6:
        Quit()
    else:
        print(' Invalid option -----')

2. Overall project demonstration

 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :1
 Please enter your student number :001
 Please enter a name : Zhang 
 Please enter your mobile phone number :111
[{'id': '001', 'name': ' Zhang ', 'tel': '111'}]
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :1
 Please enter your student number :002
 Please enter a name : Li 
 Please enter your mobile phone number :222
[{'id': '001', 'name': ' Zhang ', 'tel': '111'}, {'id': '002', 'name': ' Li ', 'tel': '222'}]
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :1
 Please enter your student number :003
 Please enter a name : Wang 
 Please enter your mobile phone number :333
[{'id': '001', 'name': ' Zhang ', 'tel': '111'}, {'id': '002', 'name': ' Li ', 'tel': '222'}, {'id': '003', 'name': ' Wang ', 'tel': '333'}]
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :2
 Please enter the name of the student you want to delete : Zhang 
[{'id': '002', 'name': ' Li ', 'tel': '222'}, {'id': '003', 'name': ' Wang ', 'tel': '333'}]
 There is no such student ...
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :3
 Please enter the name of the student you want to modify : Wang 
 Please enter a new mobile phone number :666
 There is no such student ...
[{'id': '002', 'name': ' Li ', 'tel': '222'}, {'id': '003', 'name': ' Wang ', 'tel': '666'}]
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :4
 Please enter the name of the student you want to query : Wang 
 No such person was found ...
 The student information found is as follows --------
 The student's student number is 003, The name is Wang , The cell phone number is 666
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :5
 Student number   Name   Mobile phone number 
002  Li  222
003  Wang  666
 Please select a function --------
1. Add Student 
2. Delete Student 
3. Modify students 
4. Enquiry of Students 
5. Show all students 
6. Exit the system 
----------------
 Please enter the function serial number :6
 Are you sure you want to quit ,yes or no?yes
 
Process finished with exit code 0