Python writes phone book to implement addition, deletion, modification and query

This article mainly introduces in detail the relevant information for writing phone books in Python to implement the addition, deletion, modification and search functions. Friends who are interested can refer to

Beginners learn python and write a small program to practice. The main function is to add, delete, modify and check some functions. Mainly used technologies: use of dictionary, use of pickle, io file operation. The code is as follows:

import pickle

#studentinfo = {'netboy': '15011038018',\
#                'godboy': '15011235698'}
studentinfo = {}

FUNC_NUM = 5

def write_file(value):
    file = open('student_info.txt', 'wb')
    file.truncate()
    pickle.dump(value, file, True)
    file.close

def read_file():
    global studentinfo
    file = open('student_info.txt', 'rb')
    studentinfo = pickle.load(file)
    file.close()

def search_student():
    global studentinfo
    name = input('please input student\'s name:')
    if name in studentinfo:
        print('name:%s phone:%s' % (name, studentinfo[name]))
    else:
        print('has no this body')

def delete_student():
    global studentinfo
    name = input('please input student\'s name:')
    if name in studentinfo:
        studentinfo.pop(name)
        write_file(studentinfo)
    else:
        print('has no this body')

def add_student():
    global studentinfo
    name = input('please input student\'s name:')
    phone = input('please input phone:')
    studentinfo[name] = phone
    write_file(studentinfo)

def modifiy_student():
    global studentinfo
    name = input('please input student\'s name:')
    if name in studentinfo:
        phone = input('please input student\'s phone:')
        studentinfo[name] = phone
    else:
        print('has no this name')

def show_all():
    global studentinfo
    for key, value in studentinfo.items():
        print('name:' + key + 'phone:' + value)

func = {1 : search_student, \
    2 : delete_student, \
    3 : add_student, \
    4 : modifiy_student, \
    5 : show_all}

def menu():
    print('-----------------------------------------------');
    print('1 search student:')
    print('2 delete student:')
    print('3 add student:')
    print('4 modifiy student:')
    print('5 show all student')
    print('6 exit')
    print('-----------------------------------------------');

def init_data():
    global studentinfo
    file = open('student_info.txt', 'rb')
    studentinfo = pickle.load(file)
    #print(studentinfo)
    file.close()

init_data()
while True:
    menu()
    index = int(input())
    if index == FUNC_NUM + 1:
        exit()
    elif index < 1 or index > FUNC_NUM + 1:
        print('num is between 1-%d' % (FUNC_NUM + 1))
        continue
    #print(index)
    func[index]()

The above is the entire content of this article. I hope it will be helpful to everyone learning Python programming.

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