Write a phone book in Python to add, delete, modify, and query functions.
For python beginners, write a small program to practice. The main function is to add, delete, modify, and query functions. The main technologies used: dictionary usage, pickle usage, and io file operations. The Code is as follows:
import pickle#studentinfo = {'netboy': '15011038018',\# 'godboy': '15011235698'}studentinfo = {}FUNC_NUM = 5def write_file(value): file = open('student_info.txt', 'wb') file.truncate() pickle.dump(value, file, True) file.closedef 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 all the content of this article. I hope it will help you learn Python programming.