初学python，写一个小程序练习一下。主要功能就是增删改查的一些功能。主要用到的技术：字典的使用，pickle的使用，io文件操作。代码如下：
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 FUNC_NUM + 1: print('num is between 1-%d' % (FUNC_NUM + 1)) continue #print(index) func[index]()
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