print('  =====================')
print(" 丨 python1806管理系统  丨".center(20))
print(" 丨     1.添加学生      丨".center(20))
print(" 丨     2.查看学生      丨".center(20))
print(" 丨     3.删除学生      丨".center(20))
print(" 丨     4.修改信息      丨".center(20))
print(" 丨     5.退出系统      丨".center(20))
print('  =====================')
py_system = {'students': []}
all_students = {}
new_students = {}
for x in range(10000):
    print("==================================================\
    \n主菜单：1.添加学生.2.查看学生.3.删除学生.4.修改信息.5退出\
    \n==================================================")
    num1 = input("请输入选项：")
    all_students = py_system['students'].copy()
    if num1 == '1':
        print("  ------------------".center(19))
        print("   添加学生信息  ".center(17))
        print("  ------------------".center(19))
        name1 = input("请输入姓名：")
        age1 = input("请输入年龄：")
        ele1 = input("请输入号码：")
        student1 = {'姓名': name1, '年龄': age1, '电话': ele1}
        py_system['students'].append(student1)
        print("----------------------")
        print("  添加成功 返回主菜单 ".center(15))
        print("----------------------")

    elif num1 == '2':
        if py_system['students'] == []:
            print("------------------")
            print("信息为空！".center(15))
            print("------------------")
        else:
            print("\n")
            print("  ------------------".center(19))
            print("       用户信息      ".center(17))
            print("  ------------------".center(19))
            print(py_system['students'])
            print("\n")

    elif num1 == '3':
        if all_students == []:
            print("---------------------")
            print("信息为空 请添加学生信息！".center(11))
            print("---------------------")
        for new_students in all_students[:]:
            name2 = input("查找需要删除的姓名：")
            if new_students['姓名'] == name2:
                print("\n")
                print("----------------")
                print(("%s同学的信息" % (name2)).center(11))
                print("----------------")
                print(new_students)
                print("\n")
                print("是否确认删除？（Y/N）")
                n = input()
                if n == 'y' or n == 'Y':
                    py_system['students'].remove(new_students)
                    print("-------------------")
                    print('删除成功！！！'.center(15))
                    print("-------------------")
                elif n == 'n' or n == 'N':
                    print("返回主菜单")
                    print("\n")
                    break
                else:
                    print("输入错误！")
            else:
                print("-------------------")
                print("     信息未查询      ")
                print("-------------------")
                continue

    elif num1 == '4':
        if all_students == []:
            print("---------------------")
            print("信息为空 请添加学生信息！".center(11))
            print("---------------------")
        name3 = input("输入姓名修改:")
        for new_students in all_students[:]:
            if new_students['姓名'] == name3:
                print('\n')
                print('  ====================')
                print(" 丨 python1806管理系统 丨   ".center(20))
                print(" 丨   修  改  信  息   丨 ".center(20))
                print(" 丨     1.修改信息     丨   ".center(20))
                print(" 丨     2.返回菜单     丨   ".center(20))
                print('  ====================')
                print("----------------")
                print(("%s同学的信息" % (name3)).center(11))
                print("----------------")
                print(new_students)
                print("-----------------------------------------------------")
                num2 = int(input("修改信息：1.修改信息 2.返回主菜单\n请输入选项："))
                if num2 == 1:
                    print('========================================================')
                    print('修改信息：1.修改姓名.2.修改年龄.3.修改电话.4.返回主菜单')
                    print('========================================================')
                    num3 = int(input("请输入选项："))
                    if num3 == 1:
                        name4 = input("姓名修改为:")
                        for new_students in all_students[:]:
                            if new_students['姓名'] == name3:
                                new_students['姓名'] = name4
                                print('修改成功！！！')
                                print(new_students)
                        break
                    elif num3 == 2:
                        age2 = input("年龄修改为:")
                        for new_students in all_students[:]:
                            if new_students['姓名'] == name3:
                                new_students['年龄'] = age2
                                print('修改成功！！！')
                                print(new_students)
                        break
                    elif num3 == 3:
                        ele1 = input("年龄修改为:")
                        for new_students in all_students[:]:
                            if new_students['姓名'] == name3:
                                new_students['电话'] = ele1
                                print('修改成功！！！')
                                print(new_students)
                        break
                    elif num3 == 4:
                        print("-------------------")
                        print("     返回主菜单     ")
                        print("-------------------")
                else:
                    break
            elif new_students['姓名'] != name3:
                print("%s尚未添加信息资料！" % name3)
    elif num1 == '5':
        print("已退出")
        break
    else:
        print("输入错误！！请重新输入！！")
        continue