python面试题&练习题之函数

def res_max(number1,number2):
    l1 = []
    l1.append(number1)
    l1.append(number2)
    return max(l1)

def getnewlist(mylist):
　　list1=[];
　　for i in range(0,len(mylist)):
　　　　if i%2!=0:
　　　　list1.append(mylist[i])
　　return list1

def judge_len(list1):
    if len(list1)>5:
        return list1[0:5]
    elif len(list1)<=5:
        return list1

def str_spack(string):
    if string.find(‘ ‘):
        return True
    else:
        return False

def arithmetic(number1, number2, symbol):
   
    if symbol == ‘+‘:
        s = number1 + number2
    elif symbol == ‘-‘:
        s = number1 - number2
    elif symbol == ‘*‘:
        s = number1 * number2
    elif symbol == ‘/‘:
        s = number1 / number2
    return s

方法二：
def getresult(num1,fh,num2):
    str1=str(num1)+fh+str(num2)
    return eval(str1)
print(getresult(10,‘*‘,20))

def student_management_system():
    st1="""
    -----------------------欢迎进入T666班学生管理系统-----------------------------
请选择系统功能：
0:显示所有学员信息
1:添加一个学员信息
2:删除一个学员信息
3:修改一个学员信息
4:查询一个学员信息
exit:退出学生管理系统
    """
    option = input(st1)
    if option == ‘0‘:
        show_student()
    elif option == ‘1‘:
        add_student()
    elif option == ‘2‘:
        del_student()
    elif option == ‘3‘:
        revise_student()
    elif option == ‘4‘:
        query_student()
    elif option == ‘exit‘:
        quit()

def show_student():
    print(liste)

def add_student():
    username = input(‘请输入增加人的姓名：张三‘)
    liste.append(username)
    print(liste)

def del_student():
    liste.append(‘张三‘)
    username = input(‘请输入删除人的姓名：张三‘)
    liste.remove(username)
    print(liste)

def revise_student():
    liste.append(‘张三‘)
    username1 = input(‘请输入需要修改人的姓名：张三‘)
    username2 = input(‘请输入需要修改后的姓名：李四‘)
    if username1 not in liste:
        print(‘T666班没有这个学员‘)
    for i in liste:
        if i == username1:
            liste[liste.index(username1)] = username2
    print(liste)

def query_student():
    liste.append(‘张三‘)
    username1 = input(‘请输入查询人的姓名：张三‘)
    if username1 not in liste:
        print(‘T666班没有这个学员‘)
    print(liste[::-1])

def quit():
    print(‘欢迎使用T666的学生管理系统，下次再见。‘)

方法二：用类改写

class StudentManagementSystem:
    list1 = ["郭易", "汤碗珍"]
    str1 = ‘‘‘
    -----------------------欢迎进入T666班学生管理系统-----------------------------
    请选择系统功能：
    0:显示所有学员信息
    1:添加一个学员信息
    2:删除一个学员信息
    3:修改一个学员信息
    4:查询一个学员信息
    exit:退出学生管理系统
    ‘‘‘

    def __init__(self):
        print(self.str1)

    def input_option(self, option,student = None,student1 = None):
        try:
            if option == 0:
                return self.get_student()
            elif option == 1:
               return self.add_student(student)
            elif option == 2:
               return self.del_student(student)
            elif option == 3:
               return self.modify_student(student,student1)
            elif option == 4:
               return self.select_student(student)
            elif option == ‘exit‘:
               return self.quit()
        except:
            print(‘输入选项错误‘)

    def get_student(self):  # 输入0
        return self.list1

    def add_student(self, student):  # 输入1
        user = student
        self.list1.append(user)
        return self.list1

    def del_student(self, student):  # 输入2
        self.list1.append(‘张三‘)
        user1 = student
        if user1 in self.list1:
            self.list1.remove(user1)
        else:
            print(‘T666班没有这个学员‘)
        return self.list1

    def modify_student(self, student1,student2):  # 输入3
        self.list1.append(‘张三‘)
        user2 = student1
        user3 = student2
        if user2 in self.list1:
            for i in self.list1:
                if i == user2:
                    self.list1[self.list1.index(user2)]=user3
        else:
            print(‘T666班没有这个学员‘)
        return self.list1

    def select_student(self,student):  #输入4
        self.list1.append(‘张三‘)
        user4 = student
        if user4 in self.list1:
            for i in self.list1:
                if i == user4:
                    return self.list1[self.list1.index(i)]
        else:
            print(‘T666班没有这个学员‘)

    def quit(self):
        print(‘欢迎使用T666的学生管理系统，下次再见。‘)