Python中的学生管理系统
先决条件： Python中的类和对象
问题陈述：
编写一个程序，使用Python构建一个简单的学生管理系统，可以执行以下操作：
- 接受
- 展示
- 搜索
- 删除
- 更新
方法：以下是进行上述操作的方法：
- 接受- 此方法从用户那里获取详细信息，例如姓名、卷号和两个不同主题的分数。
# Method to enter new student details def accept(self, Name, Rollno, marks1, marks2 ): # Creates a new class constructor # and pass the details ob = Student(Name, Rollno, marks1, marks2 ) # list containing objects of student class ls.append(ob) - 显示- 此方法显示每个学生的详细信息。
# Function to display student details def display(self, ob): print("Name : ", ob.name) print("RollNo : ", ob.rollno) print("Marks1 : ", ob.m1) print("Marks2 : ", ob.m2) print("\n") - 搜索- 此方法从学生列表中搜索特定学生。
此方法会询问用户卷号，然后根据卷号进行搜索# Search Function def search(self, rn): for i in range(ls.__len__()): # iterate through the list containing # student object and checks through # roll no of each object if(ls[i].rollno == rn): # returns the object with matching # roll number return i - 删除- 此方法删除具有匹配卷号的特定学生的记录。
# Delete Function def delete(self, rn): # Calls the search function # created above i = obj.search(rn) del ls[i] - 更新- 此方法更新学生的卷号。
此方法将询问旧卷号和新卷号。它将用新的卷号替换旧的卷号。# Update Function def update(self, rn, No): # calling the search function # of student class i = obj.search(rn) ls[i].rollno = No下面是上述方法的实现：
# This is simplest Student data management program in python # Create class "Student" class Student: # Constructor def __init__(self, name, rollno, m1, m2): self.name = name self.rollno = rollno self.m1 = m1 self.m2 = m2 # Function to create and append new student def accept(self, Name, Rollno, marks1, marks2 ): # use ' int(input()) ' method to take input from user ob = Student(Name, Rollno, marks1, marks2 ) ls.append(ob) # Function to display student details def display(self, ob): print("Name : ", ob.name) print("RollNo : ", ob.rollno) print("Marks1 : ", ob.m1) print("Marks2 : ", ob.m2) print("\n") # Search Function def search(self, rn): for i in range(ls.__len__()): if(ls[i].rollno == rn): return i # Delete Function def delete(self, rn): i = obj.search(rn) del ls[i] # Update Function def update(self, rn, No): i = obj.search(rn) roll = No ls[i].rollno = roll; # Create a list to add Students ls =[] # an object of Student class obj = Student('', 0, 0, 0) print("\nOperations used, ") print("\n1.Accept Student details\n2.Display Student Details\n" / / "3.Search Details of a Student\n4.Delete Details of Student" / / "\n5.Update Student Details\n6.Exit") # ch = int(input("Enter choice:")) # if(ch == 1): obj.accept("A", 1, 100, 100) obj.accept("B", 2, 90, 90) obj.accept("C", 3, 80, 80) # elif(ch == 2): print("\n") print("\nList of Students\n") for i in range(ls.__len__()): obj.display(ls[i]) # elif(ch == 3): print("\n Student Found, ") s = obj.search(2) obj.display(ls[s]) # elif(ch == 4): obj.delete(2) print(ls.__len__()) print("List after deletion") for i in range(ls.__len__()): obj.display(ls[i]) # elif(ch == 5): obj.update(3, 2) print(ls.__len__()) print("List after updation") for i in range(ls.__len__()): obj.display(ls[i]) # else: print("Thank You !")输出：Operations used, 1.Accept Student details 2.Display Student Details 3.Search Details of a Student 4.Delete Details of Student 5.Update Student Details 6.Exit List of Students Name : A RollNo : 1 Marks1 : 100 Marks2 : 100 Name : B RollNo : 2 Marks1 : 90 Marks2 : 90 Name : C RollNo : 3 Marks1 : 80 Marks2 : 80 Student Found, Name : B RollNo : 2 Marks1 : 90 Marks2 : 90 2 List after deletion Name : A RollNo : 1 Marks1 : 100 Marks2 : 100 Name : C RollNo : 3 Marks1 : 80 Marks2 : 80 2 List after updation Name : A RollNo : 1 Marks1 : 100 Marks2 : 100 Name : C RollNo : 2 Marks1 : 80 Marks2 : 80 Thank You !
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