def writeStudent():
    with open("Student.txt" ,'a') as file :
        ch ='Y'
        while ch =='Y':
            Id=input('Enter the id : ')
            Name=input('Enter the name : ')
            Age=input('Enter the age : ')
            file.write(Id + '\t' + Name + '\t' + Age +'\n')
            ch = input('if u want to continue [ Y/N ] : ')

def readStudent() :
    with open("Student.txt" ,'r' ) as file :
        print("Id\tName\tAge\n")
        for line in file :
            print(line , end='')


def updateStudent() :
    import os
    ID=input('Enter the id for update its age :')
    with open("Student.txt" ,'r' ) as file :
        with open("StudentTemp.txt" , 'a') as temp :
         for line in file :
             L = line.split('\t')
             if ID==L[0] : ## this record
                 Age= input('Enter the new age : ')
                 L[2]= Age
                # line = L[0] + '\t' + L[1] + '\t' + L[2] + '\n'
             temp.write(L[0] + '\t' + L[1] + '\t' + L[2] + '\n' )

    os.remove("Student.txt")
    os.rename("StudentTemp.txt" ,"Student.txt")