Python case study subjective question for competitive exam (3)

Q1.How you can implement a function to add student records to the student databases using python list.write the python code to achieve this,considering that each student record consists of a unique student id,firstname,lastname and age.

student=[]
def add_student(id,fname,lname,age):
    for record in student:
        if record['id']==id:
            print("id already exit")
            return -1
    newstudent={'id':id,'fname':fname,'lname':lname,'age':age}
    student.append(newstudent)
c='y'
while c in 'y':
                  id=int(input("enter id"))
                  fname=input("enter first name")
                  lname=input("enter last name")
                  age=int(input("enter age"))
                  add_student(id,fname,lname,age)
                  c=input("do you want to add more student press y otherwise n")
for i in student:
            print(i)

After run module output is 
== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/a22.py ==
enter id 1
enter first name ram
enter last name kumar
enter age 12
do you want to add more student press y otherwise ny
enter id 1
enter first name sham
enter last name kumar
enter age12
id already exit
do you want to add more student press y otherwise ny
enter id 2
enter first name sham
enter last name kumar
enter age 12
do you want to add more student press y otherwise nn
{'id': 1, 'fname': ' ram', 'lname': ' kumar', 'age': 12}
{'id': 2, 'fname': ' sham', 'lname': ' kumar', 'age': 12}

Q2.Implement a function to search for a student by their id in the student database using python list.write the python code to perform the search operation and return the student details if found or display a message if the student is not present in the database.

student=[]
def add_student(id,fname,lname,age):
    for record in student:
        if record['id']==id:
            print("id already exit")
            return -1
    newstudent={'id':id,'fname':fname,'lname':lname,'age':age}
    student.append(newstudent)
c='y'
while c in 'y':
                  id=int(input("enter id"))
                  fname=input("enter first name")
                  lname=input("enter last name")
                  age=int(input("enter age"))
                  add_student(id,fname,lname,age)
                  c=input("do you want to add more student press y otherwise n")
for i in student:
            print(i)
res=-1            
id=int(input("enter id you want to search"))
for record in student:
    if record['id']==id:
        res=id
        break
if res==-1:
    print("not found")
else:
    print("found")
    
    
 Output
>>> 
== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/a22.py ==
enter id1
enter first nameram
enter last namesharma
enter age23
do you want to add more student press y otherwise ny
enter id2
enter first namesham
enter last namesharma
enter age23
do you want to add more student press y otherwise nn
{'id': 1, 'fname': 'ram', 'lname': 'sharma', 'age': 23}
{'id': 2, 'fname': 'sham', 'lname': 'sharma', 'age': 23}
enter id you want to search2
found   
      

Q3.Develop a function to update the age of a student in the student database using python list.write the python code to perform the update operation given the student id and the new age value

student=[]
def add_student(id,fname,lname,age):
    for record in student:
        if record['id']==id:
            print("id already exit")
            return -1
    newstudent={'id':id,'fname':fname,'lname':lname,'age':age}
    student.append(newstudent)
c='y'
while c in 'y':
                  id=int(input("enter id"))
                  fname=input("enter first name")
                  lname=input("enter last name")
                  age=int(input("enter age"))
                  add_student(id,fname,lname,age)
                  c=input("do you want to add more student press y otherwise n")
for i in student:
            print(i)
res=-1            
id=int(input("enter id you want to search"))
for record in student:
    if record['id']==id:
        res=0
        record['age']=age+10
        break
if res==-1:
    print("not found")
for i in student:
            print(i)

Output

>>> 
== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/a22.py ==
enter id1
enter first nameram
enter last namesham
enter age10
do you want to add more student press y otherwise ny
enter id2
enter first namesham
enter last namesharma
enter age10
do you want to add more student press y otherwise nn
{'id': 1, 'fname': 'ram', 'lname': 'sham', 'age': 10}
{'id': 2, 'fname': 'sham', 'lname': 'sharma', 'age': 10}
enter id you want to search2
{'id': 1, 'fname': 'ram', 'lname': 'sham', 'age': 10}
{'id': 2, 'fname': 'sham', 'lname': 'sharma', 'age': 20}

Q4.Develop a function to remove a student record in the student database using python list.write the python code to perform the remove operation given the student id and the new age value

student=[]
def add_student(id,fname,lname,age):
    for record in student:
        if record['id']==id:
            print("id already exit")
            return -1
    newstudent={'id':id,'fname':fname,'lname':lname,'age':age}
    student.append(newstudent)
c='y'
while c in 'y':
                  id=int(input("enter id"))
                  fname=input("enter first name")
                  lname=input("enter last name")
                  age=int(input("enter age"))
                  add_student(id,fname,lname,age)
                  c=input("do you want to add more student press y otherwise n")
for i in student:
            print(i)
res=-1            
id=int(input("enter id you want to search"))
for record in student:
    if record['id']==id:
        res=0
        student.remove(record)
        break
if res==-1:
    print("not found")
for i in student:
            print(i)
    
output
>>> 
== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/a22.py ==
enter id1
enter first namereema
enter last namesharma
enter age12
do you want to add more student press y otherwise ny
enter id2
enter first namenitin
enter last namesharma
enter age23
do you want to add more student press y otherwise nn
{'id': 1, 'fname': 'reema', 'lname': 'sharma', 'age': 12}
{'id': 2, 'fname': 'nitin', 'lname': 'sharma', 'age': 23}
enter id you want to search2
{'id': 1, 'fname': 'reema', 'lname': 'sharma', 'age': 12}
>>>     

Q5.Develop a function to update the age of all student in the student database using python list.write the python code to perform the update operation.

student=[]
def add_student(id,fname,lname,age):
    for record in student:
        if record['id']==id:
            print("id already exit")
            return -1
    newstudent={'id':id,'fname':fname,'lname':lname,'age':age}
    student.append(newstudent)
c='y'
while c in 'y':
                  id=int(input("enter id"))
                  fname=input("enter first name")
                  lname=input("enter last name")
                  age=int(input("enter age"))
                  add_student(id,fname,lname,age)
                  c=input("do you want to add more student press y otherwise n")
for i in student:
            i['age']=i['age']+10
            print(i)

Output

>>> 
=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/k.py ===
enter id1
enter first nameram
enter last namesharma
enter age12
do you want to add more student press y otherwise ny
enter id2
enter first namesham
enter last namearora
enter age10
do you want to add more student press y otherwise nn
{'id': 1, 'fname': 'ram', 'lname': 'sharma', 'age': 22}
{'id': 2, 'fname': 'sham', 'lname': 'arora', 'age': 20}