SCHOOL RESOURCES ARCHIVE
All school related resources stored here. (maintained by Sujal Singh)
RESOURCE LIST
Write a menu driven program to do the following functions:-
a) To create a binary file ‘student.dat’ containing fields as rno, name, marks and grade in a list.
b) Display the details of all those students who have got grade A.
"""
Write a menu driven program to do the following functions:-
a) To create a binary file 'student.dat' containing fields as rno, name, marks and grade in a list.
b) Display the details of all those students who have got grade A.
"""
import pickle
def create():
file = open("student.dat", "wb")
while input("Add values (y/n): ").lower() == "y":
pickle.dump([
int(input("Enter roll no: ")),
input("Enter student name: "),
int(input("Enter student's marks: ")),
input("Enter student's grade: ")
], file)
file.close()
def display():
file = open("student.dat", "rb")
matched = False
try:
while True:
student = pickle.load(file)
grade = student[-1]
if grade.lower() == "a":
matched = True
print("Roll No: {} | Student Name: {} | Marks: {} | Grades: {}".format(*student))
except EOFError:
if not matched:
print("NO GRADE A STUDENTS EXIST")
file.close()
def menu():
while True:
print("\n"
"1: Create File",
"2: Display Students with grade A",
"3: Exit", sep="\n")
choice = input("Enter your choice: ")
if choice == "1":
create()
elif choice == "2":
display()
elif choice == "3":
print("Exiting...")
break
else:
print("INVALID CHOICE TRY AGAIN...")
menu()
"""
OUTPUT:
1: Create File
2: Display Students with grade A
3: Exit
Enter your choice: 1
Add values (y/n): y
Enter roll no: 1
Enter student name: feynman
Enter student's marks: 99
Enter student's grade: A
Add values (y/n): y
Enter roll no: 2
Enter student name: turing
Enter student's marks: 95
Enter student's grade: A
Add values (y/n): y
Enter roll no: 3
Enter student name: neumann
Enter student's marks: 80
Enter student's grade: B
Add values (y/n): n
1: Create File
2: Display Students with grade A
3: Exit
Enter your choice: 2
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Roll No: 2 | Student Name: turing | Marks: 95 | Grades: A
1: Create File
2: Display Students with grade A
3: Exit
Enter your choice: 3
Exiting...
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘product.dat’ in the following format : {‘name’ : ‘file’, ‘price’ : 112},
{‘name’ : ‘pen’, ‘price’ : 30}, etc.
b) To display the above file
c) Transfer all the records from binary file ‘product.dat’ to ‘new.dat’ whose price is less than 100.
"""
Write a menu driven program to do the following:-
a) To create a binary file 'product.dat' in the following format : {‘name’ : ‘file’, ‘price’ : 112},
{‘name’ : ‘pen’, ‘price’ : 30}, etc.
b) To display the above file
c) Transfer all the records from binary file ‘product.dat’ to ‘new.dat’ whose price is less than 100.
"""
import pickle
def create():
file = open("product.dat", "wb")
while input("Enter values (y/n): ").lower() == "y":
print()
pickle.dump({
"name": input("Enter product name: "),
"price": float(input("Enter price: "))
}, file)
file.close()
def read(file_name):
try:
file = open(file_name, "rb")
except FileNotFoundError:
print("FILE DOES NOT EXIST, CREATE IT FIRST.")
return []
buffer = []
try:
while True:
buffer.append(pickle.load(file))
except EOFError:
file.close()
return buffer
def display():
db = read("product.dat")
for item in db:
print(f"{item['name']} : ₹{item['price']}")
def transfer():
new_file = open("new.dat", "wb")
db = read("product.dat")
for item in db:
if item["price"] < 100:
pickle.dump(item, new_file)
new_file.close()
print("Transferred successfully")
def display_transferred():
db = read("new.dat")
for item in db:
print(f"{item['name']} : ₹{item['price']}")
def menu():
while True:
print("\n"
"1: Create File",
"2: Display File",
"3: Transfer Cheap",
"4: Display New File",
"5: Exit", sep="\n")
choice = input("Enter your choice: ")
if choice == "1":
create()
elif choice == "2":
display()
elif choice == "3":
transfer()
elif choice == "4":
display_transferred()
elif choice == "5":
print("Exiting...")
break
else:
print("INVALID CHOICE TRY AGAIN...")
menu()
"""
OUTPUT:
1: Create File
2: Display File
3: Transfer Cheap
4: Display New File
5: Exit
Enter your choice: 1
Enter values (y/n): y
Enter product name: pen
Enter price: 10
Enter values (y/n): y
Enter product name: pencil
Enter price: 5
Enter values (y/n): y
Enter product name: geometry box
Enter price: 150
Enter values (y/n): n
1: Create File
2: Display File
3: Transfer Cheap
4: Display New File
5: Exit
Enter your choice: 2
pen : ₹10.0
pencil : ₹5.0
geometry box : ₹150.0
1: Create File
2: Display File
3: Transfer Cheap
4: Display New File
5: Exit
Enter your choice: 3
Transferred successfully
1: Create File
2: Display File
3: Transfer Cheap
4: Display New File
5: Exit
Enter your choice: 4
pen : ₹10.0
pencil : ₹5.0
1: Create File
2: Display File
3: Transfer Cheap
4: Display New File
5: Exit
Enter your choice: 5
Exiting...
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘student.dat’ containing fields as rno, name, marks and grade in a list.
b) Function to update a record for a given roll number without using another file.
b) Display the file after and before updating
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘student.dat’ containing fields as rno, name, marks and grade in a list.
b) Function to update a record for a given roll number without using another file.
b) Display the file after and before updating
"""
import pickle
def create():
file = open("student.dat", "wb")
while input("Add values (y/n): ").lower() == "y":
pickle.dump([
int(input("Enter roll no: ")),
input("Enter student name: "),
int(input("Enter student's marks: ")),
input("Enter student's grade: ")
], file)
file.close()
def display():
file = open("student.dat", "rb")
try:
while True:
student = pickle.load(file)
print("Roll No: {} | Student Name: {} | Marks: {} | Grades: {}".format(*student))
except EOFError:
file.close()
def update():
print("FILE BEFORE UPDATING:")
display()
file = open("student.dat", "rb")
search_roll_no, matched = int(input("Enter roll to look for: ")), False
buffer = []
try:
while True:
student_data = pickle.load(file)
current_roll_no = student_data[0]
if current_roll_no == search_roll_no:
matched = True
print("MATCH FOUND, UPDATE NOW:")
buffer.append([
int(input("Enter new roll no: ")),
input("Enter student new name: "),
int(input("Enter student's new marks: ")),
input("Enter student's new grade: ")
])
else:
buffer.append(student_data)
except EOFError:
file.close()
if not matched:
print("NO MATCH WAS FOUND")
file = open("student.dat", "wb")
for student in buffer:
pickle.dump(student, file)
file.close()
print("FILE AFTER UPDATING")
display()
def menu():
while True:
print("\n"
"1: Create File",
"2: Display File",
"3: Update and Display",
"4: Exit", sep="\n")
choice = input("Enter your choice: ")
if choice == "1":
create()
elif choice == "2":
display()
elif choice == "3":
update()
elif choice == "4":
print("Exiting...")
break
else:
print("INVALID CHOICE TRY AGAIN...")
menu()
"""
OUTPUT:
1: Create File
2: Display File
3: Update and Display
4: Exit
Enter your choice: 1
Add values (y/n): y
Enter roll no: 1
Enter student name: feynman
Enter student's marks: 99
Enter student's grade: A
Add values (y/n): y
Enter roll no: 2
Enter student name: turing
Enter student's marks: 95
Enter student's grade: A
Add values (y/n): y
Enter roll no: 3
Enter student name: neumann
Enter student's marks: 80
Enter student's grade: B
Add values (y/n): n
1: Create File
2: Display File
3: Update and Display
4: Exit
Enter your choice: 2
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Roll No: 2 | Student Name: turing | Marks: 95 | Grades: A
Roll No: 3 | Student Name: neumann | Marks: 80 | Grades: B
1: Create File
2: Display File
3: Update and Display
4: Exit
Enter your choice: 3
FILE BEFORE UPDATING:
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Roll No: 2 | Student Name: turing | Marks: 95 | Grades: A
Roll No: 3 | Student Name: neumann | Marks: 80 | Grades: B
Enter roll to look for: 2
MATCH FOUND, UPDATE NOW:
Enter new roll no: 4
Enter student new name: alan
Enter student's new marks: 90
Enter student's new grade: A
FILE AFTER UPDATING
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Roll No: 4 | Student Name: alan | Marks: 90 | Grades: A
Roll No: 3 | Student Name: neumann | Marks: 80 | Grades: B
1: Create File
2: Display File
3: Update and Display
4: Exit
Enter your choice: 4
Exiting...
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘student.dat’ containing fields as rno, name, marks and grade in a list.
b) Function to delete a record for a given roll number.
b) Display the file after and before updating
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘student.dat’ containing fields as rno, name, marks and grade in a list.
b) Function to delete a record for a given roll number.
b) Display the file after and before updating
"""
import pickle
def create():
file = open("student.dat", "wb")
while input("Add values (y/n): ").lower() == "y":
pickle.dump([
int(input("Enter roll no: ")),
input("Enter student name: "),
int(input("Enter student's marks: ")),
input("Enter student's grade: ")
], file)
file.close()
def display():
file = open("student.dat", "rb")
try:
while True:
student = pickle.load(file)
print("Roll No: {} | Student Name: {} | Marks: {} | Grades: {}".format(*student))
except EOFError:
file.close()
def delete():
print("FILE BEFORE DELETION:")
display()
file = open("student.dat", "rb")
search_roll_no, matched = int(input("Enter roll no to look for: ")), False
buffer = []
try:
while True:
student_data = pickle.load(file)
current_roll_no = student_data[0]
if current_roll_no != search_roll_no:
buffer.append(student_data)
else:
matched = True
except EOFError:
file.close()
if not matched:
print("NO MATCH WAS FOUND")
else:
file = open("student.dat", "wb")
for student in buffer:
pickle.dump(student, file)
file.close()
print("DELETED SUCCESSFULLY, NEW FILE:")
display()
def menu():
while True:
print("\n"
"1: Create File",
"2: Display File",
"3: Delete Student and Display",
"4: Exit", sep="\n")
choice = input("Enter your choice: ")
if choice == "1":
create()
elif choice == "2":
display()
elif choice == "3":
delete()
elif choice == "4":
print("Exiting...")
break
else:
print("INVALID CHOICE TRY AGAIN...")
menu()
"""
OUTPUT:
1: Create File
2: Display File
3: Delete Student and Display
4: Exit
Enter your choice: 1
Add values (y/n): y
Enter roll no: 1
Enter student name: feynman
Enter student's marks: 99
Enter student's grade: A
Add values (y/n): y
Enter roll no: 2
Enter student name: turing
Enter student's marks: 95
Enter student's grade: A
Add values (y/n): n
1: Create File
2: Display File
3: Delete Student and Display
4: Exit
Enter your choice: 2
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Roll No: 2 | Student Name: turing | Marks: 95 | Grades: A
1: Create File
2: Display File
3: Delete Student and Display
4: Exit
Enter your choice: 3
FILE BEFORE DELETION:
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Roll No: 2 | Student Name: turing | Marks: 95 | Grades: A
Enter roll no to look for: 2
DELETED SUCCESSFULLY, NEW FILE:
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
1: Create File
2: Display File
3: Delete Student and Display
4: Exit
Enter your choice: 3
FILE BEFORE DELETION:
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
Enter roll no to look for: 899
NO MATCH WAS FOUND
1: Create File
2: Display File
3: Delete Student and Display
4: Exit
Enter your choice: 2
Roll No: 1 | Student Name: feynman | Marks: 99 | Grades: A
1: Create File
2: Display File
3: Delete Student and Display
4: Exit
Enter your choice: 4
Exiting...
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘item.dat’ containing fields as
item_id, item_name, price, quantity in the following format:
[[121,pen,20,5],[21,pencil,10,10],…..]
b) To display the above file
c) Add more item details in the existing file.
d) Display the details of an item for a given item_id.
"""
Write a menu driven program to do the following:-
a) To create a binary file ‘item.dat’ containing fields as
item_id, item_name, price, quantity in the following format:
[[121,pen,20,5],[21,pencil,10,10],…..]
b) To display the above file
c) Add more item details in the existing file.
d) Display the details of an item for a given item_id.
"""
import pickle
def create():
data = []
while input("Enter values (y/n): ").lower() == "y":
data.append([
int(input("Enter item id: ")),
input("Enter item name: "),
float(input("Enter item price: ")),
int(input("Enter item quantity: "))
])
file = open("student.dat", "wb")
pickle.dump(data, file)
file.close()
def display():
file = open("student.dat", "rb")
data = pickle.load(file)
file.close()
for item in data:
print("ITEM ID: {} | ITEM NAME: {} | PRICE: {} | QUANTITY: {}".format(*item))
def append():
file = open("student.dat", "rb")
data = pickle.load(file)
file.close()
print("ENTER NEW ITEMS")
while input("Enter values (y/n): ").lower() == "y":
data.append([
int(input("Enter item id: ")),
input("Enter item name: "),
float(input("Enter item price: ")),
int(input("Enter item quantity: "))
])
file = open("student.dat", "wb")
pickle.dump(data, file)
file.close()
def seek():
file = open("student.dat", "rb")
data = pickle.load(file)
file.close()
search_id = int(input("Enter search item id: "))
for item in data:
current_id = item[0]
if current_id == search_id:
print("ITEM ID: {} | ITEM NAME: {} | PRICE: {} | QUANTITY: {}".format(*item))
break
else:
print("NO MATCH FOUND")
def menu():
while True:
print("\n"
"1: Create File",
"2: Display File",
"3: Append to file",
"4: Search for item",
"5: Exit", sep="\n")
choice = input("Enter your choice: ")
if choice == "1":
create()
elif choice == "2":
display()
elif choice == "3":
append()
elif choice == "4":
seek()
elif choice == "5":
print("Exiting...")
break
else:
print("INVALID CHOICE TRY AGAIN...")
menu()
"""
OUTPUT:
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 1
Enter values (y/n): y
Enter item id: 1
Enter item name: pen
Enter item price: 10
Enter item quantity: 100
Enter values (y/n): y
Enter item id: 2
Enter item name: pencil
Enter item price: 5
Enter item quantity: 2000
Enter values (y/n): n
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 2
ITEM ID: 1 | ITEM NAME: pen | PRICE: 10.0 | QUANTITY: 100
ITEM ID: 2 | ITEM NAME: pencil | PRICE: 5.0 | QUANTITY: 2000
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 3
ENTER NEW ITEMS
Enter values (y/n): y
Enter item id: 3
Enter item name: geometry box
Enter item price: 200
Enter item quantity: 20
Enter values (y/n): n
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 2
ITEM ID: 1 | ITEM NAME: pen | PRICE: 10.0 | QUANTITY: 100
ITEM ID: 2 | ITEM NAME: pencil | PRICE: 5.0 | QUANTITY: 2000
ITEM ID: 3 | ITEM NAME: geometry box | PRICE: 200.0 | QUANTITY: 20
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 4
Enter search item id: 3
ITEM ID: 3 | ITEM NAME: geometry box | PRICE: 200.0 | QUANTITY: 20
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 4
Enter search item id: 98
NO MATCH FOUND
1: Create File
2: Display File
3: Append to file
4: Search for item
5: Exit
Enter your choice: 5
Exiting...
"""
RAISE AN ISSUE ON GITHUB IF
- Answer is wrong
- Want a missing question to be added
- Need help with a question
- Need help navigating the website
- Website has a bug
WANT TO CONTRIBUTE RESOURCES?
Fork this repository, make changes, create a pull request.