Binary File to maintain student records
Student Data maintained :
roll number
name
per
To Add record in a Binary File
Points
1. if the file does not exist the create a binary file
2. if the file exits then open the file in append mode
3. Take input for roll, name and per.
4. store them in a variable rec
5. write the record in the binary file using pickle.dump()
6. close the file
import pickle
import os
#function definition
def add_record():
try:
if os.path.isfile("stud"):
f=open("stud","ab")
else:
f=open("stud","wb")
roll=int(input("Enter roll no "))
name=input("Enter name ")
name=name.upper()
per=float(input("Enter per "))
rec=[roll,name,per]
pickle.dump(rec,f)
print("Record added in file")
except EOFError:
f.close()
#function calling
add_record()
program with validations
import pickle
import os
#function definition
def add_record():
try:
if os.path.isfile("stud"):
f=open("stud","ab")
else:
f=open("stud","wb")
"""
roll=int(input("Enter roll no "))
name=input("Enter name ")
name=name.upper()
per=float(input("Enter per "))
"""
#roll no input
while True:
z=0
roll=input("Enter roll no (4 digit) :")
if not roll.isdigit():
print("Rollno Has to be Numeric")
input("Press Enter to input again...")
z=1
continue
if not (int(roll)>=1000 and int(roll)<=9999):
print("Rollno Has to be in 4 digitsd")
input("Press Enter to input again...")
z=1
continue
if z!=1:
break
# Name input
while True:
z=0
name=input("Enter Name :")
if not name.isalpha():
print("Name Has to be Alphabetic")
input("Press Enter to input again ... ")
z=1
continue
if z!=1:
break
# per input
while True:
z=0
per=input("Enter per :")
if not per.isdigit():
print("Per Has to be Numeric")
input("Press Enter to input again...")
z=1
continue
if not (int(per)>=0 and int(per)<=100):
print("Per Has to be >=0 and <=100")
input("Press Enter to input again...")
z=1
continue
if z!=1:
break
rec=[int(roll),name.upper(),float(per)]
pickle.dump(rec,f)
print("Record added in file")
except EOFError:
f.close()
#function calling
add_record()
