Write a program to create a text file of students to store Roll No., Name and three subject marks obtained by the students in a class of 15 students.
Program:
student=open("marks.txt",'w')
for i in range(3):
record=""
r=input("Enter Roll No. :")
record=record+r+"\n"
nm=input("Enter Name:")
record=record+nm+"\n"
m1=input("Enter Marks1 :")
record=record+m1+"\n"
m2=input("Enter Marks 2:")
record=record+m2+"\n"
m3=input("Enter Marks 3:")
record=record+m3+"\n"
student.write(record)
student.close()
Write a program to add details of two more student into the text file 'marks.txt' which is already created on the disk.
Program:
student=open('marks.txt', 'a')
for i in range (2):
record=""
r=input("Enter Roll No. :")
record=record+r+"\n"
nm=input("Enter Name: ")
record=record+nm+"\n"
m1=input("Enter Marks 1: ")
record=record+m1+"\n"
m2=input("Enter Marks 2:")
record=record+m2+"\n"
m3=input("Enter Marks 3: ")
record=record+m3+"\n"
student.write(record)
student.close()
Output:
Enter Roll No. :101
Enter Name: Raj
Enter Marks 1: 89
Enter Marks 2:90
Enter Marks 3: 78
Enter Roll No. :102
Enter Name: Rita
Enter Marks 1: 89
Enter Marks 2:67
Enter Marks 3: 78
Write a python program to read a random line from a file
Program:
import random
def random_line(afile):
line = next(afile)
for num, aline in enumerate(afile, 2):
if random.randrange(num):
continue
line = aline
return line