Sample python program to reading and writing files in Data File handling for class 12 cbse computer science

Reading and writing files in Data File handling 

Hi guys today we are going to see about the sample program to reading and writing files in Data File handling 


1.Write a program to display the size of a file in bytes.

myfile = open(r'E: \poem. txt', "r")

str = myfile.read() 

size = len(str) print("Size of the given file poem. txt is")

print (size, "bytes")


2.Write a program to display the number of lines in the file.

myfile = open(r'E: \poem.txt", "r")

s = myfile.readlines ()

linecount = len(s)

print("Number of lines in poem. txt is", linecount)

myfile.close()


3.Create a file to hold some data, separated as lines

fileout= open("Student1.txt", "w")

for i in range(5):

         name = input ("Enter name of student :")

         fileout.write(name)

         fileout.write('\n') +

fileout.close()


4.Reading a file's first three lines - line by line

myfile = open(r'E: \poem.txt', "r")

str = myfile.readline()

print (str, end = ' ') str = myfile.readline()

print (str, end = '') 

str = myfile.readline()

print (str, end = ' ')

myfile.close()

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