Introduction

The task is to copy the odd lines text to another file.

Program

readFile = open("first.txt", "r") 
writeFile = open("updated.txt", "w") 


lines = readFile.readlines() 
type(lines) 
for idx in range(0, len(lines)): 
#check for odd lines
    if(idx % 2 != 0): 
        writeFile.write(lines[idx]) 
    else: 
        pass
writeFile.close() 
readFile.close() 
writeFile = open("updated.txt", "r") 


lines1 = writeFile.read() 


print(lines1) 
writeFile.close()

Output

Explanation

Approach:

• Open the text files in read mode and empty text file in write mode.
• Read the lines of text file and assign to a variable.
• Traverse through all the lines in range(0, len(lines)) and check whether the idx is divisible by 2.
• If idx is not divisible by 2, write the content of line to another file else if it is divisible the skip and move to next idx.
• Close the files.
• Open the file and read its content. Print the content on screen.
• Close the file.