[Type B] File Handling – Chapter 5 Sumita Arora

10. Write a method in python to read the content from a text file diary.txt line by line and display the same on screen.

Answer: Here’s a method to read content line by line and display it in Python:

def read_file(file_name):
  try:
    with open(file_name, "r") as file:
      for line in file:
        print(line, end="")
  except FileNotFoundError:
    print(f"Error: File '{file_name}' not found.")

# Example usage
read_file("diary.txt")

Explanation:

• Function Definition: The code defines a function read_file_line_by_line that takes a filename as input.
• Error Handling: It utilizes a try-except block to handle potential file access errors (if the file is not found).
• File Opening: Inside the try block, it opens the file in read mode ("r") using the with statement.
• Reading and Printing: It iterates through each line in the file using a for loop and prints each line with the print statement. An empty string ("") in the print avoids adding extra newlines.