Question

Write a program to accept a filename from the user and display all the lines from the file which contain python comment character '#'.

Answer 1

filename = input("Enter filename: ")

try:
    with open(filename, "r") as file:
        for line_number, line in enumerate(file, start=1):
            if "#" in line:
                print(line_number, line.rstrip("\n"))
except FileNotFoundError:
    print("File does not exist.")

The program displays both the line number and the matching line.