Question

Write a script named numberlines.py. This script creates a program listing from a source program. This script should: Prompt the user for the names of two files. The input filename could be the name of the script itself, but be careful to use a different output filename! The script copies the lines of text from the input file to the output file, numbering each line as it goes. The line numbers should be right-justified in 4 columns, so that the format of a line in the output file looks like this example: 1> This is the first line of text

Answer 1

Answer:

See explaination for program code.

Explanation:

inputFileName = input("Input filename: ") outputFileName = input("Output filename: ") inputFile = open(inputFileName, "r") outputFile = open(outputFileName, "w") count = 1 for line in inputFile: newLine = str(count).rjust(4, " ") + "> " + line outputFile.write(newLine) print(newLine) count += 1