Lab 1 — Read a Device List and Print with Line Numbers

Objective: Open a text file of hostnames and print each one with a formatted line number.

Instructions

First, create a file called devices.txt with exactly this content — one hostname per line:

sw-core-01
sw-access-01
sw-access-02
rtr-edge-01
fw-dmz-01

Then create lab1.py and write a script that reads the file and prints each hostname with a right-aligned two-digit line number.

Your output must match exactly:

 1. sw-core-01
 2. sw-access-01
 3. sw-access-02
 4. rtr-edge-01
 5. fw-dmz-01

Run it with python3 lab1.py. Paste your output below and submit.

Starter Code

with open("devices.txt") as f:
    for num, line in enumerate(f, start=1):
        print(f"{num:2}. {line.strip()}")

💡 Show Hint

Use enumerate(f, start=1) to get the line number alongside each line. Use {num:2} in the f-string to right-align the number in 2 characters.

Paste Your Output