#!/usr/bin/python3
"""
takes in a URL, sends a request
to the URL and displays the value
of the variable X-Request-Id in the response header

"""


if __name__ == "__main__":
    import requests
    import sys

    arg1 = sys.argv[1]
    req = requests.get(arg1)
    print(req.headers.get("X-Request-Id"))
