# This program adds numbers from a URL
# and reports the sum of all the numbers.
# This version uses a bad URL to raise an error.

import urllib.request

def main():
    URL = "http://buildingpythonprograms.com/input/numbers.dat"
    sum = 0.0
    with urllib.request.urlopen(URL) as url:
        for n in url.read().split():
            sum += float(n)
    print("Sum is:", round(sum, 1))

main()