import urllib.request, urllib.parse, urllib.error

value = list(range(1, 10))[-1]

if value != 9:
    print("Value %s is not 9" % value)
else:
    print("Value is 9")

try:
    assert 1 == 2
except AssertionError as e:
    print(e)
    print(urllib.request.urlopen('https://docs.python.org/2/library/exceptions.html').read())