Quoting the official docs at https://docs.python.org/2.0/ref/strings.html:
In plain English: String literals can be enclosed in matching single quotes (') or double quotes (").
So there is no difference. Instead, people will tell you to choose whichever style that matches the context, and to be consistent. And I would agree - adding that it is pointless to try to come up with "conventions" for this sort of thing because you'll only end up confusing any newcomers.
