parameters mistake

[ybbz]

1. def getInternalLinks(bsObj, includeUrl) has two parameters, but getInternalLinks(startingPage) has only one parameter and parameter type is not anastomotic. So we should change it to getInternalLinks(bsObj, “”).
2. We should judge the length of internalLinks with len(internalLinks).
3. We don’t have a function named getNextExternalLink, I think getNextExternalLink should change to getRandomExternalLink.