function returning None

[tkj80]

Hi,

I'm working my way through an example in a book. However, it is return an unexpected value. Wonder if someone could help point out what/where I did wrong.

baseUrl ="http://pythonscraping.com" 
source = "www.pythonscraping.com/sites/default/files/lrg_0.jpg"

def getAbsoluteURL(baseUrl, source):
	if source.startswith("http://www."):
		url = "http://"+source[11:]
	elif source.startswith("http://"):
		url = source
	elif source.startswith("www."):
		url = source[4:]
		url = "http://"+source
	else:
		url = baseUrl+"/"+source
	if baseUrl not in url:
		return None
	return url

When I run the following code:

fileUrl = getAbsoluteURL(baseUrl, source)
print(fileUrl)

I got the value None. I thought that the second elif statement would evaluate to True, in which the url returned would be "http://pythonscraping.com/sites/default/files/lrg_0.jpg" as opposed to None.
I tried to trace where it went wrong by only defining the function as:

def getAbsoluteURL(baseUrl, source):
	if source.startswith("http://www."):
		url = "http://"+source[11:]
	elif source.startswith("http://"):
		url = source
	elif source.startswith("www."):
		url = source[4:]
		url = "http://"+source

However, the return value still is None.