[Tutor] Read same instance twice

[Brian C. Lane]

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Øyvind wrote:
> Hello.
> 
> I am trying to gather some information from a webpage:
> 
> side = urlopen("http://www.website.no")
> rawstr = r"""spy.target="_top">(.*?)$"""
> rawstr2 = r"""spy.target2="_top">(.*?)$"""
> 
> compile_obj = re.compile(rawstr,  re.IGNORECASE| re.MULTILINE| re.VERBOSE
> | re.UNICODE)
> compile_obj2 = re.compile(rawstr2,  re.IGNORECASE| re.MULTILINE|
> re.VERBOSE | re.UNICODE)
> 
> liste = self.compile_obj.findall(side.read())
> 
> liste = self.compile_obj2.findall(side.read())
> 
> It works like a dream getting the first info, but the second doesn't work.
> The instance is empty.
> 

That's because you read all of it and passed it to the first regex.

Change to:

side = urlopen("http://www.website.no").read()

then:

liste = compile_obj.findall(side)
liste = compile_obj2.findall(side)

That reads the site's contents once, then you can do whatever you want
with it in your program. I'm not sure why you had the self. reference to
compile_obj, so mix to fit your circumstances :)

Brian

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