10-16-2011, 01:41 AM | #1 |
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The Economist - past issues
I am trying to modify the current recipe for The Economist so that I can download past issues of the magazine.
This code works perfectly well, but requires the user to modify the recipe each time one wants a different issue: Spoiler:
Now I would like to use the input from the username field to modify INDEX. Something like: Code:
issue = self.username INDEX = 'http://www.economist.com/printedition/%s' % (issue.translate(None,'-')) Any hint on how I can modify INDEX with data from self.username? Would that mean modifying __init__ files? |
10-16-2011, 02:35 AM | #2 |
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In python self refers to an object instantiated from a class, you cannot use it in class level variables. Instead of using it with INDEX, you should replace the use of INDEX in the rest of the recipe.
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10-16-2011, 01:20 PM | #3 | |
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I have tried and it doesn't work. The variable that is called has to be defined in the class Economist. I can't define it later, or else I get an error
Quote:
Global vars don't work either. The "username" variable used in self.username is not available unless inside functions... So I can't use the user input while defining class variables... |
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10-17-2011, 08:43 AM | #4 |
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You can get rid of the class variable INDEX and just use an instance variable. Like this:
Code:
def get_browser(self): self.INDEX = 'http://www.economist.com/printedition/'+self.username return BasicNewsRecipe.get_browser() def get_cover_url(self): br = self.browser br.open(self.INDEX) self.log('Fetching cover for issue: ') date = self.username.replace('-', '') cover_url = "http://media.economist.com/sites/default/files/imagecache/print-cover-full/%s_CNA400.jpg" % date return cover_url |
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