urllib2 - iteration over non-sequence

Gary Herron gherron at islandtraining.com
Sun Jun 10 01:31:53 CEST 2007


rplobue at gmail.com wrote:
> Thanks for the reply Larry but I am still having trouble.  If i
> understand you correctly, your are just suggesting that i add an http://
> in front of the address?  However when i run this:
>
>   
>>>> import urllib2
>>>> site = urllib2.urlopen('http://www.google.com')
>>>> for line in site:
>>>>      print line
>>>>         
>
> I am still getting the message:
>
> TypeError: iteration over non-sequence
>   File "<stdin>", line 1
>     TypeError: iteration over non-sequence
>   
Newer version of Python are willing to implement an iterator that
*reads* the contents of a file object and supplies the lines to you
one-by-one in a loop.  However, you explicitly said the version of
Python you are using, and that predates generators/iterators. 

So... You must explicitly read the contents of the file-like object
yourself, and loop through the lines you self.  However, fear not --
it's easy.   The socket._fileobject object provides a method "readlines"
that reads the *entire* contents of the object, and returns a list of
lines.  And you can iterate through that list of lines.  Like this:

import urllib2 
url = urllib2.urlopen('http://www.google.com')
for line in url.readlines():
  print line
url.close()


Gary Herron

 







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