urllib2 - iteration over non-sequence

[rplobue]

im trying to get urllib2 to work on my server which runs python
2.2.1. When i run the following code:
import urllib2
for line in urllib2.urlopen ('www.google.co m'):
print line
i will always get the error:
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: iteration over non-sequence
Anyone have any answers?

[Gabriel Genellina]

En Sun, 10 Jun 2007 02:54:47 -0300, Erik Max Francis <ma*@alcyone.co m>
escribió:

Gary Herron wrote:

>Certainly there's are cases where xreadlines or read(bytecount) are
reasonable, but only if the total pages size is *very* large. But for
most web pages, you guys are just nit-picking (or showing off) to
suggest that the full read implemented by readlines is wasteful.
Moreover, the original problem was with sockets -- which don't have
xreadlines. That seems to be a method on regular file objects.

There is absolutely no reason to read the entire file into memory (which
is what you're doing) before processing it. This is a good example of
the principle of there is one obvious right way to do it -- and it isn't
to read the whole thing in first for no reason whatsoever other than to
avoid an `x`.

The problem is -and you appear not to have noticed that- that the object
returned by urlopen does NOT have a xreadlines() method; and even if it
had, a lot of pages don't contain any '\n' so using xreadlines would read
the whole page in memory anyway.

Python 2.2 (the version that the OP is using) did include a xreadlines
module (now defunct) but on this case it is painfully slooooooooooooo w -
perhaps it tries to read the source one character at a time.

So the best way would be to use (as Paul Rubin already said):

for line in iter(lambda: f.read(4096), ''): print line

--
Gabriel Genellina