Fab86 wrote:
On Mar 4, 2:49 pm, MRAB <goo...@mrabarnett.plus.com> wrote:
Fab86 wrote:
On Mar 4, 1:40 am, "Gabriel Genellina" <gagsl-...@yahoo.com.ar> wrote:
En Tue, 03 Mar 2009 23:11:30 -0200, Fab86 <fabien.h...@gmail.com> escribió:
On Mar 4, 12:00 am, MRAB <goo...@mrabarnett.plus.com> wrote:
Fab86 wrote:
On Mar 3, 8:59 pm, "Gabriel Genellina" <gagsl-...@yahoo.com.ar> wrote:
How to "spell" exactly the exception name should appear in the
documentation; might be yahoo.SearchError, or
yahoo.search.SearchError, or
yahoo.errors.SearchError, or similar.
I have been trying except SearchError: however I get the error:
Traceback (most recent call last):
File "C:\Downloads\MoS\yws-2.12\Python\pYsearch-3.1\timeDelay.py",
line 19, in <module>
except SearchError:
NameError: name 'SearchError' is not defined
I have searched all documents for terms along the lines of searcherror
but am finding nothing..
It's defined in the module you imported to get the search functionality.
I imported:
from yahoo.search.web import WebSearch
However there is nothing re SearchError in that doc or in the .py.
I can only find a reference to SearchError in the __init__ file as a
class called SearchError
The __init__.py indicates a package
<http://docs.python.org/tutorial/modules.html#packages>
You didn't tell the package name (the name of the directory containing
__init__.py) so this is somewhat generic. If the package name is foo, use:
from foo import SearchError
If foo is a subpackage under bar, use:
from bar.foo import SearchError
It *might* be:
from yahoo.search.web import WebSearch
or perhaps:
from yahoo.search import WebSearch
You can enter those lines in the interactive interpreter to discover the
right form. (This really ought to have been documented)
--
Gabriel Genellina
Ok, I managed to import the correct error class (was in a non expected
place)
Just as I thought I was finished, I encountered a final problem. I am
running a while loop which is constantly adding search results to a
file, like this (print >> f, res.total_results_available). I have put
an exception in that if it times out, it simply tries again until its
finished. The problem is that the loop re-write all new results
continuing on from the previous searches. I would like to somehow
delete all in that file and start again.
I thought this could simply be achieved by putting f.close() in the
exception and then it re-writes it however I am getting this error:
Traceback (most recent call last):
File "/home/csunix/scs5fjnh/FYProj/Python/pYsearch-3.1/test9.py",
line 17, in <module>
print >> f, res.total_results_available
ValueError: I/O operation on closed file
Is there another way rather than closing the file? Is it possible to
delete all within the file?
You could do:
f.seek(0)
f.truncate()
I hope you don't just discard all the results you've got so far and then
start from the beginning again.
MRAB, yes I do, thats the only way I can I get it to work. I wouldnt
know how to make the program read the expection and then carry of
from the last search term.
Is that even possible?
Your code looks something like this:
srch = WebSearch(app_id=YahooKey)
for lang in langs:
srch.query = "avoir site:.%s" % lang
res = srch.parse_results()
print >> f, res.total_results_available
The exception is raise by, I think, srch.parse_results(), so you could
do something like this:
srch = WebSearch(app_id=YahooKey)
for lang in langs:
srch.query = "avoir site:.%s" % lang
# Use a loop in case we need to try again.
while True:
try:
res = srch.parse_results()
except SearchError:
# Failed. Wait a while before trying again.
time.sleep(SLEEP_IN_SECONDS)
else:
# No exception, so we have the results.
break
print >> f, res.total_results_available
I'm assuming that you can re-use the WebSearch instance for repeated
queries even if it raised the SearchError exception.
If not, just put another srch = WebSearch(app_id=YahooKey) line after
the sleep to create a new WebSearch instance.
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