bugGNU FM - Bugs: bug #32936, lastscrape: BeautifulSoup fails to...


bug #32936: lastscrape: BeautifulSoup fails to parse last.fm pages

Submitted by:  Petr Viktorin <encukou>
Submitted on:  Mon 28 Mar 2011 01:16:45 PM UTC  
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

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Sun 09 Oct 2011 08:39:07 AM UTC, comment #2:

I was getting the following error using the patch:
"UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 238: ordinal not in range(128)"
So I replaced the following line:
contents = contents.replace(u'<!–[if IE]><![endif]–>', '')
contents = contents.replace('<!–[if IE]><![endif]–>', '')

Stephen Niedzielski <niedzielski>
Mon 28 Mar 2011 01:57:26 PM UTC, comment #1:

The problem is caused by a weird comment: <!–[if IE]><![endif]–> (with en-dashes instead of two hyphen-minuses) on line 9 of every last.fm page. Removing this no-op comment makes everything work again.

I believe the attached patch is trivial enough so you can accept it without a copyright assignment. (And if not, it's trivial to write from scratch.)

I filed a bug in BeautifulSoup at https://bugs.launchpad.net/beautifulsoup/+bug/744278 – if that gets fixed no workarounds are necessary.

Also, BeautifulSoup 3.2 works. Lastscrape's README should be updated accordingly.

(file #23036)

Petr Viktorin <encukou>
Mon 28 Mar 2011 01:16:45 PM UTC, original submission:

Apparently, last.fm made a subtle change to their pages that prevents BeautifulSoup from parsing the scrobbles correctly.

librefm/trunk/lastscrape$ ./lastscrape.py encukou lastfm_dump.txt
Traceback (most recent call last):
File "./lastscrape.py", line 98, in <module>
File "./lastscrape.py", line 89, in main
for artist, track, timestamp in fetch_tracks(args[1]):
File "./lastscrape.py", line 75, in fetch_tracks
for artist, track, timestamp in tracks:
File "./lastscrape.py", line 34, in parse_page
for row in soup.find('table', 'candyStriped tracklist').findAll('tr'):
AttributeError: 'NoneType' object has no attribute 'findAll'

(on a side note, BeautifulSoup 3.2 has been out for some while; it might make sense to tell users to use that instead of the 3.0.7a if it's made to work)

Petr Viktorin <encukou>


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Attach File(s):

Attached Files
file #23036:  lastscrape.diff added by encukou (1KiB - text/x-patch)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -unavailable- added by niedzielski (Posted a comment)
  • -unavailable- added by encukou (Submitted the item)

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    Follows 1 latest change.

    Date Changed By Updated Field Previous Value => Replaced By
    Mon 28 Mar 2011 01:57:26 PM UTCencukouAttached File-=>Added lastscrape.diff, #23036

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