Databases
StackOverflow2013
Postsdbo
POImproving BeautifulSoup Perf
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POImproving BeautifulSoup Perf
    primarykey
    data
    text
    <p>SO I have the following set of code parsing delicious information. It prints data from a Delicious page in the following format</p> <p>Bookmark | Number of People</p> <p>Bookmark | Number of People etc...</p> <p>I used to use the following method to find this info. </p> <pre><code>def extract (soup): links = soup.findAll('a',rel='nofollow') for link in links: print &gt;&gt; outfile, link['href'] hits = soup.findAll('span', attrs={'class': 'delNavCount'}) for hit in hits: print &gt;&gt; outfile, hit.contents #File to export data to outfile = open("output.txt", "w") #Browser Agent br = Browser() br.set_handle_robots(False) br.addheaders = [('User-agent', 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.1) Gecko/2008071615 Fedora/3.0.1-1.fc9 Firefox/3.0.1')] url= "http://www.delicious.com/asd" page = br.open(url) html = page.read() soup = BeautifulSoup(html) extract(soup) </code></pre> <p>But the problem was that some bookmarks didnt have a number of people, so I decided to parse it different so that I would get the data concurrently and print out the bookmarks and number of people side by side. </p> <p>EDIT: Got it from 15 - 5 seconds with this updated version, any more suggestions</p> <pre><code>def extract (soup): bookmarkset = soup.findAll('div', 'data') for bookmark in bookmarkset: link = bookmark.find('a',) vote = bookmark.find('span', 'delNavCount') try: print &gt;&gt; outfile, link['href'], " | " ,vote.contents except: print &gt;&gt; outfile, "[u'0']" #print bookmarkset #File to export data to outfile = open("output.txt", "w") #Browser Agent br = Browser() br.set_handle_robots(False) br.addheaders = [('User-agent', 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.1) Gecko/2008071615 Fedora/3.0.1-1.fc9 Firefox/3.0.1')] url= "http://www.delicious.com/asd" page = br.open(url) html = page.read() soup = BeautifulSoup(html) extract(soup) </code></pre> <p>The performance on this is terrible though, takes 17 secs to parse the first page, and around 15 secs thereafter on a pretty decent machine. It significantly degraded when going from the first bit of code to the second bit. Is there anything I can do to imporve perf here?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USvarunsrin
    1. USvarunsrin
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POImproving BeautifulSoup Perf
      1. This table or related slice is empty.
      1. VTUpMod
    1. CONote also that `class` is the second positional argument with `find`/`findAll`, so you could do `soup.find('div', 'data')` and `bookmark.findAll('span', 'delNavCount')`.
      singulars
      1. POImproving BeautifulSoup Perf
      1. USChris Morgan
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload