Python Script to Search PirateBay

I've written a very basic Python 3 script to search ThePirateBay. Since the tracker doesn't have an API, I had to parse the HTML using BeautifulSoup. I'd like to get some reviews, I'm pretty sure the code is crap, so fire away. I'm also interested in projects I could read to improve my Python.

```
#!/usr/bin/env python3

from urllib.parse import quote
from urllib.request import urlopen
from bs4 import BeautifulSoup
from constants import *
import re
import webbrowser

class Torrent:
def __str__(self):
return "(%s / %s) (%s) (%s) (%d SE / %d LE) %s" % (self.category,
self.subcategory,
self.size,
self.date,
self.seeders,
self.leeches,
self.name)

def download(self):
webbrowser.open(self.magnet, autoraise=False)

def search(keywords, categories=[ALL, ], order=SEED_DESC):
url = '%s/search/%s/0/%d/%s' % (TPB_DOMAIN, quote(keywords), order,
','.join([str(x) for x in categories]))
return parse(url)

def parse(url):
META_REGEX_FORMAT = "Uploaded (.), Size (.), ULed by (.*)"
UNICODE_BLANK = '\xa0'
BLANK = ' '
ROWS = 'tr'
DATA = 'td'

soup = BeautifulSoup(urlopen(url).read())
torrents = []

for result in soup.find_all(ROWS)[1:]:
torrent = Torrent()
data = result.find_all(DATA)

a = data[0].find_all('a')
torrent.category = a[0].string
torrent.subcategory = a[1].string

a = data[1].find_all('a')
torrent.link = a[0]['href']
torrent.name = a[0].string
torrent.magnet = a[1]['href']

torrent.user = data[1].font.a
if torrent.user is not None:

By reading the code the only thing i could
thought to improve your code is to change this

def search_engine():
    try:
        pattern = re.compile('"(.+)" \-(.*) \-(.*)')
        while True:
                kw, cat, order = get_query(pattern)

and this one

def get_query(pattern):
    text = input("Search: ")
    m = pattern.match(text)

So you won't have to compile your regex each time

StackExchange Code Review Q#36909, answer score: 2