Irregular verbs list

irregularverbs.py

#! /usr/bin/python3

import sqlite3
import urllib.request
from bs4 import BeautifulSoup
import sys

def get_verbs(page, verbslist):
  baseurl = "http://pasttenses.com/irregular-verbs-list" + page
  data = urllib.request.urlopen(baseurl)
  soup = BeautifulSoup(data)
  verbs_table = soup.find('table')
  verbs = verbs_table.find_all('tr')
  for verb in verbs:
    i = 0
    k = 0
    tenses = verb.find_all('td')
    forms = {}
    for tense in tenses:
      if i in (0, 3, 4):
        forms[k] = tense.get_text()
        k += 1
      i += 1
    if k > 0:
      verbslist.append(forms)

def get_all_pages():
  verbslist = []
  for i in range(1, 14):
    if i == 1:
      get_verbs("", verbslist)
    else:
      get_verbs("-page%i" % i, verbslist)
  return verbslist

def fill_db(fname):
  conn = sqlite3.connect(fname)
  c = conn.cursor()
  c.execute('CREATE TABLE verbs_en (id INTEGER PRIMARY KEY, infinitive TEXT, past TEXT, participle TEXT);')
  verbslist = get_all_pages()
  for verbs in verbslist:
    c.execute('INSERT INTO verbs_en (infinitive, past, participle) VALUES ("%s", "%s", "%s");' % (verbs[0], verbs[1], verbs[2]))
  conn.commit()
  conn.close()

if len(sys.argv) < 2:
  print("Usage: %s <db_filename>" % sys.argv[0])
  sys.exit(1)
else:
  fill_db(sys.argv[1])