code: def find(self, pattern):
          
  
          if not os.path.exists(environ.index_db):
              raise RuntimeError("can't find index.db")
  
          conn = sqlite3.connect(environ.index_db)
          cursor = conn.cursor()
          selected = cursor.execute(
              'SELECT * FROM "%s" WHERE name '
              'LIKE "%%%s%%" ORDER BY LENGTH(name)'
              % (environ.source, pattern)).fetchall()
  
          pat = re.compile('(%s)' % re.escape(pattern), re.I)
  
          if selected:
              for name, url, std in selected:
                  if os.isatty(sys.stdout.fileno()):
                      print(pat.sub(r'\033[1;31m\1\033[0m', name) +
                            (' \033[1;33m[%s]\033[0m' % std if std else ''))
                  else:
                      print(name + (' [%s]' % std if std else ''))
          else:
              raise RuntimeError('%s: nothing appropriate.' % pattern)
docs: Find pages in database.