code: def housenumber(self):
      if self.address:
          expression = r"\d+"
          pattern = re.compile(expression)
          match = pattern.search(self.address)
          if match:
              return int(match.group(0))
  
file_path: geocoder/geocoder/ottawa.py
imports: from __future__ import absolute_import
  import logging
  import re
  from geocoder.base import OneResult, MultipleResultsQuery
label_desc: Use image node_id 4 for calling the OttawaResult obj's underlying member method code with example usage: obj.housenumber() and returns: int