title: How to concatenate Integers and strings in python
body: <p>I am trying to search for a substring with the specify pattern using re library. I wrote a function to do that but end up getting this error: Type Error: cannot concatenate str and integers. Below is my function;</p>
  
  <pre><code>def searchValue(obs, concept):
  try:
      found = re.search('## !!'concept+'=(.+?)!! ##',obs)
  except AttributeError:
      found = 'null'
  return found
  
  obs= '!!1834=7850!! ## !!1915=Patient is awaiting imaging results, then start darcabazine 250 ml every 21 days.!! ## !!1915=Patient is HIV positive since 2016,no presents with pains on the plantar surface and pelvic pain.!! ## !!5096=2013-07-29!! ## !!5219=1068!! ## !!6504=7189!! ## !!6509=6511!! ## !!6575=1107!! ## !!6605=1065!! ## !!7191=MELANOMA OF THE RIGHT HEEL.!! ## !!8723=5622!!'
  bett = searchValue(obs, 1915)
  
  print(bett)
  </code></pre>
  
  <p>Any help will be appreciated.</p>