title: can only concatenate str (not "tuple") to str? How to get rid of tuple
body: <p>I have this project for uni and I am sure my question is dumb, but I am no programmer and I really can't fix it, even though I read most questions on this topic. 
  This is my code:</p>
  
  <pre><code>        sql_cmd = "SELECT Offer.FirstName, Offer.PhoneNumber, Offer.PostCode, Offer.Product FROM Offer "
          Offer_from_db = executeSQLCommand (sql_cmd)
          Offer_table_html_string = ""
  
          for offer_record in Offer_from_db:
              Product = offer_record [0]
              Name = offer_record [1]
              PhoneNumber = offer_record [2]
              PostCode = offer_record [3]
  
  
              Offer_table_html_string += "&lt;tr&gt;" + "&lt;td&gt;" + str (Product) + "&lt;/td&gt;","&lt;td&gt;"+ str(Name) +"&lt;/td&gt;" ,"&lt;td&gt;"+  str (PhoneNumber) +" &lt;/td&gt;", "&lt;td&gt;"+ str (PostCode) +" &lt;/td&gt;"
  </code></pre>
  
  <p>My error log says </p>
  
  <pre><code>Error running WSGI application
  TypeError: can only concatenate str (not "tuple") to str
  File "/var/www/davidds_pythonanywhere_com_wsgi.py", line 505, in application
  Offer_table_html_string += "&lt;tr&gt;" + "&lt;td&gt;" +  str (Product) + "&lt;/td&gt;","&lt;td&gt;"+  str (Name) +"&lt;/td&gt;" ,"&lt;td&gt;"+  str (PhoneNumber) +" &lt;/td&gt;", "&lt;td&gt;"+  str (PostCode) +" &lt;/td&gt;"
  </code></pre>
  
  <p>I also tried:
  <code>Product = str (offer_record [0]) but it didn't work. Please help!</code></p>