title: python 2.7 TypeError: bad operand type for unary +: 'str'
body: <p>this is my code</p>
  
  <pre><code>message = "From: %s\r\n" % fromaddr
          + "To: %s\r\n" % toaddrs
          + "CC: %s\r\n" % ",".join(cc)
          + "Subject: %s\r\n" % message_subject
          + "\r\n" 
          + msg
  </code></pre>
  
  <p>i am getting this error:</p>
  
  <pre><code>    + "To: %s\r\n" % toaddrs
  TypeError: bad operand type for unary +: 'str'
  </code></pre>
  
  <p>may you help please</p>