title: PYmssql python connection string
body: <p>I have downloaded Pymssql to connect to the sqlserver db but the connection string is throwing error-pymssql.connect(pymssql.c.:7990)</p>
  
  <pre><code>import pymssql
  pymssql.connect(host='username\SQLEXPRESS',user='username',password='pwd',database='master')
  </code></pre>
  
  <p>Anyone had luck connecting to the sqlserver?</p>
  
  <pre><code>Error:
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "pymssql.pyx", line 556, in pymssql.connect (pymssql.c:7990)
      raise OperationalError(e[0])
  pymssql.OperationalError: (20009, 'Net-Lib error during Unknown error')
  </code></pre>