title: sqlalchemy: connect to MySQL without password
body: <p>I have MySQL base "test" with no password on root. I can log in there</p>
  
  <pre><code>mysql -uroot test # all fine
  </code></pre>
  
  <p>I want to access it with <code>sqlalchemy</code>. I try with those URLs:</p>
  
  <pre><code>mysql+mysqldb://root@localhost/test
  
  mysql+mysqldb://root:@localhost/test
  </code></pre>
  
  <p>But both of them fail with error:</p>
  
  <pre><code>sqlalchemy.exc.OperationalError: (OperationalError)
      (1045, "Access denied for user
      'root'@'localhost' (using password: NO)") None None
  </code></pre>
  
  <p>How should I access the base without a password?</p>
  
  <p><strong>Edit</strong></p>
  
  <p>I tried also:</p>
  
  <pre><code>mysql://root@/test
  mysql+mysqldb://root@/test
  </code></pre>
  
  <p>With a local dummy account <em>with</em> password, it works without problems.</p>