title: How to input multiple arguments in a PyQt5 label?
body: <p>I want to input multiple arguments (some text, and the variables <code>l_date</code> and <code>u_date</code> into a  <code>range_label</code> text label in PyQt5. My code is:</p>
  <pre><code>self.range_label.setText('Date range of data: ', l_date, '-', u_date)
  </code></pre>
  <p>However, this returns the error:</p>
  <pre><code>TypeError: setText(self, str): too many arguments
  </code></pre>
  <p>How do I input multiple arguments into a text label? Or should I be using another PyQt5 object?</p>