title: Can I "force_list" more than one parameter in xmltodict?
body: <p>I am calling a web API in Python, getting data back in XML, converting the response into a dictionary using xmltodict, but for several elements, sometimes I get a dictionary (single element) and sometimes I get a list (multiple elements) in response.</p>
  <p>I first started to use &quot;if isinstance(..., dict):&quot; - that could solve my problem but is not so elegant and requires quite some lines of code in my case.
  I then found out &quot;force_list&quot; which I think is exactly what I need, but I need to apply it to several elements and I can't find the right syntax - I'm not even sure if that's possible.</p>
  <h1>The code I am trying to make work:</h1>
  <p>response = xmltodict.parse(xml, force_list=({'Child'},{'Brother'}))</p>
  <p>With force_list={'Child'} only, the code works as expected.
  With the above code, I do not get any error message but when checking the result with the &quot;type&quot; function, I still have dictionaries where I would expect to get lists.
  I tried other syntax and got error messages.</p>