title: Python unittest's assertDictContainsSubset recommended alternative
body: <p>I have some tests in Python written in unittest. I want to check that some of my dictionaries contain at least certain attributes equal to certain values. If there are extra values, that would be fine. <code>assertDictContainsSubset</code> would be perfect, except that it's deprecated. Is there a better thing that I should be using or should I just recursively assert the contents to be equal if they are in the target dictionary?</p>
  
  <p>The docs recommend using <code>addTypeEqualityFunc</code>, but I do want to use the normal <code>assertEqual</code> for dicts in some cases.</p>