title: Is there a way to use "assert_called_with" that only checks specific word?
body: <p>I am trying to use <code>assert_called_with</code> to assert the argument that is passed to the mocked object. There is only one argument of that function but the argument is very large.
  <code>{&quot;A&quot;:{&quot;B&quot;: {&quot;C&quot; : {&quot;D&quot;: {&quot;key&quot;: &quot;keyword&quot;, &quot;any&quot;: &quot;aaa&quot;, &quot;anything&quot;: &quot;bbbb&quot;}}}}</code></p>
  <p>I only care about <code>&quot;key&quot;: &quot;keyword&quot;</code> exists and do not care about other stuff, is there a way to do so?</p>