title: Random search without cross validation in python/sklearn
body: <p>If you want to do grid search in sklearn <em>without</em> cross validation (what <code>GridSearchCV</code> does), you can apparently use the <code>ParameterGrid</code> class (see here: <a href="https://stackoverflow.com/questions/34624978/is-there-easy-way-to-grid-search-without-cross-validation-in-python">Is there easy way to grid search without cross validation in python?</a>). Does anyone know of a similar method to do random search without CV (i.e. the equivalent of <code>RandomizedSearchCV</code>)?</p>