def features_properties_null_remove(obj):
features = obj['<STR_LIT>']<EOL>for i in tqdm(range(len(features))):<EOL><INDENT>if '<STR_LIT>' in features[i]:<EOL><INDENT>properties = features[i]['<STR_LIT>']<EOL>features[i]['<STR_LIT>'] = {p:properties[p] for p in properties if properties[p] is not None}<EOL><DEDENT><DEDENT>return obj<EOL>
Remove any properties of features in the collection that have 
entries mapping to a null (i.e., None) value