<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def execute(self, input_data):

        ''' Process the input bytes with pefile '''
        raw_bytes = input_data['sample']['raw_bytes']

        # Have the PE File module process the file
        pefile_handle, error_str = self.open_using_pefile('unknown', raw_bytes)
        if not pefile_handle:
            return {'error': error_str, 'dense_features': [], 'sparse_features': []}

        # Now extract the various features using pefile
        dense_features, sparse_features = self.extract_features_using_pefile(pefile_handle)

        # Okay set my response
        return {'dense_features': dense_features, 'sparse_features': sparse_features, 'tags': input_data['tags']['tags']}