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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_reader_instances(self, filenames=None, reader=None, reader_kwargs=None):
 """Find readers and return their instances."""

        return load_readers(filenames=filenames,
                            reader=reader,
                            reader_kwargs=reader_kwargs,
                            ppp_config_dir=self.ppp_config_dir)