How to use the pyedflib._extensions._pyedflib.CyEdfReader function in pyEDFlib

from ._extensions._pyedflib import CyEdfReader

__all__ = ['EdfReader', 'DO_NOT_READ_ANNOTATIONS',
           'READ_ANNOTATIONS', 'READ_ALL_ANNOTATIONS', 'CHECK_FILE_SIZE',
           'DO_NOT_CHECK_FILE_SIZE', 'REPAIR_FILE_SIZE_IF_WRONG']

DO_NOT_READ_ANNOTATIONS = 0
READ_ANNOTATIONS = 1
READ_ALL_ANNOTATIONS = 2

CHECK_FILE_SIZE = 0
DO_NOT_CHECK_FILE_SIZE = 1
REPAIR_FILE_SIZE_IF_WRONG = 2


class EdfReader(CyEdfReader):
    """
    This provides a simple interface to read EDF, EDF+, BDF and BDF+ files.
    """
    def __enter__(self):
        return self

    def __del__(self):
        self._close()

    def __exit__(self, exc_type, exc_val, ex_tb):
        self._close()  # cleanup the file

    def close(self):
        """
        Closes the file handler
        """