@verbose
def read_cov(fname, verbose=None):
    check_fname(fname, 'covariance', ('-cov.fif', '-cov.fif.gz'))
    f, tree = fiff_open(fname)[:2]
    with f as fid:
        return Covariance(**_read_cov(fid, tree, FIFF.FIFFV_MNE_NOISE_COV,
                                      limited=True))


###############################################################################
# Estimate from data
Read a noise covariance from a FIF file.
dataset/ETHPy150Open mne-tools/mne-python/mne/cov.py/read_cov