def is_a(file_name):
"""
Tests whether a given file_name corresponds to a Cosmo Skymed file. Returns a reader instance, if so.
Parameters
----------
file_name : str|BinaryIO
the file_name to check
Returns
-------
CSKReader|None
`CSKReader` instance if Cosmo Skymed file, `None` otherwise
"""
if is_file_like(file_name):
return None
if not is_hdf5(file_name):
return None
if h5py is None:
return None
try:
csk_details = CSKDetails(file_name)
logging.info('File {} is determined to be a Cosmo Skymed file.'.format(
file_name))
return CSKReader(csk_details)
except SarpyIOError:
return None
def is_a(file_name):
"""
Tests whether a given file_name corresponds to a NISAR file. Returns a reader instance, if so.
Parameters
----------
file_name : str|BinaryIO
the file_name to check
Returns
-------
NISARReader|None
`NISARReader` instance if NISAR file, `None` otherwise
"""
if is_file_like(file_name):
return None
if not is_hdf5(file_name):
return None
if h5py is None:
return None
try:
nisar_details = NISARDetails(file_name)
logger.info('File {} is determined to be a NISAR file.'.format(file_name))
return NISARReader(nisar_details)
except (ImportError, SarpyIOError):
return None