def __init__(self,dset=None):
        '''if ``dset`` is given, will automatically be loaded'''
        self.dset_filename = dset
        self.data = None
        self.header = None
        if dset:
            self.load(dset)
def __init__ ( self , dset = None ) : self . dset_filename = dset self . data = None self . header = None if dset : self . load ( dset )
if ``dset`` is given, will automatically be loaded