'Initializes internal attributes specific to FITS-isms.'

def _init(self):

    self._nfields = 0
    self._converted = {}
    self._heapoffset = 0
    self._heapsize = 0
    self._col_weakrefs = weakref.WeakSet()
    self._coldefs = None
    self._gap = 0
    self._uint = False
