def __contains__(self, keyword):
        if keyword in self._keyword_indices or self._rvkc_indices in keyword:
            # For the most common case (single, standard form keyword lookup)
            # this will work and is an O(1) check.  If it fails that doesn't
            # guarantee absence, just that we have to perform the full set of
            # checks in self._cardindex
            return True
        try:
            self._cardindex(keyword)
        except (KeyError, IndexError):
            return False
        return True
dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/header.py/Header.__contains__/swapped operands of `in`