<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pckfrm(pck, ids):
 """ Find the set of reference frame class ID codes of all frames in a specified binary PCK file. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/pckfrm_c.html :param pck: Name of PCK file. :type pck: str :param ids: Set of frame class ID codes of frames in PCK file. :type ids: SpiceCell """

    pck = stypes.stringToCharP(pck)
    assert isinstance(ids, stypes.SpiceCell)
    assert ids.dtype == 2
    libspice.pckfrm_c(pck, ctypes.byref(ids))