human
Can you provide a the Python program you requested given the following:
Complete the below
@ensure_csrf_cookie
@cache_control(no_cache=True, no_store=True, must_revalidate=True)
@coach_dashboard
def save_ccx(request, course, ccx=None):

    ''''Save changes to CCX.'
    '''
assistant
#Here is the Python program you requested.
    if (not ccx):
        raise Http404
    def override_fields(parent, data, graded, earliest=None, ccx_ids_to_delete=None):
        '\n                                Recursively    apply    CCX    schedule    data    to    CCX    by    overriding    the\n                                `visible_to_staff_only`,    `start`    and    `due`    fields    for    units    in    the\n                                course.\n                                '
        if (ccx_ids_to_delete is None):
            ccx_ids_to_delete = []
        blocks = {str(child.location): child for child in parent.get_children()}
        for unit in data:
            block = blocks[unit['location']]
            override_field_for_ccx(ccx, block, 'visible_to_staff_only', unit['hidden'])
            start = parse_date(unit['start'])
            if start:
                if ((not earliest) or (start < earliest)):
                    earliest = start
                override_field_for_ccx(ccx, block, 'start', start)
            else:
                ccx_ids_to_delete.append(get_override_for_ccx(ccx, block, 'start_id'))
                clear_ccx_field_info_from_ccx_map(ccx, block, 'start')
            if ('due' in unit):
                due = parse_date(unit['due'])
                if due:
                    override_field_for_ccx(ccx, block, 'due', due)
                else:
                    ccx_ids_to_delete.append(get_override_for_ccx(ccx, block, 'due_id'))
                    clear_ccx_field_info_from_ccx_map(ccx, block, 'due')
            else:
                ccx_ids_to_delete.append(get_override_for_ccx(ccx, block, 'due_id'))
                clear_ccx_field_info_from_ccx_map(ccx, block, 'due')
            if ((not unit['hidden']) and block.graded):
                graded[block.format] = (graded.get(block.format, 0) + 1)
            children = unit.get('children', None)
            if (unit.get('category', None) == u'vertical'):
                for component in block.get_children():
                    if start:
                ...