<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_programs_dict():
 """ Builds and returns programs dictionary This will have to import the packages in COLLABORATORS_S in order to get their absolute path. Returns: "packagename" examples: "f311.explorer", "numpy" """

    global __programs_dict

    if __programs_dict is not None:
        return __programs_dict

    d = __programs_dict = OrderedDict()

    for pkgname in COLLABORATORS_S:
        try:
            package = importlib.import_module(pkgname)
        except ImportError:
            # I think it is better to be silent when a collaborator package is not installed
            continue

        path_ = os.path.join(os.path.split(package.__file__)[0], "scripts")
        bulk = a99.get_exe_info(path_, flag_protected=True)
        d[pkgname] = {"description": a99.get_obj_doc0(package), "exeinfo": bulk}

    return __programs_dict