<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def attributes(self):
 """Get attributes stored in the Booster as a dictionary. Returns ------- result : dictionary of attribute_name: attribute_value pairs of strings. Returns an empty dict if there's no attributes. """

        length = c_bst_ulong()
        sarr = ctypes.POINTER(ctypes.c_char_p)()
        _check_call(_LIB.XGBoosterGetAttrNames(self.handle,
                                               ctypes.byref(length),
                                               ctypes.byref(sarr)))
        attr_names = from_cstr_to_pystr(sarr, length)
        return {n: self.attr(n) for n in attr_names}