<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _update_const_classes():
 """update constant classes, so the keys of CONST_CLS can be reused"""

    klasses = (bool, int, float, complex, str, bytes)
    for kls in klasses:
        CONST_CLS[kls] = Const