human
Can you provide a the Python program you requested given the following:
Complete the below
def _generate_dispatch(cls):

    ''''Return an optimized visit dispatch function for the cls
    for use by the compiler.'
    '''
assistant
#Here is the Python program you requested.
    if ('__visit_name__' in cls.__dict__):
        visit_name = cls.__visit_name__
        if isinstance(visit_name, str):
            getter = operator.attrgetter(('visit_%s' % visit_name))
            def _compiler_dispatch(self, visitor, **kw):
                try:
                    meth = getter(visitor)
                except AttributeError:
                    raise exc.UnsupportedCompilationError(visitor, cls)
                else:
                    return meth(self, **kw)
        else:
            def _compiler_dispatch(self, visitor, **kw):
                visit_attr = ('visit_%s' % self.__visit_name__)
                try:
                    meth = getattr(visitor, visit_attr)
                except AttributeError:
                    raise exc.UnsupportedCompilationError(visitor, cls)
                else:
                    return meth(self, **kw)
        _compiler_dispatch.__doc__ = 'Look    for    an    attribute    named    "visit_"    +    self.__visit_name__\n                                                on    the    visitor,    and    call    it    with    the    same    kw    params.\n                                                '
        cls._compiler_dispatch = _compiler_dispatch