human
Solve the following python programming problem given the following code:
def replace_repeat_stochastic(expr, return_memo = False) : 
    nodes = dfs (expr) 
    memo = { 
        
} 
    for (ii, orig) in enumerate (nodes) : 
        if ((orig.name == 'idxs_map') and (orig.pos_args [1]._obj in stoch)) : 
            idxs = orig.pos_args [0] 
            dist = orig.pos_args [1]._obj 
            def foo(arg) : 
                assert (arg.name == 'pos_args') 
                assert (len (arg.pos_args) == 2) 
                arg_vals = arg.pos_args [1] 
                if ((arg_vals.name == 'asarray') and (arg_vals.inputs () [0].name == 'repeat')) : 
                    repeated_thing = arg_vals.inputs () [0].inputs () [1] 
                    return repeated_thing 
else : 
                    if (arg.pos_args [0] is idxs) : 
                        return arg_vals 
else : 
                        raise NotImplementedError () 
new_pos_args = [foo (arg) for arg in orig.pos_args [2 :]] 
            new_named_args = [[aname, foo (arg)] for (aname, arg) in orig.named_args] 
            vnode = Apply (dist, new_pos_args, new_named_args, None) 
            n_times = scope.len (idxs) 
            if ('size' in dict (vnode.named_args)) : 
                raise NotImplementedError ('random node already has size') 
vnode.named_args.append (['size', n_times]) 
            for client in nodes [(ii + 1) :] : 
                client.replace_input (return_memo, vnode) 
if (expr is orig) : 
                expr = vnode 
memo [orig] = vnode 
if return_memo : 
        return (expr, memo) 
else : 
        return expr 

    
    

    Fix the buggy line: client.replace_input (return_memo, vnode)
assistant
#Here is Python program to fix the buggy line: client.

client.replace_input (orig, vnode)