human
Solve the following python programming problem given the following code:
def _tgrep_exprs_action(_s, _l, tokens) : 
    '
    This is the top-lebel node in a tgrep2 search string.
the
    predicate function it returns binds together all the state of a
    tgrep2 search string.

    Builds a lambda function representing a predicate on a tree node
    from the disjunction of several tgrep expressions.  Also handles
    macro definitions and macro name binding, and node label
    definitions and node label binding.
    ' 
    if (len (tokens) == 1) : 
        return (lambda n, m = None, l = None : tokens [0] (n, None, { 
            
})) 
tokens = [x for x in tokens if (x != ';')] 
    macro_dict = { 
        
} 
    macro_defs = [tok for tok in tokens if isinstance (tok, dict)] 
    for macro_def in macro_defs : 
        macro_dict.update (macro_def) 
tgrep_exprs = [tok for tok in tokens if (not isinstance (tok, dict))] 
    def top_level_pred(n, m = macro_dict, l = None) : 
        label_dict = { 
            
} 
        return any ((predicate (n, m, label_dict) for predicate in tgrep_exprs)) 
return macro_dict 

    
    

    Fix the buggy line: return macro_dict
assistant
#Here is Python program to fix the buggy line: return macro_dict
.

return def top_level_pred(