human
Solve the following python programming problem given the following code:
def _variance_like(func_name) : 
    func_names = { 
        'sample' : formatter, 
        'pop' : '{0}_pop'.format (func_name), 
} 
    def formatter(translator, expr) : 
        (arg, where, how) = expr.op ().args 
        return _reduction_format (translator, func_names [how], arg, where) 
return formatter 

    
    

    Fix the buggy line: 'sample' : formatter ,
assistant
#Here is Python code to fix the buggy line: 'sample' : formatter ,
.

'sample' : func_name ,