def recursive_list_sum(data_list):  
    total = 0  
    for element in data_list:  
        if type(element) == type([]):  
            total = total + recursive_list_sum(element)  
        else:  
            total = total + element  
  
    return total  
print( recursive_list_sum([1, 2, [3,4],[5,6]]))