'''
this a output module
provide function print_lol(),which can print out item of
a list/ multi-layer list, 
'''
def print_lol(the_list):
    '''
the_list is data of list type,it can be any kinds of list
multi-layer/single-layer. each element will be print onto screen
'''
    for item in the_list:
        if isinstance(item,list):
            print_lol(item)
        else:
            print(item)

