"""This is "nester.py" module, and it provides one function called
print_lol() which prints list which may or may not include nested lists. """
def print_lol(the_list, level=0 ):
    """ This function takes a positional argument called "the_list", which
    is any python list (of, possibly , nested lists). Each data item in the
    provided list is (recursively) printed to the screen on its own line.
    A second argument called "level" is used to insert tab-stops when
    a nested list is encountered"""
    for each_item in the_list:
        if isinstance(each_item, list):
            print_lol(each_item, level+1)
        else:
            for tab_stop in range(level):
                print("\t", end='')
            print(each_item)
            
