You may import the Generator class to instantiate your generator with your own sample text and a dictionary:
>>> from loremipsum import Generator
>>>
>>> sample = file('data/sample.txt').read()
>>> dictionary = file('data/dictionary.txt').read().split()
>>>
>>> g = Generator(sample, dictionary)
>>> g.generate_sentence() #doctest: +ELLIPSIS
(...)
>>>or just import get_sentences or get_paragraphs which interface to a module wide Generator instance.
>>> from loremipsum import get_paragraphs, get_sentences
>>>
>>> get_sentences(5) #doctest: +ELLIPSIS
['...', '...', '...', '...', '...']
>>> get_paragraphs(3) #doctest: +ELLIPSIS
['...', '...', '...']