Store references to the resulting spacy doc and list of phrases as more transparent attributes.

[andrewrosss]

The use-case would be something like:

text = "If your application contains a large number of form groups, we recommend building a higher-level component encapsulating a complete field group that renders the label, the control, and any other necessary components."

r = Rake()
print(r.doc)  #prints None
print(r.phrases)  #prints None

ranklist = r.extract_keywords_from_text(text)
print(r.doc)  # prints the input text
print(r.phrases)  # prints the result of r.phrase_fn(doc)