Dutch-language extractive text summarization tool. Almost everything was ripped out of Gensim's amazing English language extractive summarization tool; they deserve the lion's share of the credit and you can visit the relevant doc from their API here.

from samenvattr import summarize

article = "...some text..."
summarize(article, word_count=100)

Of course, you can use a word count of your choice. What's returned are the most important sentences, in order, concatenated with a newline in between. It's a bit sensitive to whitespace characters, so it's a good idea to run your article through this function first before passing it to summarize:

def preprocess_text(text):
    import re
    text = re.sub(r'\n|\r|\t', ' ', text)
    text = re.sub(r'\s+', ' ', text)
    return text

There are a few important changes:

• this is Python 3-only
• the English lemmatizer from Pattern was swapped out with the Dutch version in Pattern3
• the English stopword list was swapped out with a Dutch list; my source was Stopwords ISO
• the English Porter stemmer was swapped out with nltk's Dutch snowball stemmer
• most code and tests relating to non-summarization corners of the API were ripped out

• rip out all of the functionality that doesn't relate to summarization
• evaluate whether the sentence segmentation and abbreviation regexes in utils.py are sufficient for Dutch, and if not look at spaCy-based solutions
• go over the code again to make sure there aren't any unnecessary Python 2-compatibility checks
• I just realized that all of the tests assume the input is English, so I'll have to come up with some Dutch test data