Resource u'tokenizers/punkt/english.pickle' not found
To add to alvas' answer, you can download only the punkt corpus:
nltk.download('punkt')Downloading all sounds like overkill to me. Unless that's what you want.
If you're looking to only download the punkt model:
import nltknltk.download('punkt')If you're unsure which data/model you need, you can install the popular datasets, models and taggers from NLTK:
import nltknltk.download('popular')With the above command, there is no need to use the GUI to download the datasets.