nltk bigrams

1>>> import nltk
2>>> from nltk.tokenize import word_tokenize
3>>> text = "to be or not to be"
4>>> tokens = nltk.word_tokenize(text)
5>>> bigrm = nltk.bigrams(tokens)
6>>> print(*map(' '.join, bigrm), sep=', ')
7to be, be or, or not, not to, to be

1bigrm = list(nltk.bigrams(text.split()))