All files must be written to be run with Python3.

You can run test files with: $ nosetests3 test

All tests is running for me.

Chapter 1: Computing with Language: Texts and Words

• test/test_corpus.py
• file:test/test_bigrams_trigrams.py

Chapter 2: Accessing Text Corpora and Lexical Resources

• file:test/test_stopwords.py
• file:test/test_tokenize.py

Chapter 3: Processing Raw Text