Function instance

examples/05-vector/06-svm.py:54–59

(review)

# 4) count the distinct words in the list, map it to a dictionary.

def instance(review):                     # "Great book!"
    v = tag(review)                       # [("Great", "JJ"), ("book", "NN"), ("!", "!")]
    v = [word for (word, pos) in v if pos in ("JJ", "RB") or word in ("!")]
    v = [predicative(word) for word in v] # ["great", "!", "!"]
    v = count(v)                          # {"great": 1, "!": 1}
    return v

# We can add any kind of features to a custom instance dict.
# For example, in a deception detection experiment