from brown import brown_collection
from consts import SN, SN_

def NS(noun):
    """Noun sexiness function
    Returns a real value measure of the maximum similarity
    a `noun not in SN` has to each `noun in SN_`
    """
    # return 10**-7 for nouns that occur less than 200 times
    return brown_collection.tf_idf(noun, SN_)

def AS(adj):
    """Adjective sexiness function
    Returns a real value measure of how likely an adjective `adj`
    is to modify a `noun in SN`.
    """
    # implementation should return relative frequency of adf
    # in sentences in erotica corpus that contain at least
    # one noun in SN
    return 0