exploring_stanza_8.py

def sentiment_descriptor(sentence):
    """
    - Parameters: sentence (a Stanza Sentence object)
    - Returns: A string descriptor for the sentiment value of sentence.
    """
    sentiment_value = sentence.sentiment
    if (sentiment_value == 0):
        return "negative"
    elif (sentiment_value == 1):
        return "neutral"
    else:
        return "positive"

print(sentiment_descriptor(moby_p1.sentences[0]))

# neutral

def sentence_sentiment_df(doc):
    """
    - Parameters: doc (a Stanza Document object)
    - Returns: A Pandas DataFrame with one row for each sentence in doc,
      and columns for the sentence text and sentiment descriptor.
    """
    rows = []
    for sentence in doc.sentences:
        row = {
            "text": sentence.text,
            "sentiment": sentiment_descriptor(sentence)
        }
        rows.append(row)
    return pd.DataFrame(rows)

sentence_sentiment_df(moby_p1)

#   text                                                sentiment
# 0 Call me Ishmael.                                    neutral
# 1 Some years ago—never mind how long precisely—h...   neutral
# 2 It is a way I have of driving off the spleen a...   neutral
# 3 Whenever I find myself growing grim about the ...   negative
# 4 This is my substitute for pistol and ball.          neutral
# 5 With a philosophical flourish Cato throws hims...   neutral
# 6 There is nothing surprising in this.                neutral
# 7 If they but knew it, almost all men in their d...   neutral