blob = TextBlob(str(df['Review Text']))
pos_df = pd.DataFrame(blob.tags, columns = ['word' , 'pos'])
pos_df = pos_df.pos.value_counts()[:20]
pos_df.iplot(
    kind='bar',
    xTitle='POS',
    yTitle='count',
    title='Top 20 Part-of-speech tagging for review corpus')