Sentiment analyzis.

setup_nltk.py

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+import nltk
+
+# This will download the 'vader_lexicon' dataset
+# It only needs to be run once
+try:
+    nltk.data.find('sentiment/vader_lexicon.zip')
+    print("VADER lexicon is already downloaded.")
+except LookupError:
+    print("Downloading VADER lexicon...")
+    nltk.download('vader_lexicon')
+    print("Download complete.")