Update preprocess/tools/g2p.py

preprocess/tools/g2p.py

@@ -1,4 +1,19 @@
 import re
+import sys
+import nltk
+
+# Ensure NLTK data is available
+try:
+    nltk.data.find('taggers/averaged_perceptron_tagger_eng')
+except LookupError:
+    print("[g2p] Downloading missing NLTK resource: averaged_perceptron_tagger_eng", file=sys.stderr)
+    nltk.download('averaged_perceptron_tagger_eng', quiet=True)
+
+try:
+    nltk.data.find('corpora/cmudict')
+except LookupError:
+    print("[g2p] Downloading missing NLTK resource: cmudict", file=sys.stderr)
+    nltk.download('cmudict', quiet=True)
 
 import ToJyutping
 from g2pM import G2pM