Fix all import issues: use hf_hub_download and create proper Python package structure

app.py

@@ -17,12 +17,12 @@ def load_model():
         print("Loading AbLang2 model...")
         try:
             # First, let's get the model directory and ensure all files are downloaded
-            from transformers import cached_file
+            from huggingface_hub import hf_hub_download
             
             # Download all necessary files
-            adapter_path = cached_file("hemantn/ablang2", "adapter.py")
-            config_path = cached_file("hemantn/ablang2", "configuration_ablang2paired.py")
-            modeling_path = cached_file("hemantn/ablang2", "modeling_ablang2paired.py")
+            adapter_path = hf_hub_download("hemantn/ablang2", "adapter.py")
+            config_path = hf_hub_download("hemantn/ablang2", "configuration_ablang2paired.py")
+            modeling_path = hf_hub_download("hemantn/ablang2", "modeling_ablang2paired.py")
             
             cached_model_dir = os.path.dirname(adapter_path)
             print(f"Model directory: {cached_model_dir}")

requirements.txt

@@ -5,3 +5,4 @@ numpy==1.24.0
 pandas==2.0.0
 einops==0.7.0
 rotary-embedding-torch==0.8.9
+huggingface-hub>=0.19.0