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__init__.py

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+import os
+
+# Define the local assets path matching our self-contained structure
+NODE_DIR = os.path.dirname(os.path.abspath(__file__))
+LISTS_DIR = os.path.join(NODE_DIR, "lists")
+
+class ComfyUIDynamicDropdownsPlaceholder:
+    @classmethod
+    def INPUT_TYPES(cls):
+        # Fallback values if the user hasn't populated their text files yet
+        styles = ["Amateur Candid", "Studio Cinematic", "Vintage Film"]
+        lighting = ["Soft Natural", "Harsh Neon", "Golden Hour"]
+
+        # Dynamically load from files if they exist
+        style_path = os.path.join(LISTS_DIR, "demo_style.txt")
+        if os.path.exists(style_path):
+            with open(style_path, "r", encoding="utf-8") as f:
+                styles = [line.strip() for line in f if line.strip()]
+
+        lighting_path = os.path.join(LISTS_DIR, "demo_lighting.txt")
+        if os.path.exists(lighting_path):
+            with open(lighting_path, "r", encoding="utf-8") as f:
+                lighting = [line.strip() for line in f if line.strip()]
+
+        return {
+            "required": {
+                "clip": ("CLIP",),
+                "demo_style": (styles,),
+                "demo_lighting": (lighting,),
+            }
+        }
+
+    RETURN_TYPES = ("STRING", "CONDITIONING")
+    RETURN_NAMES = ("PROMPT_STRING", "CONDITIONING")
+    FUNCTION = "process_prompt"
+    CATEGORY = "Custom Selection"
+
+    def process_prompt(self, clip, demo_style, demo_lighting):
+        # Concatenate the dropdown choices into a raw comma-separated string
+        clean_choices = [str(demo_style).strip(), str(demo_lighting).strip()]
+        final_prompt = ", ".join([c for c in clean_choices if c])
+
+        # Core execution logic tokenizing the text directly into CLIP conditioning data
+        tokens = clip.tokenize(final_prompt)
+        cond, pooled = clip.encode_from_tokens(tokens, return_pooled=True)
+        conditioning_output = [[cond, {"pooled_output": pooled}]]
+
+        return (final_prompt, conditioning_output)
+
+NODE_CLASS_MAPPINGS = {
+    "ComfyUI_Dynamic_Dropdowns_Demo": ComfyUIDynamicDropdownsPlaceholder
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "ComfyUI_Dynamic_Dropdowns_Demo": "🎭 Dynamic Dropdowns (Demo Mode)"
+}