Fooocus Prompt Expansion (#329)

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modules/expansion.py

@@ -0,0 +1,23 @@
+import torch
+from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline, set_seed
+from modules.path import fooocus_expansion_path
+
+
+class FooocusExpansion:
+    def __init__(self):
+        self.tokenizer = AutoTokenizer.from_pretrained(fooocus_expansion_path)
+        self.model = AutoModelForCausalLM.from_pretrained(fooocus_expansion_path)
+        self.pipe = pipeline('text-generation',
+                             model=self.model,
+                             tokenizer=self.tokenizer,
+                             device='cpu',
+                             torch_dtype=torch.float32)
+        print('Fooocus Expansion engine loaded.')
+
+    def __call__(self, prompt, seed):
+        prompt = str(prompt).rstrip('\n')
+        seed = int(seed)
+        set_seed(seed)
+        response = self.pipe(prompt, max_length=len(prompt) + 256)
+        result = response[0]['generated_text'].rstrip('\n')
+        return result