app.py

from transformers import GPT2LMHeadModel, GPT2Tokenizer

model_id = "gpt2"
model = GPT2LMHeadModel.from_pretrained(model_id)
tokenizer = GPT2Tokenizer.from_pretrained(model_id)

text = "Hello"
encoded_text = tokenizer(text, return_tensors="pt") 

outputs = model(**encoded_text)