app.py

import gradio as gr

#def update( text, choice):
#    if (choice==“gpt2large“):
#        return f1(text)
       # return f"Welcome to Gradio, {name}!"
    
generator1 = gr.Interface.load("huggingface/gpt2-large")
generator2 = gr.Interface.load("huggingface/EleutherAI/gpt-neo-2.7B")
generator3 = gr.Interface.load("huggingface/EleutherAI/gpt-j-6B")


demo = gr.Blocks()

def f1(x):
    return generator1(x)
def f2(x):
    return generator2(x)
def f3(x):
    return generator3(x)

with demo:
    gr.Markdown(
    """
    # Hello World!
    Start typing below to see the output.
    """)
    inp = gr.Textbox(placeholder="Enter a statement to complete")
    radio = gr.Radio(
        ["gpt2large", "gptNeo", "gpt6b"], label="What transformer model?"
    )
    out1 = gr.Textbox()
    out2 = gr.Textbox()
    out3 = gr.Textbox()

    inp.change(fn=f1, 
               inputs=inp, radio,
               outputs=out1)
    out1.change(fn=f2, 
               inputs=out1, 
               outputs=out2)
    out2.change(fn=f3, 
               inputs=out2, 
               outputs=out3)
demo.launch()