app.py

import gradio as gr
import joblib as jb

def predict(sex, age, pclass):
    model = jb.load('model.pkl')
    pclass = int(pclass)
    p = model.predict_proba([[sex, age, pclass]])[0]

    return {"Did not survive": p[0], "Survived": p[1]}

demo = gr.Interface(fn=predict,
                    inputs=[gr.Dropdown(choices=["male", "female"], type="index"), 
                            "number", 
                            gr.Dropdown(choices=["1", "2", "3"], type="value")
                            ],
                    outputs="label")
demo.launch()