app.py

import gradio as gr

def bmi_calculator(weight, height):
    try:
        height_m = height / 100  # 公分轉換成公尺
        bmi = weight / (height_m ** 2)
        if bmi < 18.5:
            category = "體重過輕"
        elif 18.5 <= bmi < 24:
            category = "正常範圍"
        elif 24 <= bmi < 27:
            category = "過重"
        elif 27 <= bmi < 30:
            category = "輕度肥胖"
        elif 30 <= bmi < 35:
            category = "中度肥胖"
        else:
            category = "重度肥胖"
        return round(bmi, 2), category
    except Exception as e:
        return None, f"錯誤: {e}"

with gr.Blocks() as demo:
    gr.Markdown("# 🧮 BMI 計算器")
    with gr.Row():
        weight = gr.Number(label="體重 (kg)")
        height = gr.Number(label="身高 (cm)")
    calc_btn = gr.Button("計算 BMI")
    output_bmi = gr.Number(label="BMI 值", interactive=False)
    output_cat = gr.Textbox(label="結果說明", interactive=False)

    calc_btn.click(fn=bmi_calculator, inputs=[weight, height], outputs=[output_bmi, output_cat])

demo.launch()