Gradio自动刷新演示。
实时界面
你可以在界面中设置live=True让界面自动刷新，这样只要用户输入发生变化，界面就会重新计算。
import gradio as grdef calculator(num1, operation, num2):if operation == "add":return num1 + num2elif operation == "subtract":return num1 - num2elif operation == "multiply":return num1 * num2elif operation == "divide":return num1 / num2demo = gr.Interface(calculator,["number",gr.Radio(["add", "subtract", "multiply", "divide"]),"number"],"number",live=True,
)
demo.launch()
请注意，没有提交按钮，因为界面会在更改时自动重新提交。
流媒体组件
有些组件有“流式”模式，比如Audio麦克风模式的组件，或者Image摄像头模式的组件。流式意味着数据被连续发送到后端，Interface函数被连续重新运行。
gr.Audio(source='microphone')和gr.Audio(source='microphone', streaming=True)的区别在于当同时使用gr.Interface(live=True)时，前者Component会在用户停止录制时自动提交数据并运行该Interface函数，而后者会在录制过程中Component持续发送数据并运行该Interface函数。
这是从网络摄像头流式传输图像的示例代码。
import gradio as gr
import numpy as npdef flip(im):return np.flipud(im)demo = gr.Interface(flip, gr.Image(sources=["webcam"], streaming=True), "image",live=True
)
demo.launch()流式传输也可以在输出组件中完成。gr.Audio(streaming=True)输出组件可以接收由生成器函数分段生成的音频数据流，并将它们组合成单个音频文件。
import gradio as gr
from pydub import AudioSegment
from time import sleepwith gr.Blocks() as demo:input_audio = gr.Audio(label="Input Audio", type="filepath", format="mp3")with gr.Row():with gr.Column():stream_as_file_btn = gr.Button("Stream as File")format = gr.Radio(["wav", "mp3"], value="wav", label="Format")stream_as_file_output = gr.Audio(streaming=True)def stream_file(audio_file, format):audio = AudioSegment.from_file(audio_file)i = 0chunk_size = 1000while chunk_size * i < len(audio):chunk = audio[chunk_size * i : chunk_size * (i + 1)]i += 1if chunk:file = f"/tmp/{i}.{format}"chunk.export(file, format=format)yield filesleep(0.5)stream_as_file_btn.click(stream_file, [input_audio, format], stream_as_file_output)gr.Examples([["audio/cantina.wav", "wav"], ["audio/cantina.wav", "mp3"]],[input_audio, format],fn=stream_file,outputs=stream_as_file_output,)with gr.Column():stream_as_bytes_btn = gr.Button("Stream as Bytes")stream_as_bytes_output = gr.Audio(format="bytes", streaming=True)def stream_bytes(audio_file):chunk_size = 20_000with open(audio_file, "rb") as f:while True:chunk = f.read(chunk_size)if chunk:yield chunksleep(1)else:breakstream_as_bytes_btn.click(stream_bytes, input_audio, stream_as_bytes_output)if __name__ == "__main__":demo.queue().launch()
