app.py

import gradio as gr
from gradio_client import Client
import numpy as np

MAX_SEED = np.iinfo(np.int32).max
MAX_IMAGE_SIZE = 2048

flux_1_schell_spaces = [
    "https://black-forest-labs-flux-1-schnell.hf.space",
    "ChristianHappy/FLUX.1-schnell",
    "innoai/FLUX.1-schnell",
    "tuan2308/FLUX.1-schnell",
    "FiditeNemini/FLUX.1-schnell"
]

client = None
job = None

def infer(selected_space, prompt, seed=42, randomize_seed=False, width=1024, height=1024, 
          num_inference_steps=4, progress=gr.Progress(track_tqdm=True)):
    global job
    global client
    
    if client is None:
        try:
            client = Client(selected_space)
            print(f"Loaded custom model from {selected_space}")
        except ValueError as e:
            client = None
            print(f"Failed to load custom model from {selected_space}: {e}")
            raise gr.Error("Failed to load client after trying all spaces.")
            
    try:
        job = client.submit(
            prompt=prompt,
            seed=seed,
            randomize_seed=randomize_seed,
            width=width,
            height=height,
            num_inference_steps=num_inference_steps,
            api_name="/infer"
        )
        result = job.result()
    except ValueError as e:
        client = None
        raise gr.Error(e)
    return result

# 将示例格式化为正确的嵌套列表格式
examples = [
    ["a tiny astronaut hatching from an egg on the moon"],
    ["a cat holding a sign that says hello world"],
    ["an anime illustration of a wiener schnitzel"],
]

css = """
#col-container {
    margin: 0 auto;
    max-width: 520px;
}
"""

with gr.Blocks(css=css) as demo:
    selected_space_index = gr.State(0)
    
    with gr.Column(elem_id="col-container"):
        space = gr.Radio(
            flux_1_schell_spaces,
            label="Choose Your Flux Model",
            value=flux_1_schell_spaces[0]
        )
        
        with gr.Row():
            prompt = gr.Text(
                label="Prompt",
                show_label=False,
                max_lines=1,
                placeholder="Enter your prompt",
                container=False,
            )
            run_button = gr.Button("Run", scale=0)
            
        result = gr.Image(label="Result", show_label=False)
        
        with gr.Accordion("Advanced Settings", open=False):
            seed = gr.Slider(
                label="Seed",
                minimum=0,
                maximum=MAX_SEED,
                step=1,
                value=0,
            )
            randomize_seed = gr.Checkbox(label="Randomize seed", value=True)
            
            with gr.Row():
                width = gr.Slider(
                    label="Width",
                    minimum=256,
                    maximum=MAX_IMAGE_SIZE,
                    step=32,
                    value=1024,
                )
                height = gr.Slider(
                    label="Height",
                    minimum=256,
                    maximum=MAX_IMAGE_SIZE,
                    step=32,
                    value=1024,
                )
                
            with gr.Row():
                num_inference_steps = gr.Slider(
                    label="Number of inference steps",
                    minimum=1,
                    maximum=50,
                    step=1,
                    value=4,
                )
                
        gr.Examples(
            examples=examples,
            inputs=prompt,  # 只使用 prompt 作为输入
            outputs=result, # 只使用 result 作为输出
            fn=infer,      # 使用 infer 函数
            cache_examples="lazy"
        )
        
        gr.on(
            triggers=[run_button.click, prompt.submit],
            fn=infer,
            inputs=[
                space,
                prompt,
                seed,
                randomize_seed,
                width,
                height,
                num_inference_steps
            ],
            outputs=[result, seed]
        )

        """
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                """

demo.launch()