# Dynamical/Flexible output
**URL:**
**Author:**  [@Herdre](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FHerdre)%5C
**Post date:** [May 19, 2022, 11:38am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdynamical-flexible-output%2F18146%2F1 "2022-05-19T11:38:16Z")
Hey đź‘‹
I wonder if there any way to make dynamical output.
For example if my model found 3 audio then show 3 gr.outputs.Audio()
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**Author:**  [@abidlabs](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fabidlabs)%5C
**Post date:** [May 20, 2022, 2:15am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdynamical-flexible-output%2F18146%2F2 "2022-05-20T02:15:37Z")
Hi @Herde, yes this is possible using the new [Blocks API](https://www.gradio.app/docs/#blocks):
Basically the idea would be that you can have multiple `gr.Audio()` outputs, and for each output, you can either use it to play audio or update its `visible` property to `False` if you would like to hide it.
Let me know if you have follow up questions!
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**Author:**  [@noe-mi](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fnoe-mi)%5C
**Post date:** [November 17, 2023, 9:39am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fdynamical-flexible-output%2F18146%2F6 "2023-11-17T09:39:12Z")
Hi @abidlabs, I have the same question, but with the documentation I am unable to implement it. Let’s say my model returns a variable number of images (as a list or a tuple of np.arrays) and I want the app to dynamically set the number of output blocks based on the model output’s length. I found on the website an example with a Slider:
> **[Controlling Layout](https://www.gradio.app/guides/controlling-layout)**
>
> A Step-by-Step Gradio Tutorial
but I am stuck if I want to implement something similar with a button, because I have no access to the length of my output within the interface.
Here is my (dummy) code, based on that example:
```auto
max_outputs = 11
def variable_outputs(k):
k = int(k)
return[gr.Image(visible=True)]*k + [gr.Image(visible=False)] * (max_outputs - k)
def predict(img):
return [img, ~img, img]
with gr.Blocks() as demo:
with gr.Row():
img_input = gr.Image()
out_boxes = []
for i in range(max_outputs):
out_box = gr.Image()
out_boxes.append(out_box)
gr.Button("Predict").click(predict, inputs=img_input, outputs=variable_outputs(len(out_func)))
```
Not surprisingly, this code raises the error
```auto
TypeError: object of type 'function' has no len()
```
How can I have access to the output’s length during or after the click on the button?