widgets.FileUpload() not working

Part 1 (2020)
29

Hey everyone, new student here.

The PILImage.create() function requires the image we’re trying to upload. From the docs I read

    >>> import ipywidgets as widgets
    >>> uploader = widgets.FileUpload()

    # After displaying `uploader` and uploading a file:

    >>> uploader.value
    [
      {
        'name': 'example.txt',
        'type': 'text/plain',
        'size': 36,
        'last_modified': datetime.datetime(2020, 1, 9, 15, 58, 43, 321000, tzinfo=datetime.timezone.utc),
        'content': <memory at 0x10c1b37c8>
      }
    ]
    >>> uploader.value[0].content.tobytes()

That’s what we need to pass to PILImage.create(). Here’s the final code

def on_click_classify(change):
    img = fastbook.PILImage.create(btn_upload.value[0].content.tobytes())
    out_pl.clear_output()
    with out_pl: display(img.to_thumb(128,128))
    pred,pred_idx,probs = learn.predict(img)
    lbl_pred.value = f"Prediction: {pred}; Probability: {probs[pred_idx]:.04f}"
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