title: widgets.FileUpload - Read the uploaded CSV
body: <p>I am using <code>widgets.FileUpload</code> to upload a CSV to jupyter and read it. I am using below yo upload.</p>
  <pre><code>input_file = widgets.FileUpload(
      accept='.csv',  # Accepted file extension e.g. '.txt', '.pdf', 'image/*', 'image/*,.pdf'
      multiple=False  # True to accept multiple files upload else False
  )
  
  input_file
  </code></pre>
  <p>I have uplaoded the file and when i print <code>print(input_file.value)</code> I can see the data.</p>
  <p>But when i read through <code>data = pd.read_csv(input_file.value, encoding = &quot;ISO-8859-1&quot;)</code> I see below error</p>
  <p><code>ValueError: Invalid file path or buffer object type: &lt;class 'dict'&gt;</code></p>
  <p>Any pointers please.</p>