title: How to fix TypeError: Expected unicode, got pandas._libs.properties.CachedProperty
body: <p>I'm trying to add an empty column in my dataset on colab but it gives me this error. When I'm trying to run it on my local machine it works perfectly fine.</p>
  <p>Does anybody have a possible solution for this?</p>
  <p>My code:</p>
  <pre><code>dataframe[&quot;Comp&quot;] = ''
  dataframe[&quot;Negative&quot;] = ''
  dataframe[&quot;Neutral&quot;] = ''
  dataframe[&quot;Positive&quot;] = ''
  dataframe
  </code></pre>
  <p>Error message:</p>
  <pre><code>TypeError: Expected unicode, got pandas._libs.properties.CachedProperty```
  </code></pre>