I,m trying to add empty column in my dataset on colab but it give me this error. and when I,m trying to run it on my local machine it works perfectly fine. does anybody know possible solution for this?

My code.

```
dataframe["Comp"] = ''
dataframe["Negative"] = ''
dataframe["Neutral"] = ''
dataframe["Positive"] = ''
dataframe

```

> 
> Error message
> 
> 
> 

TypeError: Expected unicode, got pandas.\_libs.properties.CachedProperty