AttributeError: module 'pandas.io.formats' has no attribute 'style'
https://github.com/pandas-dev/pandas/blob/0409521665bd436a10aea7e06336066bf07ff057/pandas/io/formats/style.py#L496-L501

I am using the Pandas version 0.23.4.
When I call pandas.io.formats.style.Styler.clear(), it gives the error:  "AttributeError: module 'pandas.io.formats' has no attribute 'style'".
However, I could find the 'style.py' under the Pandas installation folder. 
