Here in this, expert expresses his views about Python vs. R., whereas he says both the languages have their own use and value. However, both are into the Data Science languages. It completely depends on an individual what they prefer.
The expert expresses himself about data science languages. He says that he never tried picking one and it completely depends upon an individual that which language does he/she prefers. Both the languages are meant for data science, so Python vs. R is dependent on one's choice.
If you're trying to operationalize code and put it into a system and you know Python then definitely it is the one that you should go for and helps you throughout your work.