I cant really pin it down, but when I am programming in Python, the language flows along with my thoughts.
During intensive programming sessions, I never really feel the difference between my thoughts and the language flow.
I hope I make sense.
Often, I start solving a problem, solve a core part, then have to tack on additional conditions or workflows and I can just think about them and build them in python.
I have never had that happen in other languages and I have used C#, JS, C, C++, Java, Scala & VB.