Can i do these two things:

Is there any library in dart for Sentiment Analysis? 
Can I use Python (for Sentiment Analysis) in dart? 

My main motive for these questions is that I'm working on an application in a flutter and I use sentiment analysis and I have no idea that how I do that. 
Can anyone please help me to solve this Problem.?
Or is there any way that I can do text sentiment analysis in the flutter app?
You can create an api using Python then serve it your mobile app (FLUTTER) using http requests.
I
Python and Dart Integration in Flutter Mobile Application