Which is better:- (1) c++ (2) python

Answer 1

Both.

How do you define "better"? What are the criteria and how do you evaluate them?

Programming languages are only tools. It depends on the context, your experience and your preferences.

Answer 2

Depends on what you want to create and the ease of doing so. Python is becoming very popular and it easier to learn. So that could be a better choice.