Which one is better python 2 or python 3? And why there is no python 2 courses in sololearn? Thanks

Answer 1

Both are supported and used. Last one, python 3, is the platform to be used if you are starting now from scratch. Most of the python users are gently moving to 3, that's why you have just the course for python 3. BTW differences between 2 and 3 are only minor

Answer 2

Python 2 will be reaching end of life soon. Python 3 offers some speed up and conveniences like type hinting, going by the blog post describing the experiences of Instagram migrating from Python 2 to Python 3.

So if you are starting out, it is best you invest your learning in Python 3. Sololearn caters to beginners and might be encouraging Python 3 over Python 2 through actions instead of words.