How we have to save python file?

Answer 1

In Sololearn?
- go to Code Playground
- code in Python
- save

Answer 2

.py

Or do you mean something else?

Answer 3

Assuming you are on windows OS

Open notepad and write this line
print("hello world")
Go to file > save as > example.py

Is not it simple enough

Answer 4

Muhd Khairul Amirin Bin Yaacob perfect