In Python, can I specify a function argument's default in terms of other arguments?

Question

Suppose I have a python function that takes two arguments, but I want the second arg to be optional, with the default being whatever was passed as the first argument. So, I

Answer 1

The second way is fine in my opinion: it is exactly clear what you do, and for all those who will come after you and read the code. While there is a slight overhead in documenting the default behavior, the use of 'None' or any other to make your function generate a default value is very common. Putting logic inside the function calls would certainly not be commendable in my opinion, it could become very complex very soon. So just leave it in the function body, where all the code is.