Python’s development team chose defaults that reflect the most common real-world scenarios. But if you do need to tweak the way garbage collection works, you can use Python’s gc module.

in current folder in folder specified in the system variable PYTHONPATH in folders given during Python installation in folders secified in variable sys.path, which is oridinaly list. This path can be ...

In Python, sys.stdin is a read-only file object from which you can grab the user's input. So, if you want to test the "double" function from above, you can (should) replace sys.stdin with another file ...