[Tutor] masking library files

[Danny Yoo]

Apologies for the multiple emails.  I'm still paging in from memory
how Python imports are working these days.  :P

If you have the freedom to do so, you may also turn on the absolute
import system:

    https://docs.python.org/2/whatsnew/2.5.html#pep-328-absolute-and-relative-imports

so that you can avoid the issue altogether, at least within your own code.


This is not the default behavior in Python 2, so you've got to
opt-into it.  I believe it is the default in Python 3, so it should
not be an issue in Python 3 code.