So given

  /home/a
  /home/a/k.py
  /home/a/c/j.py
  /home/b/z.py
  /home/b/c/f.py

and a current directory of /home/a, we'd have:

   pattern   matches
   -------   -------
   *.py      k.py, c/j.py
   c/*.py    c/j.py
   c*        c               [?]
   ../*.py   ?
   ../c/*.py ?

Thinking about those .. cases makes my brain hurt :)  What does it mean to match '../*.py' when I'm recursing into the c subdirectory?  What does it mean in the current directory, for that matter?

As you can see, your short explanation has left me with one case where I have a question, and one set of cases where my intuition completely fails.

--David