Yun Mao wrote:
Can someone give me some pointers to the related docs? Thanks.
It's a variable name. See
http://docs.python.org/ref/identifiers.html
If you were hoping of a more elaborate answer, please refer to
http://groups.google.ca/groups?threa...0uni-berlin.de
and also give just a *little* more detail in your next question,
so we don't have to mindread about which use of "_" you are
talking about. It's used as a standalone variable name, as a
prefix in several different ways, sometimes as a substitute for
self, and so on. Which do you mean?
-Peter