any macro-like construct/technique/trick?
idontneednostinkinid at yahoo.com
Thu Jun 2 04:49:37 CEST 2005
After I wrote my post I realized I didn't provide enough context of
what I'm doing, hence it is not quite clear to any readers why the heck
I would want this. The gist is this. I have a number of algorithms
that perform the same task. I'm trying to assess which ones work better
under which circumstances, which means I'm timing them (interested in
*relative* speed, so Python is acceptable). I also have a second app
which allows me to "observe" the operation of said algorithms by
consuming such emitted debug objects and graphically displaying the
information therein. I'm "observing" with a very fine granularity,
which means a debug object is emitted between almost every single line.
Naturally, if every second line is debug code (or worse, as above, 1
line of real code, 2 lines of debug code), the readability of the
algorithm is horrendous, making further development a pain. Since,
when I'm NOT observing the algorithms then I'm timing them, I want the
debug/observe code to have minimal impact on the runtimes;
instantiating some of these debug objects is rather costly.
There, hopefully this gives a better picture of my motivation. If
anyone can suggest alternate way to structure such code, I'm all ears
(... well, eyes, really... :)
Your proposal for one-lining the code as "if debug: emit_....."
occurred to me, but for readability reasons I want as visually *short*
a line as possible, so it doesn't detract from the other code. The C
preprocessor was particularly helpful in such "shortening". (e.g.,
print "foo"; DBG(DbgObj(..)); print "bar";)
Hmm, with this setup you can't get any shorter than the instantiation
of the DebugObject... which gives me an idea... the "if debug:" could
be placed within DebugObjectBase, and all the DebugObjects inherit from
it... no... wait... no good, the problem is the following case:
# real line of code
# real line of code
On a debugging/observing run, the debugging objects occasionally have
their constructor values computed externally, as above, and the
proposed solution would not save us from that costly computation.
More information about the Python-list