Please translate this easy snip of C++ to Python
phlip_cpp at my-deja.com
Mon Feb 5 06:59:47 CET 2001
Fredrik Lundh wrote:
> That's a preprocessor trick, not a C++ trick. Replace <<
> with printf, and it works just as fine under C.
Could'a mentioned that's where the trick started with me. Before the #
stringerizer operator got invented, too...
> (iirc, bjarne thinks that real C++ programmers shouldn't
> use the preprocessor at all, but what does he know...)
The exact rule is "Don't use a low-tech feature when a high-tech one will
do". You'l notice this rule explains why I'm deep in the coils of Python
One should not use the C preprocessor to perform simple administration,
such as declaring a constant. But only the preprocessor has the
stringerizer operator #; and it's a quite recent addition, based on bugs
exploited in earlier preprocessors to stringerize without it, so it
qualifies as high-tech.
> Run your Python code through C's preprocessor?
We are already deep in a stack of script, Perforce Jam, Python, SWIG and
C++ code; we don't need another operation on our source!
Thomas Wouters wrote:
> Note how Python lacks a preprocessor and macros :)
No, reaching down into the interpret's own pants and grabbing its nads with
lines like these will do nicely:
frame = sys.exc_info().tb_frame.f_back
chris at onca.catsden.net wrote:
> And... not sure if there's a equivalent of __line__
I just threw that one in worrying the first question might turn out too
Thanks to all the replies; I'l try the suggestions (and learn what
"trace()" does) as soon as I'm on the clock ;-)
Phlip phlip_cpp at my-deja.com
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