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Comments:
<0> if var:
<0> print 'i exist'
<1> tom_elam: you could, but not with a stdlib module. there's a third-party module for it, though.
<0> armenb: you can wrap the variable name in a bool()
<1> armenb: why don't you already know? Just ***ign a special variable to the variable to start with
<1> sysfault: heh, not really.
<1> armenb: the usual Python idiom is 'var = None', then later test with 'if var is None:'
<1> sysfault: 'if var' throws an exception when var isn't defined yet because var isn't defined yet, not because it's syntactically incorrect.
<2> Yhg1s, "if var" is incorrect syntax
<2> Yhg1s, he added in :
<3> Yhgls: i'm kinda new to python, but i'm surprised there isn't some standard module for this. what about sysv semaphores?
<1> kbrooks: oh please.
<1> tom_elam: same story.
<2> Yhg1s, OK.
<0> Yhg1s: what? if var: throws an exception only if var does not exist.
<0> i may have misunderstood your above statement.
<1> sysfault: ... yes. which was armenb's point.
<1> sysfault: he was looking for a way that didn't throw an exception.
<2>
<1> sysfault: 'bool(var)' also doesn't work, for the record.
<0> yea it raises an exception for undefined variables.
<0> just like the if.
<1> exactly.
<4> np: ITC.SDF-GuidoVanRossum.1-2005.02.17.mp3
<0> now i know why it should be set to None first.
<3> Yhgls: where's a good place to read about `a stdlib module'?
<1> tom_elam: docs.python.org/lib
<3> Yhgls: thanks! I think I can take it from here...
<4> sick
<4> guido works for google now
<4> :O
<5> hi. I'm new to Python. I'm reading the tutorial about modules. Is there a quick way to load all the *.py files in a subdirectory specified by a path supplied to the argv?
<1> tom_elam: btw, there is no 'l' in my nick, just a '1'.
<3> Yhg1s: oops! Sorry!
<5> I'm thinking about using straight Python as configuration files for a script I'm writing.
<6> tnks: see ConfigParser for configuration files, it's pretty neat
<7> warning: ConfigParser does funny things to your files
<7> lowercases the keys and adds spaces around the =s
<5> sTeVuu: interesting, but my input involves a lot of long strings that might have miscreant characters that would need delimiting otherwise. I was hoping to just use """ to manage it.
<7> somewhat easy to fix though, http://rafb.net/paste/results/653W6U55.html is what i did to make it usable for freedesktop.org .desktop file
<1> tnks: so what's stopping you? you may be interested to read about packages (directories with __init__.py's in them), __import__, os.listdir, maybe execfile.
<3> Yhg1s: Is this what you were referring to when you mentioned stdlib modules: http://www.python.org/doc/api/includes.html
<5> Yhg1s: I'll see if I can find it. If you have a quick link, though, I'll take it.
<1> tnks: to all of those? docs.python.org/lib.
<1> __import__ and execfile are in the builtin functions section. os.listdir is in the 'os' section.
<1> packages are explained in section 6.4 of the tutorial: http://docs.python.org/tut/node8.html#SECTION008400000000000000000
<1> tom_elam: no, I was referring to docs.python.org/lib
<1> tom_elam: that's the library reference. it documents the standard library ('stdlib')
<8> how do i kill a thread in python from within the thread i want to kill? sys.exit() ?
<1> tom_elam: docs.python.org/api (which is the same thing as www.python.org/doc/api) documents the C API to Python, for extending and embedding Python.
<3> Yhg1s: I hadn't heard it called `stdlib' before.
<1> endeavormac: sure, or any exception will do. or you can just make it end the original function.
<8> ok, thanks
<1> tom_elam: sorry, that's standard terminology in the python community.
<3> Yhg1s: sorry, I looked all through the index & module list in docs.python.org/lib and couldn't find the kind of semaphores that can be shared by different processes. I need a key or name to access them in different processes.
<9> hi there
<1> tom_elam: eh? I told you there wasn't a way in the stdlib :)
<9> newbie here. i got some problems with Gtk TreeStore sorting
<9> is there any simple example of how to sort a floating column?
<9> s/floating/float
<4> hey
<4> guido is a likeable guy
<3> Yhg1s: yes, sorry, I am grossly sleep deprived. ;-)
<4> i'm listening to his presentation.
<3> Yhg1s: can you refer me to the 3rd party implementation, please?
<1> tom_elam: Google tells me http://www.ka.sara.nl/home/walter/python-ipc/
<3> Yhg1s: otherwise, I guess I'll have to figure out that old 2-phase commit stuff I heard about an eon ago.
<9> anyone any idea?
<1> tom_elam: well, there are more ways to communicate between processes. mmap, for instance (the mmap module exposes it.) Pipes, sockets, fifos, files.
<3> Yhg1s: okay, thanks! I'll take it from here now... Thanks a lot, really!
<1> paniq: yes, he really is.
<10> paniq: what's his presentation on?
<4> building of an open source group
<4> http://www.itconversations.com/shows/detail545.html
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