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Comments:
<0> Alpha: I don't know about that -- a hardware buffer could only be addressed on the link layer, which is below TCP, and below IP. Perhaps, e.g., on the Ethernet layer.
<1> CardinalFang: actually, it doesn't always append space
<0> Teach me.
<2> I see, well i'll cross that bridge when I come to it as it were
<1> CardinalFang: when you use a comma at the end, no space is output until something else is printed
<1> and not at all if the value ends in a newline
<3> select.select can take files or file descriptors as parameters, right?
<1> yes
<1> and anything with a fileno method
<3> I must be doing something else wrong
<1> cout: getting an error message?
<0> Alpha: Ha ha.
<3> no
<3> I call select and it returns, so I call read to read data, but read blocks, so I never go back into select
<0> What does select say is ready to read?
<3> a pipe that was opened with fdopen by the popen2 module
<3> I thought I had this problem licked yesterday, but I was just imagining that I did
<4> (I am not a Python programmer, please excuse my ignorance for sometime) I have a zope product script which: from Products.BTreeFolder2 import CMFBTreeFolder - but i get: ImportError: cannot import name CMFBTreeFolder
<4> the CMFBTreeFolder.py script is in Products/BTreeFolder2
<4> and yet this error comes
<5> cout: don't mix select with stdio
<5> cout: if you use select, use os.read
<3> erwin: is it safe to use os.read with a file object?
<4> can someone just guide me to correct doc or any other help - thank-you
<5> cout: you p*** the obj.fileno() to os.read().
<3> erwin: I know that, but is that a good thing to do?
<5> cout: Is there an __init__.py file in the BTreeFolder2 directory?
<4> yes
<3> czaveri, I think you mean
<4> :-)
<5> cout: That's the only right thing to do. If you want to use select, you must not use buffered IO
<4> yes, it is there
<5> czaveri: Did you ask google for you error? It's like some isntallation/Zope issue.
<3> erwin: does python provide access to the buffer?
<4> i looked at Google for a lot of times - but no solution - so i came here
<4> it is not installation issue because all else is working fine
<4> many other files importing modules but no problems with any
<5> cout: Yes, that's what the file object method's use
<4> isn't there anything that exports module name?
<4> or may be the namespace changed? (pls excuse ignorance)
<6> anyone willing to help a noob with the while command?
<3> erwin: I meant direct access, e.g. can I check if there's anything in the buffer before p***ing the file object to select (or does select already do that?)
<6> it's stuck in a loop and i dont know why?
<5> czaveri: Zope does its own thing. If you can run the script from the command line, use python -v or -vv to trace how it imports things
<5> cout: You cannot. And select doesn't use the file object, it only uses the file descriptor.
<4> ok, i will try that, thank-you Erwin
<3> that's different than I'm used to, but I guess I can work with it
<5> cout: Hmm? It works exactly like that in any language
<3> ruby's standard lib does check the buffer first
<3> you still have to use sysread instead of read, though
<5> Ruby has a select system call wrapper that takes file descriptors or file objects and returns true for the file objects that have pending data in a buffer by direclty peeking into FILE* internals?
<3> yes
<5> Wow, that's ****ed up.
<5> I don't see anything about that behaviour in http://www.rubycentral.com/book/ref_m_kernel.html#Kernel.select
<3> that's a really old version of the book
<7> I am looking to run a linux command from within my python script what is the best way to do that?
<8> os.system
<8> also look at the subprocess module.
<7> Do you know if os.system waits for the process to complete before running the rest of the scripts?
<3> I should submit a documentation bug for that. the documentation for Kernel#select refers me to Kernel#select. :)
<9> JeSuisMor: i think so
<9> os.system returns the exit code from the command
<10> re
<7> Ok cool thanks
<9> re re
<10> I'm really lost with my imports
<3> how do I capture an exception if I don't know what it inherits from?
<9> JeSuisMor: test it
<10> I made sure that there's no circular imports
<9> maybe do os.system("sleep 5 && echo 'os.system completed'"); print "python script after os.system"
<8> try: ....; except ExcptionName: ....
<10> and still, I can't import another module which from current module's parent module
<8> cout: why would you need to know where the exception is inherited from to catch it in a try: except?
<8> eleusis: import time; help(time.sleep)
<9> er
<9> sysfault: i suggested that code to test the execution of os.system
<10> if in foo.module2.modb, I have import foo.module1.moda, and I do import foo.module2.modb from interpreter it won't find moda though if I do import foo.module1.moda from interpreter it works, and I'm clueless
<10> I tried tickering sys.path, unsuccessfully
<8> eleusis: looks like you suggested it in accordance to his question on how to delay execution of a process while another one is being executed.
<11> any pygame users here? having a problem and #pygame channel hasn't helped me yet :/
<3> sysfault: I mean I can write 'except Exception, exc' to capture the exception into exc, but that only catches exceptions that inherit from Exception; I want to know if there's an equivalent syntax for any kind of exception, even those that don't inherit from Exception
<9> sysfault: is that the question JeSuisMor asked?
<8> cout: hmm, except: with no arguments catches all exceptions afaik.
<9> aanyway
<9> goodnight ;)
<12> what's a descriptor in pythonesque?
<9> a descriptor?
<3> sysfault: but then I have to use sys.exc_info() to get the object; is there a syntactic shortcut?
<12> yes, a descriptor
<9> what kind of descriptor?
<12> descriptor 'date' requires a 'datetime.datetime' object but received a 'int'
<8> cout: don't think so.
<9> hm
<3> that's what I thought. I think I need the traceback anyway, so I'll just use exc_info().
<12> cout: except: is a DON'T DO THAT issue I'm starting to learn its value :)
<9> not sure
<3> yango: eh?
<9> i'm guessing you p***ed a value of the wrong type to a method somewhere
<13> Does "print "*%s%s" % (spacer, "*")" suppress all automatically inserted spaces?
<8> why would the particular string produce spaces?
<12> cout: that using only 'except:' is awful pythonic practice, according to experts
<13> well, every time you do "print spacer, "*"" it adds a space
<13> between spacer and the string
<8> you may want sys.stdout.write()
<14> is there a nice python reference other than the official, I find it hard to find what I need on the official one
<14> ?
<8> using a trailing comma appends spaces by default before the training text.
<8> trailing*
<14> I mean, the info it provides is nice, but it takes tons of time to find the functions I need
<3> yango: depends on what your goal is
<13> sysfault: exactly, so if I wanted to print a string, a variable, and then a string, it adds spaces, but pritning with formatting suppresses spaces, right?
<12> cout: sure
<14> oh, found something
<8> yes, shouldn't produce a space. Try it in the interpreter.
<3> yango: in my case the except: is at the outer edge of a thread, and if there's an uncaught exception it goes to the terminal, where the user might not see the message
<12> cout: I'm just pointing that out because I tended to think my goal justified the use of except: alone, but in the end didn't
<14> http://rgruet.free.fr/PQR24/PQR2.4.html <---not bad
<13> sysfault: the sys.stdout.write(), what do I need to include to use that? I am new to Python
<12> parker` import sys
<13> thanks
<14> which function can I use to run an external program and learn about it's return value?
<15> genia4, if you're on 2.4, I recommend the subprocess module
<13> newbie question: if I want to print an integer as a string with write, how do I do so? i.e. sys.stdout.write("size: " + size) doesn't work, neither does sys.stdout.write("size: ", size)
<14> benji: nothing simpler?
<14> I don't need any input/output redirections
<16> genia4: os.system()
<12> "size: " % (size,)
<14> just run a process, block, and get success/failure :)
<12> sorry, i mean
<12> "size: %s" % (size,)
<14> thanks luc***
<12> or "size: " + str(size)
<13> ahh
<15> genia4, see subprocess.call
<14> aha
<11> any pygame users here? having a problem and #pygame channel hasn't helped me yet :/
<14> benji: wow, subprocess is nice
<14> thanks
<15> np :)
<6> i need some help with the while command creating a loop
<14> python's docs need to learn from php :(
<6> anyone feeling kind?
<15> GMullen, just ask your question, then you'll know how kind we're feeling :)
<6> ok well first
<6> i'm trying to add the problem code it pastebin
<6> but only the first line it comming up
<6> nm
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