Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in a list, using a list comp)
Chris Hengge wrote: > I hope this is related enough for this thread, but I'm curious why > people didn't seem to unanimously jump into 2.5 upon release. Python > seems very good about holding its backward compatibility vs some other > languages I've dealt with like C# that seems to require applications > rewritten with every patch. Was there just nothing that "grand" about > the new version? I've personally held back just because most of the > documentation I've come across is for 2.4, and until I get a firmer feel > for the language I'm trying to not mix things up. Speaking for myself as a Win32 user, you generally have to recompile / download compiled binaries for any new release of Python. I have downloaded 2.5 and there certainly are things which interest me, but I won't shift to using it for mainstream work until all the modules I need are available at 2.5. (For the most part I could compile them myself with mingw32, but you start to realise just how much work is involved when you need to download libs and headers for all the externals. So I'm lazy and wait for the project maintainer to supply...). Also I'm faintly chary of starting to use some whizz-bang new feature (like the with block) which is incompatible with 2.4 and then trying to run the code on my webserver where I've only got 2.4! TJG ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] subprocess.Popen.communicate()[]
"Isaac" <[EMAIL PROTECTED]> wrote > Without communicate()[0] the screen is blank and no prompt. Ah. I see. OK, Thanks for clarifying that. I should have tried both versions, I only checked that my version did, in fact, clear the screen, I didn't check how yours behaved - naughty! Alan G. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in alist, using a list comp)
"Chris Hengge" <[EMAIL PROTECTED]> wrote >...I'm curious why people didn't seem to unanimously jump > into 2.5 upon release. I can't speak for anyone else, but personally I never load the first version of any software. I only upgrade when I find a feature I actually know I need and after I'm confident that the bugs have been squashed. This applies to all software not just Python. I'm currently running FrameMaker 5.5 (latest vesion is 7!) and MS Word 97/2002(latest version???). Most of my Oracle databases are still at version 8. On my servers at work Python is still at v2.2. We only upgraded our Win2000 boxes to XP after SP2 came out (6 months after to be accurate!) Chasing the latest release is a time consuming sport that isn't worth doing unless it actually delivers some real benefit IMHO. Which is why I asked what the real benefits of 2.5 are? >From Wes' list I only see tertiary operators and try/except/finally as useful to me - and both are just minor style fixes. So I doubt if I'll move from 2.3(MacOS)/2.4(XP and Linux) for a while yet - at least not until the ActiveState version comes out for XP. One thing I will be investigating is the WSGI stuff, I've come across mentions of that several times now, and know nothing about it. Alan G. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in a list, using a list comp)
wesley chun wrote: > below is a quick summary of the 2.5 highlights. of these, i like/use > the following: > 1, 2, 4, 5, 6, 7, (8), 9a, 9b. > > 7) Enhanced Generator Features (PEP 342) -- now you can "talk-back" to > a generator, meaning you can send data into it as you resume it... > .next() sends None, .send(obj) sends obj, .throw(exc) throws exception > exc Are you using this? I would be interested in finding out how. This seems like a feature that allows Python to be used in a new way, but I have not yet seen any real applications of it. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] XML-RPC data transfers.
>http://www.velocityreviews.com/forums/t343990-xmlrpc-send-file.html
>
>Using this example I get error's about 'expected binary .read(), but got
>instance instead.
I assume you are using this ...
>d = xmlrpclib.Binary(open("C:\\somefile.exe").read())
Are you using windows?
I think you would need to pass the binary flag to open ...
imagedata = open(filename, 'rb').read()
It's probably a good idea to use the binary flag if you are expecting
binary data just in case it gets ported somewhere else later.
>I've just been using xmlrpclib and simplexmlrpcserver for this, but I'm
>wondering if I should perhaps use twisted instead.
I've used xml-rpc to send image data before. It worked.
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Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in a list, using a list comp)
* Chris Hengge <[EMAIL PROTECTED]> [061229 02:25]: >I hope this is related enough for this thread, but I'm curious why people >didn't seem to unanimously jump into 2.5 upon release. Python seems very >good about holding its backward compatibility vs some other languages I've >dealt with like C# that seems to require applications rewritten with every >patch. Was there just nothing that "grand" about the new version? I've >personally held back just because most of the documentation I've come >across is for 2.4, and until I get a firmer feel for the language I'm >trying to not mix things up. I'd say it's a deployment issue. So basically people with deployement issues keep back. People with small user populations are already upgrading to 2.5. Andreas ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in a list, using a list comp)
Chris Hengge wrote: > I hope this is related enough for this thread, but I'm curious why > people didn't seem to unanimously jump into 2.5 upon release. If I'm driving a 2006 model car, I don't rush right out and trade for a 2007 model just because they are available. There's cost and effort involved with changing versions. Not the least is having to retest all your existing applications. Generators now have a different syntax, so some applications would need some updating in order to take advantage of 2.5. The new "with" statement is very cool, though. > I've personally held back just because most of the > documentation I've come across is for 2.4, 100% of this is Python 2.5 documentation: http://docs.python.org/ Very little of it had to change from the last version. -- Sincerely, Chris Calloway http://www.seacoos.org office: 332 Chapman Hall phone: (919) 962-4323 mail: Campus Box #3300, UNC-CH, Chapel Hill, NC 27599 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in a list, using a list comp)
Chris Calloway wrote: > Generators now have a different syntax, so some applications would need > some updating in order to take advantage of 2.5. The old syntax still works. "yield x" is now an expression returning a value, rather than a statement, so it can be used in new ways, but a plain "yield x" is fine. > The new "with" statement is very cool, though. > >> I've personally held back just because most of the >> documentation I've come across is for 2.4, > > 100% of this is Python 2.5 documentation: > > http://docs.python.org/ > > Very little of it had to change from the last version. To amplify this a bit - backward compatibility between Python releases is generally excellent. It is rare for something that works in 2.x to fail in 2.x+1. There may be a better way to do something using a new feature but the old ways will usually work. So if you are learning Python from a book that covers 2.3 or 2.4, you should do fine with 2.5. When you want to know what has been added that is not in your book, check the excellent "What's New in Python 2.x" guides that are included with the docs for each version. These guides also include a "Porting to Python 2.x" section that lists the incompatible changes in the new version. For example, see http://docs.python.org/whatsnew/porting.html Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in a list, using a list comp)
Kent Johnson wrote: > wesley chun wrote: > >> below is a quick summary of the 2.5 highlights. of these, i like/use >> the following: >> 1, 2, 4, 5, 6, 7, (8), 9a, 9b. >> >> 7) Enhanced Generator Features (PEP 342) -- now you can "talk-back" to >> a generator, meaning you can send data into it as you resume it... >> .next() sends None, .send(obj) sends obj, .throw(exc) throws exception >> exc >> > > Are you using this? I would be interested in finding out how. \ In the past month I wrote a file parser that is sorta recursive descent. I wrote a generator that takes the first token of each file line and looks it up in the current keyword list. If not found it stops iteration, control returns to a higher level which has its own version of the generator instantiated with a different keyword list. With the ability to pass an object, I can simplify my code so there is one instance of the generator, and each level passes its own keyword list. > This seems > like a feature that allows Python to be used in a new way, but I have > not yet seen any real applications of it. > > Kent > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > -- Bob Gailer 510-978-4454 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tutor Digest, Vol 34, Issue 55
Message: 1 Date: Thu, 28 Dec 2006 17:24:41 -0800 From: "Chris Hengge" <[EMAIL PROTECTED]> Subject: Re: [Tutor] OT: Python 2.5 (Was Re: Length of longest item in I hope this is related enough for this thread, but I'm curious why people didn't seem to unanimously jump into 2.5 upon release. One reason- having to upgrade all the packages that you've installed is time consuming. Another- we have a very large tools framework where I work. Someone needs to make sure these tools will work with any new version of Python. We use 2.3at the moment, and there is no significant reason to upgrade to 2.4 or 2.5, to justify the time involved in testing all the tools to make sure every line of code is executed with the new version. As far as my home use, I'm still using 2.4, and will keep it that way until I need to install something that requires 2.5. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] about reload
I read something about reload of modules. #test.py from ABC import M # M is an attribute of Module ABC if I change module ABC, I need import ABC and reload ABC before "from ABC import M" work. in IDLE, I just click F5 and run the code, it works and does not need type anything like "Import ABC", "Reload(ABC)". Why the book say the two steps are needed? Thanks, Linda ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] about reload
On Fri, 29 Dec 2006, linda.s wrote: > I read something about reload of modules. > #test.py > from ABC import M # M is an attribute of Module ABC > > if I change module ABC, I need import ABC and reload ABC before "from > ABC import M" work. in IDLE, I just click F5 and run the code, it works > and does not need type anything like "Import ABC", "Reload(ABC)". Why > the book say the two steps are needed? reload() is necessary if we don't re-run everything from scratch. When you're pressing F5 in IDLE, IDLE restarts the whole program, so in that particular case, you don't need to worry about reload() at all. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] about reload
Danny Yoo wrote: > On Fri, 29 Dec 2006, linda.s wrote: > > >> I read something about reload of modules. >> #test.py >> from ABC import M # M is an attribute of Module ABC >> >> if I change module ABC, I need import ABC and reload ABC before "from >> ABC import M" work. in IDLE, I just click F5 and run the code, it works >> and does not need type anything like "Import ABC", "Reload(ABC)". Why >> the book say the two steps are needed? >> > > reload() is necessary if we don't re-run everything from scratch. > > When you're pressing F5 in IDLE, IDLE restarts the whole program, so in > that particular case, you don't need to worry about reload() at all. > Actually, if you have IDLE in the default setup on Windows and you right-click something to edit it, IDLE doesn't open a subprocess each time a script is executed, so it will keep the imports in between runs of the program. I.E. if I type "import math" into the IDLE interpreter, I can then make a file with the contents # start print math.pi #- end and it will work. just thought I'd mention that. > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Best way to learn python
What is the best way for someone who is not very efficient in mathematics to learn Python, I was turned away from C++ and others because of the math issue. Ruby has been recommended as well. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Best way to learn python
I'm not exactly a math guru, either, but know some algebra & geometry from school. When I first tried my hand at Python, I started with just the tutorial bundled with the Python download. I had been taken a semester in Pascal & tinkered with Perl & Java at that point, and found Python to be simpler & more obvious, so if you have a bit of programming at all your experience is likely as good as mine was at the time. What's your programming background? What sort of programming would you most immediately like to do? And Ruby's also a fine language. -Rob A. On 12/29/06, Daniel kavic <[EMAIL PROTECTED]> wrote: > What is the best way for someone who is not very efficient in > mathematics to learn Python, I was turned away from C++ and others > because of the math issue. Ruby has been recommended as well. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Best way to learn python
"Daniel kavic" <[EMAIL PROTECTED]> wrote > What is the best way for someone who is not very efficient in > mathematics to learn Python, You don't need math to program, but it definitely helps and for some problems is essential. But the level of math required is not high, definitely sub college level for most things. As a learning language Python is excellent. There are a multitude of tutorials listed on the Python web site, including mine. Pick one that seems to make sense to you. > I was turned away from C++ and others > because of the math issue. > Ruby has been recommended as well. # Ruby and Python are very similar in many ways, and are growing ever closer in some ways. I personally think Python edges it for a beginner just because there are more books and web sites available, but both are good languages. HTH. -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] about reload
> Actually, if you have IDLE in the default setup on Windows and you > right-click something to edit it, > IDLE doesn't open a subprocess each time a script is executed, so it > will keep the imports in between runs of the program. Hi Luke, Ah, thanks for the correction. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] XML-RPC data transfers.
I might have been unclear, or this tid-bit might have been lost in the
thread... but I'm trying to send directly from ImageGrab.Grab(), without
saving the data as a file. Thats where I'm getting hung... If it try to send
an actual stored file, I have no problem. Is this maybe impossible? My
thought was that I could just save a little process time and file
fragmentation if I cut out the middle man, plus there really is no reason to
save the screen capture on the server side.
Maybe I really need to look into SOAP for this sort of stuff? I'm just
playing with the technology, and from the searching I've done, the XML-RPC
seemed to fit my needs best. I could certainly be wrong though.
Thanks for both of you giving me feedback.
On 12/29/06, Lee Harr <[EMAIL PROTECTED]> wrote:
>http://www.velocityreviews.com/forums/t343990-xmlrpc-send-file.html
>
>Using this example I get error's about 'expected binary .read(), but got
>instance instead.
I assume you are using this ...
>d = xmlrpclib.Binary(open("C:\\somefile.exe").read())
Are you using windows?
I think you would need to pass the binary flag to open ...
imagedata = open(filename, 'rb').read()
It's probably a good idea to use the binary flag if you are expecting
binary data just in case it gets ported somewhere else later.
>I've just been using xmlrpclib and simplexmlrpcserver for this, but I'm
>wondering if I should perhaps use twisted instead.
I've used xml-rpc to send image data before. It worked.
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Re: [Tutor] about reload
On 12/29/06, Danny Yoo <[EMAIL PROTECTED]> wrote: > > Actually, if you have IDLE in the default setup on Windows and you > > right-click something to edit it, > > IDLE doesn't open a subprocess each time a script is executed, so it > > will keep the imports in between runs of the program. > > Hi Luke, > > Ah, thanks for the correction. I got confused now:-> if IDLE keeps the imports in between runs of the program, do I still need import and reload? or click F5 in IDLE is OK? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
