ActivePython archive @ ASPN

Q: converting 24 bit signed to float32?

Ray Schumacher (rays@...)

I have been working with 24 bit ADC data
returned from pyUSB as byte-tuples, which I need to convert to Float32 and save, I
currently do it like this:

WRAP = 2.**23
BITS24 = 2.**24
data = []
for byteN in range(0, len(dataTuple), 3):
	    try:
		chValue = struct.unpack(">I", 
				  struct.pack(">4b", 0,*dataTuple[byteN:byteN+3])
				)[0]
	    except:
		chValue = 0
	    if chValue>WRAP: 
		chValue = ((BITS24-chValue) / WRAP)
	    else:
		chValue = (-chValue / WRAP)
	    data[thisCh].append(chValue)
return data


It is really slow...
I have not been able to come up with a trick way to do it in numpy, either.
What is really needed is a 24 bit type, or at least a type-cast ability to go to Float32,
in core; all of the latest sound cards are now 24 bit, so the demand should be coming.
http://www.koders.com/c/fid2226C89ED85B3FF15286288F7CF31CD8647CDD79.aspx
for instance, is an LGPL C module for working with them.

Cheers,
Ray

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Re: [Pythonmac-SIG] Installing wxPython with ActivePython and OSX

Trent Mick (trentm@...)

[Trent]
> >wxPython on the Mac seems to be painful right now.

[Kevin Ollivier wrote]
> Suggestions and contributions welcome! :-)

My apologies, I was being unfairly brief.
Some suggestions:

- A review of the Mac OS X-related text on
      http://www.wxpython.org/download.php
  Some of that info is misleading:

  '''wxPythonOSX needs a "Framework" build of Python 2.3, also known as
  MacPython-OSX.'''

  To be fair explaining the myriad Python's out there for Mac OS X is
  hard. This sentence though connotes the wrong thing: that wxPython is
  only available for Python 2.3.

  '''If you would like to try Python 2.4.x on Panther or Tiger then you
  can get an installer here'''

  Again, to be fair, giving a download link for the current Python for
  Mac OS X (whatever that really means) is a moving target. There *is* a
  Python installer at that link, but it is no longer a recommended one.

  As well, some mention of the x86 arch issues would be helpful for
  users.

Okay, *one* suggestion. :) I don't currently use wxPython at all.


> >1. You need to get the correct build for your version of Python. For
> >   ActivePython 2.4.x or MacPython 2.4.x that means getting one of the
> >   builds with "-py24" in the package name.
> 
> Of course, this is pretty much the same as with every other (binary)	
> Python extension, isn't it?

Yes, I didn't mean to imply that wxPython is special here.


> >2. They have "ansi" and "unicode" builds. From what I can tell the
> >   "ansi" builds are probably only useful for Mac OS X 10.2.x
> >   compatibility. If you are using Mac OS X 10.3 (Jaguar) or greater
> >   then I'd stick with the "unicode" builds.
> 
> The ansi builds are for people who haven't considered Unicode support  
> when building their wxPython apps, and thus might have issues when  
> their data is automatically converted to and from Unicode. In ansi  
> mode, it just passes the actual 'bytes' around, so the user is in  
> total control over how the data is encoded. It took me a couple days	
> of auditing my codebase before I got everything working with Unicode,  
> and while I'm glad I did, up until that point I (and users of my app)  
> were doing just fine with ANSI builds.
> 
> But yes, in general, Unicode is the recommended build on OS X, or any  
> modern platform for that matter.

If that is the case then I'd suggest having the link to the unicode
build the only obvious one. Those requiring ANSI builds can be pointed
to the SF.net "Files" page and/or a Unicode vs. ANSI wiki page.

The current http://wiki.wxpython.org/index.cgi/UnicodeBuild, which *is*
linked to there, probably already does a good job here.


> There aren't any Intel-only binaries, but packages containing  
> Universal binaries (built using the Universal MacPython Framework)  
> was finished up late last week and are just awaiting being uploaded  
> to the wxPython SF site. So it should be pretty soon.

That's good news.


> >   Unfortunately I was also able to *install* it on Mac OS X 10.4/
> >   Intel but it doesn't work (importing "wx" fails) because the
> >   binary modules in wx are for ppc while the running Python is x86.
> 
> Right. About the only thing we could do at this point is to add a  
> command-line check on the architecture of the Python binary and bomb	
> out if it's incorrect. I could go ahead and add such a test, although  
> I think the OS X Installer will just give a generic "you are not  
> allowed to install this package" message, which is arguably just as  
> confusing to the user.... We could also add ppc to the filename,  
> though I think it will easily be missed.

Yah, Apple's packaging tools are a pain. Great for braindead simple
stuff, but quite limiting for anything custom.


Trent

-- 
Trent Mick
TrentM@...
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Re: Installing wxPython with ActivePython and OSX

Troy Rollins (troy_lists@...)

On Apr 17, 2006, at 2:44 PM, Trent Mick wrote:

> wxPython on the Mac seems to be painful right now.
>
> 1. You need to get the correct build for your version of Python. For
>    ActivePython 2.4.x or MacPython 2.4.x that means getting one of the
>    builds with "-py24" in the package name.

Thanks for the prompting Trent (Bob, and others). I have this working  
now. The download I used is named -

wxPython2.6-osx-unicode-2.6.3.2-macosx10.3-py2.4.dmg

The link to the proper file is:

--
Troy
RPSystems, Ltd.
http://www.rpsystems.net

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Re: Installing wxPython with ActivePython and OSX

Trent Mick (trentm@...)

[Thomas Juntunen wrote]
> > I'm trying to get wxPython going with ActivePython, Komodo and
> > OSX.4.6
> > 
> > The wx installer is installing to my framework "system" python (Apple
> > 2.3.5)
> > 
> > Is there any way to get this to work with my setup?

wxPython on the Mac seems to be painful right now.

1. You need to get the correct build for your version of Python. For
   ActivePython 2.4.x or MacPython 2.4.x that means getting one of the
   builds with "-py24" in the package name.

2. They have "ansi" and "unicode" builds. From what I can tell the
   "ansi" builds are probably only useful for Mac OS X 10.2.x
   compatibility. If you are using Mac OS X 10.3 (Jaguar) or greater
   then I'd stick with the "unicode" builds.

> There are lots of packages available as pre-built binaries for Python 2.4.x
> on Tiger available here:
> 
> http://pythonmac.org/packages/

3. There don't seem to be builds of wxPython for Mac OS X/Intel
   anywhere. The builds that they have up here for Mac OS X

    http://www.wxpython.org/download.php#binaries

   are for the PowerPC architecture. I'm not on the wxPython mailing
   lists so I don't know if there are Mac OS X/Intel builds hiding
   somewhere or in the works.

   I was able to install wxPython for Python 2.4:
	wxPython2.6-osx-unicode-2.6.3.2-macosx10.3-py2.4.dmg
   on Mac OS X 10.3/PowerPC and use it (only minor testing).

   Unfortunately I was also able to *install* it on Mac OS X 10.4/Intel
   but it doesn't work (importing "wx" fails) because the binary modules
   in wx are for ppc while the running Python is x86.

It looks like using wxPython on Mac OS X/Intel requires you to compile
it yourself from source:

    http://sourceforge.net/project/showfiles.php?group_id=10718
	wxPython-src-2.6.3.2.tar.gz

Cheers,
Trent

-- 
Trent Mick
TrentM@...
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Re: ANN: ActivePython 2.4.3.12 is now available (bugfix for Windows)

Trent Mick (trentm@...)

[Rick Rankin wrote]
> Thanks. I only looked at the page. When I saw .11, I never tried to
> download. I just downloaded and it was, indeed, .12.

[Carlos wrote]
> It's already there. The page says ".11", but the windows version is
> already ".12".

Thanks for pointing this out. Originally I had just not bothered with
updating the "latest version" on the web site pages because only the
Windows builds were updated to version ".12". Bad choice. :) We'll
update the listed version soon.

Cheers,
Trent

-- 
Trent Mick
TrentM@...
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Re: ANN: ActivePython 2.4.3.12 is now available (bugfix for Windows)

Rick Rankin (rrankin1424-aspn@...)

Thanks. I only looked at the page. When
I saw .11, I never tried to download. I just downloaded and it was, indeed, .12.

--Rick

----- Original Message ----
From: Carlos Rodrigues  Out of curiosity, how long would you expect it to be before this hits the web site? So
far, .11 is still the only version available for download.
>
> --Rick
>
> ----- Original Message ----
> From: Trent Mick  To: activepython@...
> Sent: Wednesday, April 12, 2006 2:46:08 PM
> Subject: ANN: ActivePython 2.4.3.12 is now available (bugfix for Windows)
>
>
> I'm happy to announce that ActivePython 2.4.3.12 builds for Windows are
> now available for free download from:
>     http://www.ActiveState.com/Products/ActivePython/
>
> This is a bug fix release to for one Windows issue:
> - Fix a bug that results in ".pyo" and ".pyc" being placed on the
>   PATHEXT environment variable before ".py" for clean installs. Bug
>   33311. This can cause surprises for command-line usage for Python
>   scripts when not specifying the ".py" extension. The new installer
>   will fix PATHEXT on machines that hit this bug. See this thread for
>   more details:
>	http://tinyurl.com/poyhp
>
> If you use ActivePython on any other platform, 2.4.3.11 is still the
> latest build.
>
>
> What is ActivePython?
> ---------------------
>
> ActivePython is ActiveState's quality-assured binary distribution of
> Python. Builds for AIX, HP-UX, Linux, Mac OS X, Solaris, and Windows
> are made freely available.
>
> ActivePython includes the Python core and core extensions (zlib 1.2.3,
> bzip2 1.0.3, bsddb 4.2.52.NC, Tk 8.4.12, and Tix 8.1.4) and is fully
> compatible with other Python distributions of the same version.
>
> ActivePython also includes a wealth of Python documentation, including:
> - the core Python docs;
> - Andrew Kuchling's "What's New in Python" series;
> - the Non-Programmer's Tutorial for Python;
> - Mark Pilgrim's excellent "Dive into Python"; and
> - a snapshot of the Python FAQs, HOWTOs, and PEPs.
>
> An online version of the docs can be found here:
>     http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/welcome.html
>
> We would welcome any and all feedback to:
>     ActivePython-feedback@...
>
> Please file bugs against ActivePython at:
>     http://bugs.ActiveState.com/ActivePython
>
>
> On what platforms does ActivePython run?
> ----------------------------------------
>
> ActivePython now includes installers for the following ten platforms:
>
> - AIX/PowerPC
> - HP-UX/PA-RISC
> - Linux/x86
> - Linux/x86_64: "x86_64" is also known as "AMD64"
> - Solaris/SPARC
> - Solaris/x86
> - Mac OS X/PowerPC
> - Mac OS X/x86
> - Windows/x64: "x64" is also known as "AMD64"
> - Windows/x86
>
>
> Extra Bits
> ----------
>
> ActivePython releases also include the following packages:
>
> - Windows "debug" package: Debug-built binaries for ActivePython
>   users building debug versions of their binary Python extensions.
> - ActivePython24.chm: An MS compiled help collection of the full
>   ActivePython documentation set. Linux users of applications such as
>   xCHM might find this useful. This package is installed by default on
>   Windows.
>
> These packages are available from:
>     ftp://ftp.activestate.com/ActivePython/etc/
>
>
> Thanks, and enjoy!
>
> Trent, Python Tech Lead
>
> --
> Trent Mick
> TrentM@...
> _______________________________________________
> ActivePython mailing list
> ActivePython@...
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>
>
>
>
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>
>


--
Carlos Rodrigues



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Re: ANN: ActivePython 2.4.3.12 is now available (bugfix for Windows)

Carlos Rodrigues (carlos.efr@...)

It's already there. The page says ".11",
but the windows version is
already ".12".

On 4/15/06, Rick Rankin  Out of curiosity, how long would you expect it to be before this hits the web site? So
far, .11 is still the only version available for download.
>
> --Rick
>
> ----- Original Message ----
> From: Trent Mick  To: activepython@...
> Sent: Wednesday, April 12, 2006 2:46:08 PM
> Subject: ANN: ActivePython 2.4.3.12 is now available (bugfix for Windows)
>
>
> I'm happy to announce that ActivePython 2.4.3.12 builds for Windows are
> now available for free download from:
>     http://www.ActiveState.com/Products/ActivePython/
>
> This is a bug fix release to for one Windows issue:
> - Fix a bug that results in ".pyo" and ".pyc" being placed on the
>   PATHEXT environment variable before ".py" for clean installs. Bug
>   33311. This can cause surprises for command-line usage for Python
>   scripts when not specifying the ".py" extension. The new installer
>   will fix PATHEXT on machines that hit this bug. See this thread for
>   more details:
>	http://tinyurl.com/poyhp
>
> If you use ActivePython on any other platform, 2.4.3.11 is still the
> latest build.
>
>
> What is ActivePython?
> ---------------------
>
> ActivePython is ActiveState's quality-assured binary distribution of
> Python. Builds for AIX, HP-UX, Linux, Mac OS X, Solaris, and Windows
> are made freely available.
>
> ActivePython includes the Python core and core extensions (zlib 1.2.3,
> bzip2 1.0.3, bsddb 4.2.52.NC, Tk 8.4.12, and Tix 8.1.4) and is fully
> compatible with other Python distributions of the same version.
>
> ActivePython also includes a wealth of Python documentation, including:
> - the core Python docs;
> - Andrew Kuchling's "What's New in Python" series;
> - the Non-Programmer's Tutorial for Python;
> - Mark Pilgrim's excellent "Dive into Python"; and
> - a snapshot of the Python FAQs, HOWTOs, and PEPs.
>
> An online version of the docs can be found here:
>     http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/welcome.html
>
> We would welcome any and all feedback to:
>     ActivePython-feedback@...
>
> Please file bugs against ActivePython at:
>     http://bugs.ActiveState.com/ActivePython
>
>
> On what platforms does ActivePython run?
> ----------------------------------------
>
> ActivePython now includes installers for the following ten platforms:
>
> - AIX/PowerPC
> - HP-UX/PA-RISC
> - Linux/x86
> - Linux/x86_64: "x86_64" is also known as "AMD64"
> - Solaris/SPARC
> - Solaris/x86
> - Mac OS X/PowerPC
> - Mac OS X/x86
> - Windows/x64: "x64" is also known as "AMD64"
> - Windows/x86
>
>
> Extra Bits
> ----------
>
> ActivePython releases also include the following packages:
>
> - Windows "debug" package: Debug-built binaries for ActivePython
>   users building debug versions of their binary Python extensions.
> - ActivePython24.chm: An MS compiled help collection of the full
>   ActivePython documentation set. Linux users of applications such as
>   xCHM might find this useful. This package is installed by default on
>   Windows.
>
> These packages are available from:
>     ftp://ftp.activestate.com/ActivePython/etc/
>
>
> Thanks, and enjoy!
>
> Trent, Python Tech Lead
>
> --
> Trent Mick
> TrentM@...
> _______________________________________________
> ActivePython mailing list
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>
>
>
>
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>


--
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Re: ANN: ActivePython 2.4.3.12 is now available (bugfix for Windows)

Rick Rankin (rrankin1424-aspn@...)

Out of curiosity, how long would you
expect it to be before this hits the web site? So far, .11 is still the only version
available for download.

--Rick

----- Original Message ----
From: Trent Mick

Re: Installing wxPython with ActivePython and OSX

Troy Rollins (troy_lists@...)

On Apr 14, 2006, at 10:34 AM, Thomas Juntunen wrote:

> Hmmm. Maybe all you need do is make sure /usr/local/bin comes before
> /usr/bin on your path? Then maybe Komodo and everything else will  
> do the
> right thing.

(@... sorry for sending to you offlist, I didn't realize this  
list set the reply-to address to the original author instead of the  
list.)

This is precisely the area which seems a bit tricky on the Mac right  
now. It seems the system retains many versions of $PATH, depending on  
what is asking. Modifying things like ~/.bash_profile change the path  
for the bash sessions, but not universally. Things like ~/.bashrc and  
~/.profile don't ever seem to get run, while /etc/.profile do, but  
they don't like to be modified. I'm not sure if I should force them.

Eventually, I got around to modifying the ~/.MacOSX/environment.plist  
which seems to modify the $PATH globally (at least Komodo now sees it  
properly) but the wx installer still goes to the wrong place.

Having been a Mac user for years, I'm not much of a Unix guru either.  
I'm trying to pick it up, but the information regarding how this all  
works in OSX is scattered, and in many cases, just wrong.

I've joined the MacPython list (again). I had been on it a couple of  
years ago, when I first tried Python, but dropped out of that attempt  
at Python because I really wanted to work in a nice IDE and under OSX  
- Komodo for OSX didn't exist at the time. We'll see if they can shed  
some light.

Again, thanks for the input.

--
Troy
RPSystems, Ltd.
http://www.rpsystems.net

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Re: Installing wxPython with ActivePython and OSX

Thomas Juntunen (juntunen@...)

On 4/13/2006 15:41, "Troy Rollins"
 I'm trying to get wxPython going with ActivePython, Komodo and OSX.4.6
> 
> The wx installer is installing to my framework "system" python (Apple
> 2.3.5)
> 
> Is there any way to get this to work with my setup?


There are lots of packages available as pre-built binaries for Python 2.4.x
on Tiger available here:

http://pythonmac.org/packages/

I'm pretty sure there is one for wxPython, although I'm not sure if they
have a universal version available. The one intended for Python 2.4.x should
do what you want.

HTH,
Thomas Juntunen


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