Re: Running a script to build docs from setup.py
On Fri, 10 Jul 2009 11:06:34 +1000 Ben Finney ben+pyt...@benfinney.id.au wrote: Tony Houghton h...@realh.co.uk writes: I've looked through the manual but I can't find any hooks in distutils for generating files at install time other than extension modules and .pyc files. Should I just run the script from somewhere in my setup.py before calling distutils' setup function? Indirectly related: Ian Bicking's article on using Python's ‘setup.py’ as a ‘Makefile’ replacement: URL:http://blog.ianbicking.org/pythons-makefile.html Thanks, but I don't think that adds much to the distutils manual. If one is writing a ‘setup.py’ anyway, I think it makes sense to use that as the build program for the whole project if possible. Good hunting! Yes. Really I only want to write a setup.py because it makes it easier to make a debian package, but the more of the installation that's done by setup.py the better I suppose, then other people might find it useful. -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Running a script to build docs from setup.py
I want to write a setup.py script, using distutils, for a python library called ROX-Lib2 (package name rox). The library includes a script to build HTML documentation from the pydoc strings. I'd like to run that script from setup.py but I don't know the best way to do that. I've looked through the manual but I can't find any hooks in distutils for generating files at install time other than extension modules and .pyc files. Should I just run the script from somewhere in my setup.py before calling distutils' setup function? -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
How to declare python ints in C extensions?
I want to write python wrappers for the Linux DVB API. The underlying
structures and constants may change from time to time, and some of the
constants are generated from macros, so I think it would be better to
write the module in C rather than just copying the constants into pure
python code and using python's ioctl and struct modules.
The trouble is I can't find out how to define a simple python int
variable/constant in a C extension. The docs only seem to tell you how
to define functions/methods and new types.
For example, where the kernel header dvb/frontend.h defines:
typedef enum fe_type {
FE_QPSK,
FE_QAM,
FE_OFDM,
FE_ATSC
} fe_type_t;
I want to make them available as if there was a python module
dvb/frontend.py containing:
FE_QPSK = 0
FE_QAM = 1
FE_OFDM = 2
FE_ATSC = 3
but in real life the module would be dvb/frontendmodule.c.
--
TH * http://www.realh.co.uk
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Re: How to declare python ints in C extensions?
On Sun, 04 Jan 2009 21:05:14 +0100 Christian Heimes li...@cheimes.de wrote: Philip Semanchuk schrieb: This works for me: PyModule_AddIntConstant(module, O_CREAT, O_CREAT); I've had to learn a lot about writing extensions from looking at the Python source code. Lots of valuable tricks to be learned there. Thanks, that's perfect. I see it is documented, but I didn't know where to look. This trick makes it even easier: #ifndef PyModule_AddIntMacro #define PyModule_AddIntMacro(m, c) PyModule_AddIntConstant(m, #c, c) #endif Good idea, but I'm a lot more experienced with C in general than in interfacing it with python, so I already thought of it :-). -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Determining encoding of a file
In Linux it's possible for filesystems to have a different encoding from the system's setting. Given a filename, is there a (preferably) portable way to determine its encoding? -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python Right for Me?
In [EMAIL PROTECTED], Stuart D. Gathman [EMAIL PROTECTED] wrote: On Fri, 02 Feb 2007 15:09:20 -0500, Mister Newbie wrote: I want to make small, 2D games. I have no programming experience. Is Python a good choice? Definitely. I teach a class for 7th to 12th grade where I use this tutorial to introduce programming: http://www.livewires.org.uk/python/ http://www.livewires.org.uk/python/pdfsheets.html As an adult, just skip rapidly through the elementary material. The final module (Games sheets) walks you through creating 3 2D games with pygame! The OP should also look at pygame http://www.pygame.org/ if that isn't what the livewires module is based on. And if it is based on pygame he should look at pygame anyway. -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Determining encoding of a file
In [EMAIL PROTECTED], Ben Finney [EMAIL PROTECTED] wrote: Tony Houghton [EMAIL PROTECTED] writes: In Linux it's possible for filesystems to have a different encoding from the system's setting. Given a filename, is there a (preferably) portable way to determine its encoding? If there were, PEP 263 would not be necessary. URL:http://www.python.org/dev/peps/pep-0263/ It's possible to *guess*, with no guarantee of getting the right answer; but it's far better to be explicitly *told* what the encoding is. That seems to be specific to the encoding used in py source files anyway. What I want to be able to do is guess the encoding of any file for loading into a text editor based on gtksourceview which is pure utf-8. The best I can do is assume it's in the system encoding with locale.getdefaultlocale()[1]. Come to think of it, I wouldn't really be any better off knowing if the filesystem has a diferent encoding anyway because it doesn't necessarily determine what's used in the contents of its files, only its filenames. And Linux at least seems to be able to translate those on the fly. -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
sizeof(struct timeval)
I'm writing a python program which reads input device events so it needs to know sizeof(struct timeval). By using the struct module I should be able to work out sizeof(long) from python, but I can't think of a way to measure non-fundamental types without including a little bit of C, which I'd rather avoid. How safe would I be assuming that sizeof(struct timeval) == 2 * sizeof(long) is always true on Linux on different architectures? AFAIK the input device interface is Linux-specific so I don't need to worry about other OS's. -- The address in the Reply-To is genuine and should not be edited. See http://www.realh.co.uk/contact.html for more reliable contact addresses. -- http://mail.python.org/mailman/listinfo/python-list
Re: sizeof(struct timeval)
In [EMAIL PROTECTED], Big and Blue [EMAIL PROTECTED] wrote: Big and Blue wrote: Tony Houghton wrote: How safe would I be assuming that sizeof(struct timeval) == 2 * sizeof(long) is always true on Linux on different architectures? Based on what I was looking at today (well, yesterday now), you might be wrong. However, it looks as though I was wrong: [Snip headers showing my assumption is correct for his PC too] I've already looked at those headers too. But most of the definitions look like internal types and I'm not confident I can rely on them staying the same size. But I don't think there's a strong enough case for changing them to justify the glibc ABI change etc, so I'm probably safe. -- The address in the Reply-To is genuine and should not be edited. See http://www.realh.co.uk/contact.html for more reliable contact addresses. -- http://mail.python.org/mailman/listinfo/python-list
Re: sizeof(struct timeval)
In [EMAIL PROTECTED],
Big and Blue [EMAIL PROTECTED] wrote:
Tony Houghton wrote:
How safe would I be assuming that
sizeof(struct timeval) == 2 * sizeof(long)
is always true on Linux on different architectures?
Based on what I was looking at today (well, yesterday now), you might
be wrong.
I do know that the size of a struct utmp differs between a Linux
Itanium system and a Linux x86_64 system, and I seem to recall it migh be
related to timeval. I could be wrong - I wasn't interested in the timeval
part - but this part of the bits/utmp.h include file indicates the issue:
So is __WORDSIZE_COMPAT32 defined for one of Itanium or x86_64 but not
the other? The comment in the code below implies the opposite of what
you're saying: the size in 64-bit mode has to be the same as in 32-bit
mode, and as both CPUs have the same 32-bit architecture they should
therefore both use the same sized struct in 64-bit mode.
In any case, it does imply that timeval can be relied on to be 2 *
32-bits (2 * long) in 32-bit architectures and something else in 64-bit
architectures - where long is 64-bit.
/* The ut_session and ut_tv fields must be the same size when compiled
32- and 64-bit. This allows data files and shared memory to be
shared between 32- and 64-bit applications. */
#if __WORDSIZE == 64 defined __WORDSIZE_COMPAT32
int32_t ut_session; /* Session ID, used for windowing. */
struct
{
int32_t tv_sec; /* Seconds. */
int32_t tv_usec;/* Microseconds. */
} ut_tv; /* Time entry was made. */
#else
long int ut_session; /* Session ID, used for windowing. */
struct timeval ut_tv; /* Time entry was made. */
#endif
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Re: Finding where to store application data portably
Ron Adam wrote: Tony Houghton wrote: I'm using pygame to write a game called Bombz which needs to save some data in a directory associated with it. In Unix/Linux I'd probably use ~/.bombz, in Windows something like C:\Documents And Settings\user\Applicacation Data\Bombz. There are plenty of messages in the archives for this group about how to find the correct location in Windows, but what about Mac OS? There I don't know the correct location for this sort of thing at all. And there are other, more obscure systems like RISC OS (it may not have pygame but it definitely has python). Surely this is something that's crying out for an official function in os or sys. This works on Win XP. Not sure if it will work on Linux. import os parent = os.path.split(os.path.abspath(os.sys.argv[0]))[0] file = parent + os.sep + '.bombz' Ooh, no, I don't want saved data to go in the installation directory. In general that practice encourages people to run with Admin access, and it's about time Windows users were discouraged from that. -- The address in the Reply-To is genuine and should not be edited. See http://www.realh.co.uk/contact.html for more reliable contact addresses. -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding where to store application data portably
In [EMAIL PROTECTED], Ron Adam [EMAIL PROTECTED] wrote: Tony Houghton wrote: This works on Win XP. Not sure if it will work on Linux. import os parent = os.path.split(os.path.abspath(os.sys.argv[0]))[0] file = parent + os.sep + '.bombz' Ooh, no, I don't want saved data to go in the installation directory. In general that practice encourages people to run with Admin access, and it's about time Windows users were discouraged from that. Yes, it occurred to me you didn't want to do that after I posted. Looks like maybe the correct place would be as you suggested, but maybe doing it this way would be better. import os user = os.path.join( os.environ[USERPROFILE], 'Application Data', 'Bombz' ) I like that, it's nice and simple. It doesn't look like it's supported on Win 9x though, but on 9x using the installation directory would be acceptable. -- The address in the Reply-To is genuine and should not be edited. See http://www.realh.co.uk/contact.html for more reliable contact addresses. -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding where to store application data portably
Steven D'Aprano wrote:
On Tue, 20 Sep 2005 23:03:52 +0100, Tony Houghton wrote:
I'm using pygame to write a game called Bombz which needs to save some
data in a directory associated with it. In Unix/Linux I'd probably use
~/.bombz, in Windows something like
C:\Documents And Settings\user\Applicacation Data\Bombz.
In Windows, you shouldn't hard-code the drive letter. I don't know
how you
find out what the correct value is, but hard-coding it is just Bad.
That's why I said something like. It seems there is a definitive way
of finding the correct value, but it needs extra W32 extensions
installed. You could also start from os.path.expanduser('~') I suppose.
As a Linux user, I really am sick of every damn application, script and
program under the sun filling the top level of my home directory with
dot-files.
I wish the Linux Standard Base folks would specify that settings files
should all go into a subdirectory like ~/settings rather than filling up
the home directory with cruft. That was acceptable in the days when
people
only looked at their files with ls, but in these days of GUI file
managers, it is ridiculous that there are more than 100 dot files and
directories in my home directory.
Don't all file managers have an option to hide files beginning with '.'?
tilting at windmills
Can I ask developers to break with the obsolete and annoying habit of
creating user-specific config files as ~/.app-name and use
~/settings/app-name instead?
/tilting at windmills
You'll probably like the XDG basedir spec then:
http://freedesktop.org/wiki/Standards_2fbasedir_2dspec
I suppose I should really use that, but the trouble is it can be very
difficult to decide whether some files are config or data, so it would
be nice to have a standard that doesn't segregate the two.
Thanks to everyone else who's replied. I've saved Trent Mick's script
for later reference.
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The address in the Reply-To is genuine and should not be edited.
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addresses.
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Intermediate to expert book
Can anyone recommend a good book for intermediate up to expert level? I'm an experienced C programmer and I learnt Python from the Learning Python O'Reilly book because it had good reviews. I was disappointed though. It was difficult to read because it was so verbose. It would sometimes take more than a page to explain something where all the information I needed could have been conveyed in one sentence. If anyone's seen Leendert Ammeraal's C For Programmers, that's more the sort of style I'm after. Something that covers 2.3 and preferably even 2.4 would be a bonus. I've heard good things about Dive Into Python. I see it can be downloaded or read online, and on a very quick browse it seems to be suitably to the point and cover some useful stuff that was missing from or too deeply buried in Learning Python. I find it easier to read printed material though, so I'd consider buying it. What sort of opinions do people here have of it? -- The address in the Reply-To is genuine and should not be edited. See http://www.realh.co.uk/contact.html for more reliable contact addresses. -- http://mail.python.org/mailman/listinfo/python-list
Finding where to store application data portably
I'm using pygame to write a game called Bombz which needs to save some data in a directory associated with it. In Unix/Linux I'd probably use ~/.bombz, in Windows something like C:\Documents And Settings\user\Applicacation Data\Bombz. There are plenty of messages in the archives for this group about how to find the correct location in Windows, but what about Mac OS? There I don't know the correct location for this sort of thing at all. And there are other, more obscure systems like RISC OS (it may not have pygame but it definitely has python). Surely this is something that's crying out for an official function in os or sys. -- The address in the Reply-To is genuine and should not be edited. See http://www.realh.co.uk/contact.html for more reliable contact addresses. -- http://mail.python.org/mailman/listinfo/python-list
