Trying to understand 'import' a bit better
Hi all I have been using 'import' for ages without particularly thinking about it - it just works. Now I am having to think about it a bit harder, and I realise it is a bit more complicated than I had realised - not *that* complicated, but there are some subtleties. I don't know the correct terminology, but I want to distinguish between the following two scenarios - 1. A python 'program', that is self contained, has some kind of startup, invokes certain functionality, and then closes. 2. A python 'library', that exposes functionality to other python programs, but relies on the other program to invoke its functionality. The first scenario has the following characteristics - - it can consist of a single script or a number of modules - if the latter, the modules can all be in the same directory, or in one or more sub-directories - if they are in sub-directories, the sub-directory must contain __init__.py, and is referred to as a sub-package - the startup script will normally be in the top directory, and will be executed directly by the user When python executes a script, it automatically places the directory containing the script into 'sys.path'. Therefore the script can import a top-level module using 'import ', and a sub-package module using 'import .'. The second scenario has similar characteristics, except it will not have a startup script. In order for a python program to make use of the library, it has to import it. In order for python to find it, the directory containing it has to be in sys.path. In order for python to recognise the directory as a valid container, it has to contain __init__.py, and is referred to as a package. To access a module of the package, the python program must use 'import .' (or 'from import '), and to access a sub-package module it must use 'import ... So far so uncontroversial (I hope). The subtlety arises when the package wants to access its own modules. Instead of using 'import ' it must use 'import .'. This is because the directory containing the package is in sys.path, but the package itself is not. It is possible to insert the package directory name into sys.path as well, but as was pointed out recently, this is dangerous, because you can end up with the same module imported twice under different names, with potentially disastrous consequences. Therefore, as I see it, if you are developing a project using scenario 1 above, and then want to change it to scenario 2, you have to go through the entire project and change all import references by prepending the package name. Have I got this right? Frank Millman -- http://mail.python.org/mailman/listinfo/python-list
Jython callable. How?
Hi. How exactly jython decides is object callable or not? I defined __call__ method but interpreter says it's still not callable. BTW, my code works in cpython -- http://mail.python.org/mailman/listinfo/python-list
Re: Jython callable. How?
On Mar 4, 2012 9:04 AM, "Sirotin Roman" wrote: > > Hi. > How exactly jython decides is object callable or not? I defined > __call__ method but interpreter says it's still not callable. > BTW, my code works in cpython It will help if you show us the code. -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: Jython callable. How?
On Sun, 04 Mar 2012 16:03:56 +0700, Sirotin Roman wrote: > Hi. > How exactly jython decides is object callable or not? I defined __call__ > method but interpreter says it's still not callable. BTW, my code works > in cpython Works for me. steve@runes:~$ jython *sys-package-mgr*: processing modified jar, '/usr/share/java/servlet- api-2.5.jar' Jython 2.5.1+ (Release_2_5_1, Aug 4 2010, 07:18:19) [OpenJDK Client VM (Sun Microsystems Inc.)] on java1.6.0_18 Type "help", "copyright", "credits" or "license" for more information. >>> >>> class Test: ... def __call__(self): ... return 42 ... >>> >>> x = Test() >>> x() 42 Perhaps if you show us what you actually do, and what happens, we might be able to tell you what is happening. Please COPY AND PASTE the full traceback. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
How to convert simple B/W graphic to the dot matrix for the LED display/sign
I would like to convert simple B/W graphic to the 432x64 pixel matrix. It is intended to display this graphic on the one color LED matrix sign/display (432 LEDs width, 64 LEDs height). I am experimenting with the PIL, but I did not find solution there. It will be really helpful If somebody here can show me the direction to go? Regards Petr -- http://mail.python.org/mailman/listinfo/python-list
Re: How to convert simple B/W graphic to the dot matrix for the LED display/sign
On Sun, 04 Mar 2012 02:28:16 -0800, Petr Jakes wrote: > I would like to convert simple B/W graphic to the 432x64 pixel matrix. > It is intended to display this graphic on the one color LED matrix > sign/display (432 LEDs width, 64 LEDs height). I am experimenting with > the PIL, but I did not find solution there. > > It will be really helpful If somebody here can show me the direction to > go? What file format is the graphic in? How big is it? What file format do you want it to be? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: A possible change to decimal.Decimal?
On Friday, March 2, 2012 6:49:39 PM UTC-5, Ethan Furman wrote: > Jeff Beardsley wrote: > > HISTORY: ... > > What you should be doing is: > >import decimal >from decimal import Decimal > >reload(decimal) >Decimal = decimal.Decimal # (rebind 'Decimal' to the reloaded code) > > ~Ethan~ Agree that's how the import should be done. On the other hand, removing gratuitous use of isinstance() is generally a Good Thing. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to convert simple B/W graphic to the dot matrix for the LED display/sign
> What file format is the graphic in? How big is it? > > What file format do you want it to be? > Now, I am able to create the png file with the resolution 432x64 using PIL (using draw.text method for example). I would like to get the 432x64 True/False (Black/White) lookup table from this file, so I can switch LEDs ON/OFF accordingly. -- Petr -- http://mail.python.org/mailman/listinfo/python-list
Re: Porting Python to an embedded system
Justin Drake, 04.03.2012 11:58: > I am working with an ARM Cortex M3 on which I need to port Python > (without operating system). What would be my best approach? I just > need the core Python and basic I/O. The "without operating system" bit should prove problematic. Can't you just install Linux on it? Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Porting Python to an embedded system
On Sun, Mar 4, 2012 at 5:58 AM, Justin Drake wrote: > I am working with an ARM Cortex M3 on which I need to port Python > (without operating system). What would be my best approach? I just > need the core Python and basic I/O. How much time are you willing to budget to this? Porting something to bare metal is not a small task. It's probably only worth it if you're doing it for academic purposes. I expect for anything real-world it'd be faster to do whatever it is you want to do using something that already runs on the bare metal. (e.g. http://armpit.sourceforge.net/ for Scheme). There used to be Flux OSKit ( http://www.cs.utah.edu/flux/oskit/ ) for porting languages to bare metal, but it doesn't support ARM and it's been dead a while. If you're really set on this, I'd try to see if there's something similar out there, somewhere. 'cause writing an OS from scratch would suck. -- Devin -- http://mail.python.org/mailman/listinfo/python-list
Re: Porting Python to an embedded system
On Sunday, March 4, 2012 4:58:50 AM UTC-6, Justin Drake wrote: > I am working with an ARM Cortex M3 on which I need to port Python > (without operating system). What would be my best approach? I just > need the core Python and basic I/O. The python-on-a-chip project (p14p) (http://code.google.com/p/python-on-a-chip/) might be something worth looking into. Thanks, Duane -- http://mail.python.org/mailman/listinfo/python-list
Re: How to convert simple B/W graphic to the dot matrix for the LED display/sign
Petr Jakes wrote:
>
>> What file format is the graphic in? How big is it?
>>
>> What file format do you want it to be?
>>
>
> Now, I am able to create the png file with the resolution 432x64
> using PIL (using draw.text method for example).
>
> I would like to get the 432x64 True/False (Black/White) lookup
> table from this file, so I can switch LEDs ON/OFF accordingly.
>
> --
> Petr
>
The convert and load methods are one way to do it:
>>> import Image
>>> im=Image.new('L', (100,100))
>>> im=im.convert('1')
>>> px=im.load()
>>> px[0,0]
0
That's the numeral one in the argument to convert. The load method
returns a pixel access object.
Max
--
http://mail.python.org/mailman/listinfo/python-list
Re: Jython callable. How?
> Perhaps if you show us what you actually do, and what happens, we might
> be able to tell you what is happening. Please COPY AND PASTE the full
> traceback.
Here is my code:
# Trying to make callable staticmethod
class sm(staticmethod):
def __call__(self, *args, **kwargs):
""" I know here is one more potential problem, because object
passed instead of real class """
return self.__get__(None, object)(*args, **kwargs)
issubclass(sm, Callable)
class Foo(object):
@sm
def bar():
print("ololo")
print("inside", bar, callable(bar), bar())
if __name__=="__main__":
print("class outise", Foo.bar, callable(Foo.bar), Foo.bar())
f = Foo()
print("instance outside", f.bar, callable(f.bar), f.bar())
cpython output:
ololo
('inside', <__main__.sm object at 0xb72b404c>, True, None)
ololo
('class outise', , True, None)
ololo
('instance outside', , True, None)
jython output:
Traceback (most recent call last):
File "sm.py", line 17, in
class Foo(object):
File "sm.py", line 23, in Foo
print("inside", bar, callable(bar), bar())
TypeError: 'staticmethod' object is not callable
--
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Re: The original command python line
On 2012-03-04, Chris Rebert wrote: > On Sat, Mar 3, 2012 at 9:38 PM, Damjan Georgievski wrote: >> How can I get the *really* original command line that started my python >> interpreter? > On Linux, you can read from: > /proc//cmdline > to get the null-delimited "command line". And if what you want is your own command line, you can replace with self: /proc/self/cmdline -- Grant -- http://mail.python.org/mailman/listinfo/python-list
AttributeError: 'module' object has no attribute 'logger'
hi all, when installing sage, there is a problem with emacs.py so, this screen appeared after rynning ./sage -- | Sage Version 4.4.2, Release Date: 2010-05-19 | | Type notebook() for the GUI, and license() for information.| -- Traceback (most recent call last): File "/home/zid/sage/local/bin/sage-ipython", line 18, in import IPython File "/usr/lib/python2.7/dist-packages/IPython/__init__.py", line 58, in __import__(name,glob,loc,[]) File "/usr/lib/python2.7/dist-packages/IPython/ipstruct.py", line 17, in from IPython.genutils import list2dict2 File "/usr/lib/python2.7/dist-packages/IPython/genutils.py", line 114, in import IPython.rlineimpl as readline File "/usr/lib/python2.7/dist-packages/IPython/rlineimpl.py", line 18, in from pyreadline import * File "/usr/local/lib/python2.7/dist-packages/pyreadline-2.0_dev1- py2.7.egg/pyreadline/__init__.py", line 11, in from . import unicode_helper, logger, clipboard, lineeditor, modes, console File "/usr/local/lib/python2.7/dist-packages/pyreadline-2.0_dev1- py2.7.egg/pyreadline/modes/__init__.py", line 3, in from . import emacs, notemacs, vi File "/usr/local/lib/python2.7/dist-packages/pyreadline-2.0_dev1- py2.7.egg/pyreadline/modes/emacs.py", line 11, in import pyreadline.logger as logger AttributeError: 'module' object has no attribute 'logger' any one can help me pleas regards Zid -- http://mail.python.org/mailman/listinfo/python-list
Re: A possible change to decimal.Decimal?
A. Lloyd Flanagan wrote: On Friday, March 2, 2012 6:49:39 PM UTC-5, Ethan Furman wrote: Jeff Beardsley wrote: HISTORY: ... What you should be doing is: import decimal from decimal import Decimal reload(decimal) Decimal = decimal.Decimal # (rebind 'Decimal' to the reloaded code) ~Ethan~ Agree that's how the import should be done. On the other hand, removing gratuitous use of isinstance() is generally a Good Thing. Gratuitous use? How is it gratuitous for an class to check that one of its arguments is its own type? class Frizzy(object): def __add__(self, other): if not isinstance(other, Frizzy): return NotImplemented do_stuff_with(self, other) This is exactly what isinstance() is for, and this is how it is being used in Decimal.__init__(). ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: A possible change to decimal.Decimal?
Jeff Beardsley wrote: The problem with that though: I am not calling reload(), except to recreate the error as implemented by the web frameworks. I am also unlikely to get a patch accepted into several different projects, where this is ONE project, and it's a simple change Simple -- maybe. Appropriate -- no. It is unfortunate that those frameworks have that bug, but it is not up to Decimal to fix it for them. ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
RE: Python - CGI-BIN - Apache Timeout Problem
Thanks Chris,
I isolated it using logging
import logging
logging.basicConfig(filename="test3.log", level=logging.INFO)
then logging.info('sniffer got to point A')
and going through my code until I isolated the problem to a function with scapy
called sniff. For some reason this function operates very weirdly on FreeBSD9.
I have already submitted an email to the scapy mailing list. Going to try to
replicate this on Fedora but I doubt I will see this problem. Even from the
command line the sniff() function is not working correctly on FreeBSD 9.
-S
-Original Message-
From: ch...@rebertia.com [mailto:ch...@rebertia.com] On Behalf Of Chris Rebert
Sent: Friday, March 02, 2012 3:23 PM
To: Sean Cavanaugh (scavanau)
Cc: python-list@python.org
Subject: Re: Python - CGI-BIN - Apache Timeout Problem
On Fri, Mar 2, 2012 at 12:09 PM, Sean Cavanaugh (scavanau)
wrote:
> THE PROBLEM:
>
> When I execute the scripts from the command line (#python main.py) it
> generates it fine (albeit slowly), it prints all the html code out including
> the script. The ‘core’ part of the script dumbed down to the lowest level
> is->
>
> proc = subprocess.Popen(['/usr/local/bin/python', 'tests.py'],
> stdout=subprocess.PIPE)
> output = proc.stdout.read()
Note the red warning box about possible deadlock with .stdout.read()
and friends:
http://docs.python.org/library/subprocess.html#popen-objects
> print output
> proc.stdout.close()
As the docs advise, try using .communicate()
[http://docs.python.org/library/subprocess.html#subprocess.Popen.communicate
] instead:
proc = subprocess.Popen(…)
out, err = proc.communicate()
print out
> When I open main.py and execute the script it just hangs… it seems to
> execute the script (I see pcap fires on the interface that I am testing on
> the firewall) but its not executing correctly… or loading the entire
> webpage…the webpage keeps chugging along and eventually gives me an error
> timeout.
The hanging makes me suspect that the aforementioned deadlock is occurring.
Cheers,
Chris
--
http://chrisrebert.com
--
http://mail.python.org/mailman/listinfo/python-list
python25.dll
I don't know if anyone has sent this in before. > I loaded the current version of Python on my computer to learn the > programming and, I believe, it helps my Blender to work. Anyway, > occassionally, I get an error on the screen, before I have started running > programs, that states "python25.dll" will not load or does not exist. > I have removed Python from my system to stop this error. > Anything else I can do? This is XP system. > Scott *I loaded version 3.2, so not sure why the python25 was in there. ___ Amazon: Check out my over 800 items for sale on Amazon at: http://www.amazon.com/shops/bookman236 "I believe that everything happens for a reason. People change so that you can learn to let go, things go wrong so that you appreciate them when they're right, you believe lies so you eventually learn to trust no one but yourself, and sometimes good things fall apart so better things can fall together." -Marilyn Monroe-- http://mail.python.org/mailman/listinfo/python-list
Re: Adopting ‘lockfile’
On 03/03/2012 21:43, Ben Finney wrote: I don't see a need to horse around with Git either :-) It's currently in Subversion, right? Can you not export the VCS history from Google Code's Subversion repository to a ‘fastimport’ stream? Maybe someone with experience on that site can help us. What's wrong with a "git svn clone svn-url-here" ? Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Is this the right location to launch IDLE?
I'm trying to get Notepad++ to launch IDLE and run the currently open file in IDLE, but all my attempts have failed so far. I'm wondering, am I even using the IDLE path correctly? I'm using this: "C:\Python32\Lib\idlelib\idle.pyw" "$(FULL_CURRENT_PATH)" (That last part puts in the full path to the open file.) Is this not the proper way to launch IDLE with an argument? It actually does open up IDLE, but the file doesn't seem to have been loaded, because when I try to use variables or functions from the file, IDLE acts as if it doesn't know what I'm referring to. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Parse cisco's "show ip route" output in Python 2.7
Hi All, Long time reader, first time poster. I'm trying to parse the output of the SHOW IP ROUTE command from a cisco router (It's a 3800 Series IOS 12.4 although almost all should have same output format) and put it into a CSV format to import into a database or spreadsheet. While we of course have Static / Connected routes, we also have lots of dynamic routing coming in via OSPF, BGP, RIP, etc... The output of the command is easy enough for me to get into text files via parimiko (on that, does this module or equivalent work on Python 3 yet?) .. it's just tough to present the data into a csv or tabbed format. To me, although I've done similar things in the past, it's a fairly brutal output format to parse up. I was about to post some sample input, but I am even having a hard time sanitizing the IP's for use on this forum (Any utility for that?) as it's filled with IP addresses that I cannot share. I'd love some python module if anyone has an idea where I can get it? Perl does seem to have something similar : http://cpansearch.perl.org/src/MARKPF/Cisco-ShowIPRoute-Parser-1.02/Parser.pm however, I'd like to keep it in python... Mainly, did someone already do this so I don't have to reinvent this wheel (which probably won't roll straight)? Thanks in advance, and hopefully I've given enough information.. I've been trying to parse it for about 9 hours... but the script get's worse and worse as I keep finding flaws in my logic. -- http://mail.python.org/mailman/listinfo/python-list
Re: Parse cisco's "show ip route" output in Python 2.7
I've done little with Ciscos, but what if you use individual things like "show ip ospf", "show ip rip database", etc. instead of "show ip route". Does that makes things a little more consistent? Often big problems are simpler if we can divide them into smaller, more manageable subproblems. On Sun, Mar 4, 2012 at 4:20 PM, Antgoodlife wrote: > Hi All, > > Long time reader, first time poster. I'm trying to parse the output > of the SHOW IP ROUTE command from a cisco router (It's a 3800 Series > IOS 12.4 although almost all should have same output format) and put > it into a CSV format to import into a database or spreadsheet. > While we of course have Static / Connected routes, we also have lots > of dynamic routing coming in via OSPF, BGP, RIP, etc... > > The output of the command is easy enough for me to get into text files > via parimiko (on that, does this module or equivalent work on Python 3 > yet?) .. it's just tough to present the data into a csv or tabbed > format. > > To me, although I've done similar things in the past, it's a fairly > brutal output format to parse up. I was about to post some sample > input, but I am even having a hard time sanitizing the IP's for use on > this forum (Any utility for that?) as it's filled with IP addresses > that I cannot share. I'd love some python module if anyone has an > idea where I can get it? > > Perl does seem to have something similar : > > http://cpansearch.perl.org/src/MARKPF/Cisco-ShowIPRoute-Parser-1.02/Parser.pm > however, I'd like to keep it in python... > > Mainly, did someone already do this so I don't have to reinvent this > wheel (which probably won't roll straight)? > > Thanks in advance, and hopefully I've given enough information.. I've > been trying to parse it for about 9 hours... but the script get's > worse and worse as I keep finding flaws in my logic. > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: How do you use the widgets in tkinter.ttk if you want to "import tkinter as tk"?
On Mar 2, 11:06 pm, John Salerno wrote: > I'm tempted just to go back to wxPython. Two sets of widgets in Tkinter is a > little annoying. Your complaint is justified. The Tkinter API is a disgrace. IDLE's source is just as bad. Luckily i have not made the jump to py3000 full- time yet, but when i do, i think the first item on my to-do list will be to hack this hideous tk+ttk+blah+blah into something more friendly. Heck, maybe i'll even release it! -- http://mail.python.org/mailman/listinfo/python-list
[FIXED] Re: Can't get tilde character with IDLE 3.2.2 on French Mac Lion
A followup to a thread in 2011-12. In article , Ned Deily wrote: > In article , > Franck Ditter wrote: > > In article , > > Ned Deily wrote: > > > In article , > > > Franck Ditter wrote: > > > > All is in the subject. I'm starting to use Python with Idle 3.2.2 > > > > on MacOS-X Lion (French). I can't get "Option-N space" to provide > > > > the ~ char. > > > > I tried to go into the Keys preferences but I can't find "Option-N > > > > space" > > > > to modify its meaning. Its actual behavior is to merge lines of a > > > > paragraph. > > > You are likely running into a current problem in the OS X Cocoa version > > > of Tcl/Tk 8.5 as included with Lion and as shipped by ActiveState. > > > Previously, if you tried to type composite characters, like Option N, > > > the Cocoa Tcl/Tk would crash. Pending a real fix, a patch was made to > > > Tcl/Tk 8.5 to discard composite characters rather than crash. You > > > should be able to get a tilde by using the post-composite keyboard > > > sequence: try typing "space" followed by "Shift-Option-N". > > > > > > http://sourceforge.net/tracker/index.php?func=detail&aid=2907388&group_id= > > > 12 > > > 997&atid=112997 > > Nope, "space" followed by "Shift-Option-N" gives a greek iota... > > I tried other combinations, unsuccessfully. > > IDLE 3 (French) seems to be unusable as we use many ~ in web applications > > :-( > > Should we hope a fix soon, or leave IDLE ? > > Yes, I see now that that won't work with the French input method. > Unfortunately, there is nothing that IDLE or Python can do to workaround > the issue as the problem is in Cocoa Tcl/Tk and I don't know that any > fix is being worked on. Good news! A fix for Cocoa Tcl/Tk 8.5 for improved handling of Mac OS X input methods was recently applied and has now been released in the latest ActiveState Tcl release (8.5.11.1) available here: http://www.activestate.com/activetcl/downloads It appears to fix the tilde problem and other similar problems with composite characters, like Option-U + vowel to form "umlauted" vowels in the U.S. input method. Many thanks to Adrian Robert, Kevin Walzer, and the ActiveState team for addressing this nasty problem. If you install ActiveState Tcl 8.5.x, it will automatically be used by the python.org 2.7.x, 3.2.x, and 3.3.x 64-bit/32-bit Pythons for OS X 10.6 and 10.7. It will *not* be used by the Apple-supplied system Pythons or by 32-bit-only python.org Pythons. More details here: http://www.python.org/download/mac/tcltk/ -- Ned Deily, n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Buffering in Wing and IDLE 3
In article , Kevin Walzer wrote: > On 2/1/12 3:01 PM, Terry Reedy wrote: > > On 2/1/2012 10:17 AM, Franck Ditter wrote: > > > >> I would prefer to use IDLE but as we are in France, the Python team > >> does not seem to be aware that the ~ and others are not available > >> on MacOS-X here (probably the same in Europe)... > > > > We are quite aware of the problem but cannot directly do anything about > > it as the problem is with tcl/tk and Apple. A couple of days ago, Kevin > > Walzer wrote on an IDLE-sig post "I'm currently reviewing an updated > > patch to address the problem. When I commit the patch, it will go into > > both Tk's trunk and in the Cocoa 8.5 backport, and eventually be > > available through ActiveState's distribution." > > > And it's been committed: > > http://core.tcl.tk/tk/info/9844fe10b9 ... and released in ActiveState 8.5.11.1 http://www.activestate.com/activetcl/downloads -- Ned Deily, n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: How do you use the widgets in tkinter.ttk if you want to "import tkinter as tk"?
On 3/3/12 12:06 AM, John Salerno wrote: I suppose the 'advantage' of this is that it will replace tk widgets with equivalent ttk widgets, if they exist and have the same name. I believe one has to program them differently, however, so the replacement cannot be transparent and one mush know anyway what gets replaced and what not. Grr, sounds like a pain if I want to use the new widgets. Does this cause conflict with someone who isn't running 8.5, or will they still see the older widgets as normal? I'm tempted just to go back to wxPython. Two sets of widgets in Tkinter is a little annoying. The new widgets are not a drop-in replacement for the traditional Tk widgets. They can be used with 8.4 if the "tile" Tk extension is installed. This is how the ttk widgets were first deployed; they didn't enter Tk's core until 8.5. -- Kevin Walzer Code by Kevin http://www.codebykevin.com -- http://mail.python.org/mailman/listinfo/python-list
Re: How do you use the widgets in tkinter.ttk if you want to "import tkinter as tk"?
On Sun, Mar 04, 2012 at 05:39:27PM -0800, Rick Johnson wrote: > On Mar 2, 11:06 pm, John Salerno wrote: > > I'm tempted just to go back to wxPython. Two sets of widgets in Tkinter is > > a little annoying. > > Your complaint is justified. The Tkinter API is a disgrace. IDLE's > source is just as bad. Luckily i have not made the jump to py3000 full- > time yet, but when i do, i think the first item on my to-do list will > be to hack this hideous tk+ttk+blah+blah into something more > friendly. > > Heck, maybe i'll even release it! Make sure not to write it from scratch! -- http://mail.python.org/mailman/listinfo/python-list
Re: Porting Python to an embedded system
On Sunday, March 4, 2012 6:58:50 PM UTC+8, Justin Drake wrote: > I am working with an ARM Cortex M3 on which I need to port Python > (without operating system). What would be my best approach? I just > need the core Python and basic I/O. Sounds like the JVM law suites in ANDROINDS did stimulate a lot jobs to use other VM-BYTECODE based programming languages. I suggest that one can use tiny linux or MU-linux which is even smaller than Linux and then install a slimmer customized python not the same as the fatter one used in PC. -- http://mail.python.org/mailman/listinfo/python-list
Re: Porting Python to an embedded system
You might check out pymite. http://wiki.python.org/moin/PyMite Oh, but I'm now realizing that's part of the python on a chip project, so in a way it's already been mentioned. Anyway, PyMite, I gather, is a tiny python for microcontrollers. On Sun, Mar 4, 2012 at 2:58 AM, Justin Drake wrote: > I am working with an ARM Cortex M3 on which I need to port Python > (without operating system). What would be my best approach? I just > need the core Python and basic I/O. > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this the right location to launch IDLE?
On Sun, Mar 4, 2012 at 3:07 PM, John Salerno wrote: > I'm trying to get Notepad++ to launch IDLE and run the currently open file in > IDLE, but all my attempts have failed so far. I'm wondering, am I even using > the IDLE path correctly? I'm using this: > > "C:\Python32\Lib\idlelib\idle.pyw" "$(FULL_CURRENT_PATH)" > > (That last part puts in the full path to the open file.) > > Is this not the proper way to launch IDLE with an argument? Correct. According to IDLE's USAGE message, you want the "-r" option, which would make your desired command: "C:\Python32\Lib\idlelib\idle.pyw" -r "$(FULL_CURRENT_PATH)" > It actually does open up IDLE, but the file doesn't seem to have been loaded, > because when I try to use variables or functions from the file, IDLE acts as > if it doesn't know what I'm referring to. Cheers, Chris -- http://rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this the right location to launch IDLE?
Unfortunately neither method worked. Adding "-r" to the path created this error when I tried it: >>> *** Error in script or command! Traceback (most recent call last): File "C:\Users\John\Documents\Python Scripts\chess_pieces.py", line 1 class ChessPiece: ^ SyntaxError: invalid character in identifier >>> Although there really is no error in the file, and running it directly from within IDLE doesn't cause this problem. Adding the "pythonw.exe" part to the beginning also gave this error, but when I remove the "-r", then it just opens IDLE as normal, but without having loaded the Notepad++ file. I just know there has to be a way to do this, but perhaps it's more of an NP++ problem. I posted on their forums but no one responded. I thought I might see if the problem lies with calling IDLE, but apparently it's a Windows/NP++ thing... -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this the right location to launch IDLE?
On Sun, Mar 4, 2012 at 7:51 PM, John Salerno wrote: > Unfortunately neither method worked. Adding "-r" to the path created this > error when I tried it: > > *** Error in script or command! > > Traceback (most recent call last): > File "C:\Users\John\Documents\Python Scripts\chess_pieces.py", line 1 > class ChessPiece: That would be a Notepad++ problem. That "" gibberish is what you get when a Unicode BOM (Byte Order Mark) character is encoded as UTF-8 but decoded as ISO-8859-1 or CP-1252. A BOM is not recommended for UTF-8 text; there should be some setting in Notepad++ to suppress it. Cheers, Chris -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this the right location to launch IDLE?
> That would be a Notepad++ problem. That "" gibberish is what you > get when a Unicode BOM (Byte Order Mark) character is encoded as UTF-8 > but decoded as ISO-8859-1 or CP-1252. A BOM is not recommended for > UTF-8 text; there should be some setting in Notepad++ to suppress it. You are my new hero! :) It works perfectly now! I set the default for files to be UTF-8 without BOM, and I also checked the option that said "Apply to opened ANSI files." Is that okay? Thank you!!! -- http://mail.python.org/mailman/listinfo/python-list
Re: How do you use the widgets in tkinter.ttk if you want to "import tkinter as tk"?
On Sunday, March 4, 2012 7:39:27 PM UTC-6, Rick Johnson wrote: > On Mar 2, 11:06 pm, John Salerno wrote: > > I'm tempted just to go back to wxPython. Two sets of widgets in Tkinter is > > a little annoying. > > Your complaint is justified. The Tkinter API is a disgrace. IDLE's > source is just as bad. Luckily i have not made the jump to py3000 full- > time yet, but when i do, i think the first item on my to-do list will > be to hack this hideous tk+ttk+blah+blah into something more > friendly. > > Heck, maybe i'll even release it! Well, after reading about the themed widgets and using them a bit, they definitely seem a lot cleaner than the old ones. Just comparing the attributes of the new and old widgets is a big difference. Much more streamlined. -- http://mail.python.org/mailman/listinfo/python-list
Tkinter: Why aren't my widgets expanding when I resize the window?
I can't seem to wrap my head around all the necessary arguments for making a
widget expand when a window is resized. I've been following along with a
tutorial and I feel like I'm doing everything it said, but I must be missing
something. Here's what I have. What I expect is that when I resize the main
window, I should be able to see the AppFrame's border stretch out, but it
remains in the original position.
Is there something wrong with the sticky argument, maybe? The tutorial I'm
reading says they can be strings, but it also uses what appears to be a tuple
of constants like this: sticky=(N, S, E, W) -- but that didn't work either.
import tkinter as tk
import tkinter.ttk as ttk
class AppFrame(ttk.Frame):
def __init__(self, parent, **kwargs):
super().__init__(parent, **kwargs)
self.grid(row=0, column=0, sticky='nsew')
self.columnconfigure(0, weight=1)
self.rowconfigure(0, weight=1)
self.create_widgets()
def create_widgets(self):
entry = ttk.Entry(self)
entry.grid(row=0, column=1, sticky='nsew')
#entry.columnconfigure(0, weight=1)
#entry.rowconfigure(0, weight=1)
label = ttk.Label(self, text='Name:')
label.grid(row=0, column=0, sticky='nsew')
root = tk.Tk()
root.title('Test Application')
frame = AppFrame(root, borderwidth=15, relief='sunken')
root.mainloop()
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[RELEASED] Python 3.3.0 alpha 1
On behalf of the Python development team, I'm happy to announce the
first alpha release of Python 3.3.0.
This is a preview release, and its use is not recommended in
production settings.
Python 3.3 includes a range of improvements of the 3.x series, as well as easier
porting between 2.x and 3.x. Major new features in the 3.3 release series are:
* PEP 380, Syntax for Delegating to a Subgenerator ("yield from")
* PEP 393, Flexible String Representation (doing away with the
distinction between "wide" and "narrow" Unicode builds)
* PEP 409, Suppressing Exception Context
* PEP 3151, Reworking the OS and IO exception hierarchy
* The new "packaging" module, building upon the "distribute" and
"distutils2" projects and deprecating "distutils"
* The new "lzma" module with LZMA/XZ support
* PEP 3155, Qualified name for classes and functions
* PEP 414, explicit Unicode literals to help with porting
* The new "faulthandler" module that helps diagnosing crashes
* Wrappers for many more POSIX functions in the "os" and "signal"
modules, as well as other useful functions such as "sendfile()"
For a more extensive list of changes in 3.3.0, see
http://docs.python.org/3.3/whatsnew/3.3.html
To download Python 3.3.0 visit:
http://www.python.org/download/releases/3.3.0/
Please consider trying Python 3.3.0a1 with your code and reporting any
bugs you may notice to:
http://bugs.python.org/
Enjoy!
--
Georg Brandl, Release Manager
georg at python.org
(on behalf of the entire python-dev team and 3.3's contributors)
--
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