[Pythonmac-SIG] Tkinter/Mac newbie query

[William R. Wing (Bill Wing)]

Mac OSX 10.8.1, 2 x quad processor Intel MacPro, Python 2.7.3 from python.org.

I've been programming in python for a couple of years (off and on), and I'm 
getting more and more comfortable with it.
I'd like to start putting GUIs in front of some of my code, and have been 
looking at wx, Tkinter, and PyQt.

Everything I read says that starting with Tkinter version 8.2 (or something 
like that) it is themed and Tkinter applications should look native on the 
various platforms.  The version of Tkinter I have is 8.5, but when I code up 
some of the Tkinter demos, they all come out looking more like X11 applications 
than like native Mac apps.

I assume the problem is because I'm not doing SOMETHING right in the 
initialization, but I'm scratching my head over what.

Does anyone have any thoughts as to what I might be doing wrong?

I've pasted a typical bit of code in below.

#!/usr/bin/env python
from Tkinter import *
class App:
def __init__(self, master):
frame = Frame(master)
frame.pack()
self.button = Button(frame, text=QUIT, fg=red, command=frame.quit)
self.button.pack(side=LEFT)
self.hi_there = Button(frame, text=Hello, command=self.say_hi)
self.hi_there.pack(side=LEFT)
def say_hi(self):
print hi there, everyone!
root = Tk()
app = App(root)
root.mainloop()

And yes, the version of python I get via !usr/bin/env is the same one I get at 
the terminal prompt.

Thanks,
Bill

 
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[Pythonmac-SIG] Matplotlib-animation problem

[William R. Wing (Bill Wing)]

I'm running Mac OS-X 10.8.1, with python 2.7.3, numpy 1.8.0, matplotlib 1.2, 
and wxPython 2.9.3.1 (although wx isn't involved here, at least I don't think 
so).  I'm running on a dual-quad processor Xeon Mac Pro.

I decided to learn something about animated matplotlib graphics, so started to 
look at the examples in http://matplotlib.sourceforge.net/examples/animation/...

I consistently run into a problem, illustrated below.  Starting from the 
animate_decay.py code, copied and pasted into an editor as here:

#!/usr/bin/env python

 http://matplotlib.sourceforge.net/examples/animation/animate_decay.html


import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation

def data_gen():
 t = data_gen.t
 cnt = 0
 while cnt  1000:
 cnt+=1
 t += 0.05
 yield t, np.sin(2*np.pi*t) * np.exp(-t/10.)
data_gen.t = 0

fig = plt.figure()
ax = fig.add_subplot(111)
line, = ax.plot([], [], lw=2)
ax.set_ylim(-1.1, 1.1)
ax.set_xlim(0, 5)
ax.grid()
xdata, ydata = [], []
def run(data):
 # update the data
 t,y = data
 xdata.append(t)
 ydata.append(y)
 xmin, xmax = ax.get_xlim()

 if t = xmax:
 ax.set_xlim(xmin, 2*xmax)
 ax.figure.canvas.draw()
 line.set_data(xdata, ydata)

 return line,

ani = animation.FuncAnimation(fig, run, data_gen, blit=True, interval=10,
 repeat=False)
plt.show()


If I attempt to run this script (or any of several others), I get:

StraylightPro:Matplotlib_stuff wrw$ ./animate_decay.py
Traceback (most recent call last):
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/backend_bases.py,
 line 1117, in _on_timer
 ret = func(*args, **kwargs)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 763, in _step
 still_going = Animation._step(self, *args)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 625, in _step
 self._draw_next_frame(framedata, self._blit)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 645, in _draw_next_frame
 self._post_draw(framedata, blit)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 668, in _post_draw
 self._blit_draw(self._drawn_artists, self._blit_cache)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 682, in _blit_draw
 bg_cache[a.axes] = a.figure.canvas.copy_from_bbox(a.axes.bbox)
AttributeError: 'FigureCanvasMac' object has no attribute 'copy_from_bbox'
Traceback (most recent call last):
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/backend_bases.py,
 line 1117, in _on_timer
 ret = func(*args, **kwargs)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 763, in _step
 still_going = Animation._step(self, *args)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 625, in _step
 self._draw_next_frame(framedata, self._blit)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 643, in _draw_next_frame
 self._pre_draw(framedata, blit)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 656, in _pre_draw
 self._blit_clear(self._drawn_artists, self._blit_cache)
File 
/Library/Python/2.7/site-packages/matplotlib-1.2.x-py2.7-macosx-10.8-intel.egg/matplotlib/animation.py,
 line 696, in _blit_clear
 a.figure.canvas.restore_region(bg_cache[a])
AttributeError: 'FigureCanvasMac' object has no attribute 'restore_region'


…and the 'restore-region' error sequence then repeats endlessly.

I'm hoping this is all caused by my not quite having the right library 
installed someplace along the line.  If anyone could point it out, I'd sure 
appreciate it.

Thanks,
Bill
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[Pythonmac-SIG] Problem launching a py2app bundle from launchd on Mountain Lion

[William R. Wing (Bill Wing)]

With apologies for cross-posting (I also asked about this on stackoverflow), 
but I'm getting REALLY frustrated.

I have a python script called Irrigate that I've converted to a stand-alone 
application using py2app.  It runs just fine when double-clicked in the Finder, 
or opened in a terminal session.  However, when I try to have it launched by 
launched, it fails with the following message logged in the system log:

Aug  8 07:15:02 StraylightPro.local Irrigate[79689]: Irrigate Error
Aug  8 07:15:02 StraylightPro.local coreservicesd[77]: Application 
App:Irrigate [ 0x0/0x697596f]  @ 0x0x7fe77240cec0 tried to be brought 
forward, but isn't in fPermittedFrontASNs ( ( ASN:0x0-0x1cb2cb1:) ), so denying.

I discovered by trial and error that the .plist I submit to launchd apparently 
now has to contain a SessionType key, and the only key I can get launchd to 
accept is Aqua - which sort of seems consistent with the error message 
reference tried to be brought forward.  If I use SessionType keys of either 
StandardIO or Background, launchd won't accept the plist.

Googling for fPermittedFrontASNs (or pieces of this string), and searching 
Apple's developer docs hasn't produced anything.

I assume this is all tied to Apple's new security features in Mountain Lion and 
further that, if I just knew what extended attributes to add to the app.bundle 
or a key to add to the info.plist inside it, I'd be good to go.  Does anyone 
here know the answer?

Thanks,
Bill

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Re: [Pythonmac-SIG] question

[William R. Wing (Bill Wing)]

On Jul 9, 2012, at 7:46 PM, Ed Pataky wrote:

 i have a mac where i installed python, and tornado web server .. i used 
 py2app and created an executable which wraps my tornado kickoff script into 
 an executable .. works ok sometimes, but i am confused about a couple things: 
 
 1) when i run the app, since it is essentially a command line script with no 
 GUI, i see nothing, although i is running ... how can i create the  app so 
 that it opens the terminal and shows the output?
 

Strictly speaking you can't without a lot of extra trouble - BUT any print 
statements in your script will be logged to the system log and is then easily 
viewable in the Console app in your Utilities folder.

 2) sometimes it gets blocked by the firewall and sometimes it does not .. i 
 have manually gone in and added it to he allowed list in the firewall, then 
 as soon as it tries to open a port, the firewall blocks it ... i am not sure 
 how i did it but i got it work a few times, then sometimes it is blocked .. 
 how can i make sure when i run the app, it has full permission without having 
 to mess with the firewall setting ... for example, is there an admin option 
 when making the executable?

Could you be a little more specific here - are you opening a port to listen for 
incoming sessions or are you trying to open an outbound session?  Also, exactly 
which version of the OS are you running?  Apple has been locking things down 
more and more in the progression from 10.6 to 10.7.

-Bill


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Re: [Pythonmac-SIG] Problems with /Library/ScriptingAdditions/Adobe Unit Types.osax

[William R. Wing (Bill Wing)]

On Jun 6, 2012, at 9:56 AM, Kevin Walzer wrote:

 On 6/5/12 10:36 PM, William R. Wing (Bill Wing) wrote:
 But, to be sure I understand…  Is the reason I hadn't run into this problem 
 earlier simply because Tk and wx need to check in with Apple Events so they 
 can get things like mouse clicks, whereas more basic Python scripts don't?
 
 If you post a copy of your code, it would be easier to figure out what's 
 going on.
 
 -- 
 Kevin Walzer
 Code by Kevin
 http://www.codebykevin.com

Probably not worth the bandwidth at this point, but here it is:

#!/usr/bin/env python

from Tkinter import *

class Application(Frame):
def say_hi(self):
print hi there, everyone!

def createWidgets(self):
self.QUIT = Button(self)
self.QUIT[text] = QUIT
self.QUIT[fg]   = red
self.QUIT[command] =  self.quit

self.QUIT.pack({side: left})

self.hi_there = Button(self)
self.hi_there[text] = Hello,
self.hi_there[command] = self.say_hi

self.hi_there.pack({side: left})

def __init__(self, master=None):
Frame.__init__(self, master)
self.pack()
self.createWidgets()

root = Tk()
app = Application(master=root)
app.mainloop()
root.destroy()



That code was copied straight out of the Tk documentation at:
  http://docs.python.org/library/tk.html
and it triggered the error caused by the 32-bit Adobe file in 
/ScriptingAdditions/ that I'd never seen before.

It turns out that Adobe has posted a 64-bit version of the file, although it 
takes a fair amount of work in a terminal session to get it, set its 
permissions, ownership, and ACL all properly.
But, it still leaves me wondering - why do wxPython and Tkinter need to look at 
stuff in the ScriptingAdditions area of the OS at all?

Thanks for your patience,
Bill
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[Pythonmac-SIG] Problems with /Library/ScriptingAdditions/Adobe Unit Types.osax

[William R. Wing (Bill Wing)]

Hope someone here can help with a work-around.

Context:  OS-X 10.7.4 (Lion), Python 2.7.3 (downloaded from Python.org and 
installed in /Library/Frameworks... (not /System/Library), and seems to work 
just file.

However, when I attempt to run any sort of GUI code (either a Tk demo from the 
Python docs page or a wxPython demo), I get the following error msg:

StraylightPro:Python wrw$ python tk_test.py
2012-06-05 20:28:35.442 Python[51697:f07] Error loading 
/Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit 
Types:  dlopen(/Library/ScriptingAdditions/Adobe Unit 
Types.osax/Contents/MacOS/Adobe Unit Types, 262): no suitable image found.  Did 
find:
/Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe 
Unit Types: no matching architecture in universal wrapper
Python: OpenScripting.framework - scripting addition 
/Library/ScriptingAdditions/Adobe Unit Types.osax declares no loadable 
handlers.

When I first hit this, I was running wxPython2.8 which is based on the Carbon 
widgets and thus has to run in 32-bit mode.  I assumed I was seeing an 
architecture collision, so downloaded wxPython2.9 Cocoa, which should be 64-bit 
compatible.  Same error.  After scratching my head and checking with Google 
(which knows about this error in conjunction with Adobe CS products but knows 
nothing about Python), I decided to try a Tk demo, assuming that since the Tk 
library is bundled with Python, it would be good to go.  I got the same 
identical error again, and in fact (as you can see) the fragment of the 
terminal session pasted in above was from the Tk test.

Color me frustrated.  Any help appreciated.

Thanks,
-Bill
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Re: [Pythonmac-SIG] Problems with /Library/ScriptingAdditions/Adobe Unit Types.osax

[William R. Wing (Bill Wing)]

On Jun 5, 2012, at 9:57 PM, Kevin Walzer wrote:

 On 6/5/12 8:43 PM, William R. Wing (Bill Wing) wrote:
 /Library/ScriptingAdditions/Adobe Unit Types.osax
 
 This osax is conflicting not with Python or Tk, but with the Apple Events 
 framework. It's probably PPC or 32-bit only. An updater is available from 
 Adobe. (I've run into this issue with my own apps, which crash when someone 
 has an outdated osax installed--there's no workaround other than to ask the 
 end user to remove or update the library.)
 -- 
 Kevin Walzer
 Code by Kevin
 http://www.codebykevin.com

Thanks, when your note showed up, I had just finished hiding the Adobe .osax 
file (I finally did find a clue on Google) and discovered that the error msg 
had gone away.

But, to be sure I understand…  Is the reason I hadn't run into this problem 
earlier simply because Tk and wx need to check in with Apple Events so they can 
get things like mouse clicks, whereas more basic Python scripts don't?

That's terrible syntax, but maybe you can see what I'm asking.  I've been 
writing Python scripts for a year or so, and this is the first I've seen of 
this problem.

Thanks,
Bill

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