[Tutor] tkinter message button questions
Peter Otten __pete...@web.de wrote: To: tutor@python.org Subject: Re: [Tutor] tkinter message button questions Message-ID: jb38s2$9gg$1...@dough.gmane.org Content-Type: text/plain; charset=ISO-8859-1 I've no experience with the place layout manager, but the following seems to be what you want: root = Tk() win = Frame(root) win.place(relheight=1, relwidth=1) label_widget = Label(win, text=Welcome to Quote of the Day) label_widget.pack(side=TOP, expand=YES, fill=BOTH) msg_widget = Message( win, anchor=NW, justify=LEFT, width=1000, bd=2, bg=white, relief=SOLID, text=choose_quote()) msg_widget.pack(fill=BOTH) next_button = Button(win, text=Next Quote, command=display_quote) next_button.pack(side=LEFT) quit_button = Button(win, text=QUIT, fg=red, command=quit) quit_button.pack(side=RIGHT) root.geometry(400x100) root.mainloop() Peter thanks again. The msg_widget is still resizing vertically depending on the lenght of the quote, but at least now the horizontal sizing is staying the same. Ideally the msg_widget would be the *same size*, no matter what the quote length is, but since this program is really just a learning exercise and to show database adminstrators a simple Python GUI application I can live with it. The syntax you used, like root.geometry(400x100), I have not seen before, and I've done a lot of searching. Again, much of the tkinter stuff I see seems to be based on Python 2.6. If there is a definitive book or reference on using tkinter in Python 3.x I'd really like to know about it. Thanks again Peter, Wayne, and everyone else on the tutor list, you guys are great. -- Frank L. Cranky Frankie Palmeri ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] tkinter message button questions
On Wed, Nov 30, 2011 at 8:32 AM, Cranky Frankie cranky.fran...@gmail.comwrote: Peter Otten __pete...@web.de wrote: snipPeter thanks again. The msg_widget is still resizing vertically depending on the lenght of the quote, but at least now the horizontal sizing is staying the same. Ideally the msg_widget would be the *same size*, no matter what the quote length is, but since this program is really just a learning exercise and to show database adminstrators a simple Python GUI application I can live with it. The whole purpose of the Message widget is that it *does* resize. If you wanted something to be a static size, I think a Label would fit the bill - though I haven't played around enough with that in recent time. The syntax you used, like root.geometry(400x100), I have not seen before, and I've done a lot of searching. Again, much of the tkinter stuff I see seems to be based on Python 2.6. If there is a definitive book or reference on using tkinter in Python 3.x I'd really like to know about it. That's the great thing about Python - most of the syntax is identical, and there should be only minor differences between Python 2.x and 3.x - especially where Tkinter is concerned. I would go ahead and look at 2.x tutorials/articles for Tkinter and just be aware that you'll encounter some issues (probably mostly dealing with Unicode strings, and occasionally something numeric - based on my experience). With that preparation then you should be able to easily search for answers to the problems you encounter. HTH, Wayne ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] tkinter message button questions
Cranky Frankie wrote: Peter thanks again. The msg_widget is still resizing vertically depending on the lenght of the quote, but at least now the horizontal sizing is staying the same. Ideally the msg_widget would be the *same size*, no matter what the quote length is, but since this program is really just a learning exercise and to show database adminstrators a simple Python GUI application I can live with it. Well, you can place() everything yourself: root = Tk() win = Frame(root) win.place(relheight=1, relwidth=1) label_widget = Label(win, text=Welcome to Quote of the Day) label_widget.place(width=300, height=20) msg_widget = Message( win, anchor=NW, justify=LEFT, width=1000, bd=2, bg=white, relief=SOLID, text=choose_quote()) msg_widget.place(width=300, height=50, y=20) next_button = Button(win, text=Next Quote, command=display_quote) next_button.place(y=70) quit_button = Button(win, text=QUIT, fg=red, command=quit) quit_button.place(y=70, x=200) root.geometry(400x100) root.mainloop() The disadvantage of that approach is of course that you have to place everything yourself ;) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] pass tuples to user defined function(beginner)
On 11/29/2011 4:44 PM Dave Angel said... Any chance you were a customer or vendor of Wang? That 80mb drive, dumbed down, for prices around $20k, rings a bell. That was around 1980 as an ISV -- a Basic Four 610 -- we paid I think $50k? retailed at $70k. 8 user, 256k memory, two 35Mb drives that for $15k a piece you could get the tech to come out and clip the strap on the high order bit of the address space register which would double the usable space. Kinda like getting a discount on a caddy but they deliver the car with the back doors welded shut. Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] tkinter message button questions
On 30/11/11 14:32, Cranky Frankie wrote: The syntax you used, like root.geometry(400x100), I have not seen before, and I've done a lot of searching. Again, much of the tkinter stuff I see seems to be based on Python 2.6. If there is a definitive book or reference on using tkinter in Python 3.x I'd really like to know about it. For those times when help() fails to provide enough detail... The definitive reference for Tkinter is usually the Tk documentation. But that is expressed in terms of Tcl rather than Python - although they are trying to address that. But it does require some translation. I usually look here first: http://docs.python.org/py3k/library/tk.html and http://www.pythonware.com/library/tkinter/introduction/index.htm For the Tk docs try: http://www.tcl.tk/man/tcl8.5/TkLib/contents.htm And finally this shows promise but is still under construction : http://www.tkdocs.com/index.html It tries to cover other languages, including Python but its a bit patchy so far... -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] plotting in python
Hi there,
I have a question regarding plotting with Python.
I have the following python script:
# coding: utf-8
from pylab import *
import numpy
filename='ourtest_out.list'
fh=open(filename)
line=fh.readline()
fh.close
z=array([ float(val) for val in line.split()[1:] ])
a = numpy.loadtxt(filename,skiprows=3)
N=100
t = a[:,0]
nu = a[0:,1:N+1]
#Conc = a[1:,N+1:]
Conc = a[1:,N+1:]
levels=arange(-10,1)
levels=levels[-3]-levels
t=t/360.
figure()
plot(Conc[0],z)
xlabel('C')
ylabel('z')
#show()
savefig('Conc.png')
close()
#nu
figure()
lw = 2.0 #linewidth
dpi = 96
levels=arange(-10,1)
levels=levels[-3]-levels
plot(nu[0],z)
xlabel('nu')
ylabel('z')
savefig('nu.png')
close()
However, once I run the program (run.py)
I have error like this:
---
ValueErrorTraceback (most recent call last)
/Users/…./run.py in module()
24
25 figure()
--- 26 plot(Conc[0],z)
27
28 xlabel('C')
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/pyplot.py
in plot(*args, **kwargs)
2284 ax.hold(hold)
2285 try:
- 2286 ret = ax.plot(*args, **kwargs)
2287 draw_if_interactive()
2288 finally:
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in plot(self, *args, **kwargs)
3781 lines = []
3782
- 3783 for line in self._get_lines(*args, **kwargs):
3784 self.add_line(line)
3785 lines.append(line)
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in _grab_next_args(self, *args, **kwargs)
315 return
316 if len(remaining) = 3:
-- 317 for seg in self._plot_args(remaining, kwargs):
318 yield seg
319 return
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in _plot_args(self, tup, kwargs)
292 x = np.arange(y.shape[0], dtype=float)
293
-- 294 x, y = self._xy_from_xy(x, y)
295
296 if self.command == 'plot':
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in _xy_from_xy(self, x, y)
232 y = np.atleast_1d(y)
233 if x.shape[0] != y.shape[0]:
-- 234 raise ValueError(x and y must have same first dimension)
235 if x.ndim 2 or y.ndim 2:
236 raise ValueError(x and y can be no greater than 2-D)
ValueError: x and y must have same first dimension
---So, What would you suggest?
Thanks in advance,
Sue
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Re: [Tutor] Do loop in Python
Yes. Actually, I have changed it to this kine od script: # == model loop == #Optione1 if True: z=zeros( (numlayers,) ) thickness= (thickness*1.0) for l in layers: z = arange ((-thickness - h * l),0,dz) ##z= t -h * l nu = num+ (0.001*exp(-0.005*(z+200.))*dz) #Option2 if False: thickness = range(-200 , 0, 10) # a list from -200 to 0 with step 10 (0, 10, 20, ..., 190, 200) layers = range(1,11) # a list from 1 to 10 for t in thickness: for l in layers: z = arange(( t + h * l ), 0, dz ) #zvalues = arange(-200.,0,dz) nu = num+ (0.001*exp(-0.005*(z+200.))) plot(nu,z) Then it seems it works. it should have a trend to reducing values... - Show quoted text - On Tue, Nov 29, 2011 at 2:00 PM, Steven D'Aprano st...@pearwood.info wrote: stm atoc wrote: Thank you so much for your reply. It was very helpful information and I used it in order to improve the program Here is the new version of the program: zvalues = [-200] # starting value hvalues = [10] # starting value increments = [1, 1, 1, 1, 1, 1, 1, 1] for N in increments: h = hvalues[-1] - N hvalues.append(h) z = zvalues[-1] + h zvalues.append(z) height = arange((z)*dz,0,dz) for z,when in enumerate(height): nuh.append(0.001 * exp(-0.005*(z+200.0))*dz) #turbulence diffusivity m**2/s nu.append(num + nuh[z]) I'm afraid I still don't know what the arange function is. Is that a function you have written yourself? However, I can see that it doesn't actually get used! You create an arange object, and call it height. height = arange((z)*dz,0,dz) You should insert a print statement after this line to see what value height is given, and check that it is what you expect it to be. Presumably height is some sort of list or sequence of values, because you next use it in a for-loop: for z,when in enumerate(height): ... So now we know that z takes on the values 0, 1, 2, 3, ... and when takes on the values from height, whatever they are. But in the rest of your code, you don't use when at all: nuh.append(0.001 * exp(-0.005*(z+200.0))*dz) nu.append(num + nuh[z]) No when, hence the values from height aren't actually used. Strange. Also, what are dz and num? You use them both, but I can't see where they are defined or what value they have. Likewise nuh and nu, although I can guess they are probably lists because you append to them. Because I don't know what values to use, and I don't know what arange is, I can't run your code to see what it does. So I'm reduced to guessing. If I take a wild stab in the dark that dz is a small number, say, 0.01, I can see what values nuh gets: py from math import exp py dz = 0.01 py nuh = [] py for z in range(10): ... nuh.append(0.001 * exp(-0.005*(z+200.0))*dz) ... py from pprint import pprint py pprint(nuh) [3.6787944117144236e-06, 3.6604463480401533e-06, 3.6421897957152333e-06, 3.624024298324903e-06, 3.6059494017307832e-06, 3.587964654059516e-06, 3.5700696056914737e-06, 3.5522638092495153e-06, 3.5345468195878014e-06, 3.5169181937806692e-06] Is that the sort of behaviour you expect for nuh? Since the nuh values are changing, num+nuh[z] should also be changing, which implies nu should be changing. Unless num is so large that rounding error wipes out the nuh values. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] is there a better way to organise this code
hello, is there a better way to organise this code or optimise it. http://pastie.org/2944797 thanks norman ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] plotting in python
On Wed, Nov 30, 2011 at 3:08 PM, stm atoc stm.at...@googlemail.com wrote: Hi there, I have a question regarding plotting with Python. snip ValueError: x and y must have same first dimension It looks like something is wrong with the data that you're trying to plot. Specifically, the data that you're trying to plot has the wrong dimensions (like it says). An example: # 2d space: x = [(1, 1), (2, 2), (3,3)] y = [(1,1,1), (2,2,2), (3,3,3)] x is a series of points in 2 dimensions, and y is a series in 3. If your data really is supposed to look like that then you'll need to pad or trim the data so you've got the correct dimensions. HTH, Wayne ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] plotting in python
On 11/30/2011 1:08 PM stm atoc said...
Hi there,
I have a question regarding plotting with Python.
I have the following python script:
# coding: utf-8
from pylab import *
import numpy
filename='ourtest_out.list'
fh=open(filename)
line=fh.readline()
fh.close
z=array([ float(val) for val in line.split()[1:] ])
a = numpy.loadtxt(filename,skiprows=3)
N=100
t = a[:,0]
nu = a[0:,1:N+1]
#Conc = a[1:,N+1:]
Conc = a[1:,N+1:]
levels=arange(-10,1)
levels=levels[-3]-levels
t=t/360.
figure()
plot(Conc[0],z)
xlabel('C')
ylabel('z')
#show()
savefig('Conc.png')
close()
#nu
figure()
lw = 2.0 #linewidth
dpi = 96
levels=arange(-10,1)
levels=levels[-3]-levels
plot(nu[0],z)
xlabel('nu')
ylabel('z')
savefig('nu.png')
close()
However, once I run the program (run.py)
I have error like this:
---
ValueErrorTraceback (most recent call last)
/Users/…./run.py inmodule()
24
25 figure()
--- 26 plot(Conc[0],z)
27
28 xlabel('C')
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/pyplot.py
in plot(*args, **kwargs)
2284 ax.hold(hold)
2285 try:
- 2286 ret = ax.plot(*args, **kwargs)
2287 draw_if_interactive()
2288 finally:
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in plot(self, *args, **kwargs)
3781 lines = []
3782
- 3783 for line in self._get_lines(*args, **kwargs):
3784 self.add_line(line)
3785 lines.append(line)
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in _grab_next_args(self, *args, **kwargs)
315 return
316 if len(remaining)= 3:
-- 317 for seg in self._plot_args(remaining, kwargs):
318 yield seg
319 return
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in _plot_args(self, tup, kwargs)
292 x = np.arange(y.shape[0], dtype=float)
293
-- 294 x, y = self._xy_from_xy(x, y)
295
296 if self.command == 'plot':
/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py
in _xy_from_xy(self, x, y)
232 y = np.atleast_1d(y)
233 if x.shape[0] != y.shape[0]:
-- 234 raise ValueError(x and y must have same first dimension)
235 if x.ndim 2 or y.ndim 2:
236 raise ValueError(x and y can be no greater than 2-D)
ValueError: x and y must have same first dimension
---So, What would you suggest?
Looking over the traceback and code, it would appear the error is saying
that there is an inconsistency with the arguments expected vs the
arguments passed, which appears in this case to relate to ...
plot(Conc[0],z)
... which derives its parameters from the two lines ...
z=array([ float(val) for val in line.split()[1:] ])
... and ...
a = numpy.loadtxt(filename,skiprows=3)
So, I'd conclude that I'd need a better understanding of how to use the
functions plot, array and numpy.loadtext. Neither plot nor array are
python builtins nor defined within your script, so they're likely
brought in from ...
from pylab import *
... which is generally not something you want to do except when first
starting to experiment and learn a new module, and then I'd keep things
to the interactive interpreter for testing and discovery. This form of
import is generally thought of as polluting the namespace and may allow
library specific names to mask python builtins. For example. suppose a
module 'xyz' contains a special 'print' function. Executing 'from xyz
import *' would shadow the python builtin print function essentially
making it inaccessible. It's possible (although unlikely in the case of
pylab specifically) that any python builtins that are used in your
script have been replaced with pylab versions. A better technique is to
simply import pylab and refer to its functions as pylab.xyz so that no
ambiguity is possible.
So, read up on pylab, find their support list [1], and follow up there.
We focus mainly on getting you far enough along with python basics and
generally leave specific library support to the library authors and
support groups.
HTH
Emile
[1] start at http://www.scipy.org/Mailing_Lists
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Re: [Tutor] is there a better way to organise this code
On Wed, Nov 30, 2011 at 3:34 PM, Norman Khine nor...@khine.net wrote: hello, is there a better way to organise this code or optimise it. http://pastie.org/2944797 After glancing at it the only change that I would recommend (possibly) making is lines 58 and 39 - you can wrap the dictionaries (line line 7) and that will bring all your lines 80 characters. Other than that it looks perfectly readable. You could add some docstrings for completeness. As far as anything else - is this code too slow? If not, why bother trying to optimise it? Obviously if you were doing something horribly inefficient like a bubble sort (especially considering Python has a built-in sort), then you would want to get rid of that, but I didn't really notice anything. Though now that I took a few more seconds, it does look like you're not using rows, aside from looping over it. If you only care about the values and not the collection as a whole you could (and should) change the list comprehension to a generator expression: [x for x in (1,2,3)] [1, 2, 3] (x for x in (1,2,3)) generator object genexpr at 0x01BFB6C0 If you're not familiar with a generators, I highly recommend this set of slides: http://www.dabeaz.com/generators/Generators.pdf HTH, Wayne ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] is there a better way to organise this code
Norman Khine wrote: hello, is there a better way to organise this code or optimise it. http://pastie.org/2944797 Is that a question? Because I get a syntax error in my brain when I parse it without the question mark. wink Sorry to pick on you, but it astonishes me when people don't bother with basic English syntax, and yet try writing code where syntax is *much* more important. If they can't be bothered with writing correct English, that sends all the wrong signals about the quality of their code. You should write as if you were coding, otherwise people will assume you code like you write. Laziness is one of the cardinal virtues of the programmer, but it has to be the right sort of laziness. Don't reinvent the wheel, use an existing library is good laziness. Leave out required syntax elements and hope someone else will fix them is not. Before worrying about optimising the code, how about checking whether it works? (1) What is CSVFile? It appears to be a class, because you inherit from it, but it isn't defined anywhere and isn't a builtin. So your code fails on the very first line. (2) You have a class WorldSchema with no methods, and a top-level function get_world that *looks* like a method because it has an argument self, but isn't. The indentation is wrong. See what I mean about syntax? Syntax is important. So is get_world a wrongly indented method, or a poorly written function? (3) Since get_world doesn't use self at all, perhaps it should be a top-level function of no arguments? Or perhaps a static method of WorldSchema? (4) You have a class called getCountries, which seems to be a poor name for a class. In general, classes should be *things*, not *actions*. Also I recommend that you follow PEP 8 for naming conventions. (Google PEP 8 if you don't know what I mean, and remember, it isn't compulsory, but it is recommended.) A better name might be CountryGetter. (5) The use of classes appears on first reading to be a Java-ism. In Java, everything must be a class Just Because The Powers Who Be Said So. In Python, we are allowed, and encouraged, to mix classes and functions. Use the right tool for the job. But without any idea of the broader context, I have no idea if classes are appropriate or not. (6) getCountries has a method called get_options. Based on the name, a reasonable reader would assume it returns some sort of list or dictionary of options, right? But according to the documentation, it actually returns a JSON ser, whatever that is. Server? Service? Serialization (of what)? Something else? (7) Other problems: Enumerate, MSG and iana_root_zone are used but not defined anywhere. Documentation is lacking, so I don't understand what the code is intended to do. Another class with a poor name, getRegions. There may be others, but I stopped reading around this point. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] is there a better way to organise this code
On 11/30/2011 07:49 PM, Steven D'Aprano wrote: Norman Khine wrote: hello, is there a better way to organise this code or optimise it. http://pastie.org/2944797 Is that a question? Because I get a syntax error in my brain when I parse it without the question mark. wink Sorry to pick on you, but it astonishes me when people don't bother with basic English syntax, and yet try writing code where syntax is *much* more important. If they can't be bothered with writing correct English, that sends all the wrong signals about the quality of their code. You should write as if you were coding, otherwise people will assume you code like you write. Laziness is one of the cardinal virtues of the programmer, but it has to be the right sort of laziness. Don't reinvent the wheel, use an existing library is good laziness. Leave out required syntax elements and hope someone else will fix them is not. Before worrying about optimising the code, how about checking whether it works? (1) What is CSVFile? It appears to be a class, because you inherit from it, but it isn't defined anywhere and isn't a builtin. So your code fails on the very first line. (2) You have a class WorldSchema with no methods, and a top-level function get_world that *looks* like a method because it has an argument self, but isn't. The indentation is wrong. See what I mean about syntax? Syntax is important. So is get_world a wrongly indented method, or a poorly written function? (3) Since get_world doesn't use self at all, perhaps it should be a top-level function of no arguments? Or perhaps a static method of WorldSchema? (4) You have a class called getCountries, which seems to be a poor name for a class. In general, classes should be *things*, not *actions*. Also I recommend that you follow PEP 8 for naming conventions. (Google PEP 8 if you don't know what I mean, and remember, it isn't compulsory, but it is recommended.) A better name might be CountryGetter. (5) The use of classes appears on first reading to be a Java-ism. In Java, everything must be a class Just Because The Powers Who Be Said So. In Python, we are allowed, and encouraged, to mix classes and functions. Use the right tool for the job. But without any idea of the broader context, I have no idea if classes are appropriate or not. (6) getCountries has a method called get_options. Based on the name, a reasonable reader would assume it returns some sort of list or dictionary of options, right? But according to the documentation, it actually returns a JSON ser, whatever that is. Server? Service? Serialization (of what)? Something else? (7) Other problems: Enumerate, MSG and iana_root_zone are used but not defined anywhere. Documentation is lacking, so I don't understand what the code is intended to do. Another class with a poor name, getRegions. There may be others, but I stopped reading around this point. I stopped looking at his pastie once the background turned black. I'd have had to copy it elsewhere to even read it. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] plotting in python
On Thu, Dec 1, 2011 at 2:38 AM, stm atoc stm.at...@googlemail.com wrote: Hi there, I have a question regarding plotting with Python. I have the following python script: [SNIPPED] plot(Conc[0],z) [SNIPPED] ---So, What would you suggest? What is the output of print len(Conc[0]), len(z) You may insert that line above the plot and see Asokan Pichai ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
