Re: Python documentation too difficult for beginners
On 03/11/10 05:04, John Nagle wrote: Right. Google does a far better job of organizing Python's documentation than the Python community does. I don't even try looking up anything starting at Python.org; I always start with a Google search. Even though Python.org's search is powered by Google, it's inferior to a general search. Compare: http://www.google.com/search?domains=www.python.orgsitesearch=www.python.orgq=open http://www.google.com/search?q=Python+open Even better: http://www.google.com/search?sitesearch=docs.python.orgq=open Regards, John McMonagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Display file names in Tkinter Listbox
s...@home.com wrote:
I have made the modifications and it does print inside the listbox,
however they are all printed on the same line.
Sorry, I didn't realize askopenfilenames returned the filenames as a
whitespace separated string, on my system they are returned as a tuple
of strings.
My files are named Name.0 Name.1 Name.2 Name.3 etc so I would like
them to be printed sorted on a separate line. When I did a
type(fileNames) it showed me that it was in unicode and printed
character per line, so I tried it this way
listFileNames = str(fileNames).split(' ')
for fileName in listFileNames:
self.lbox.insert(0, fileName)
it works but does not print sorted.
it prints
name.2
name.1
name.0
name.3
You obviously need to sort the list before you loop over the items and
add them to your listbox.
listFileNames = sorted(str(filenames).split()
Regards,
John
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Re: Display file names in Tkinter Listbox
r...@home.com wrote:
Hello,
My first attenpt at a simple python Tkinter application. I wanted to
see how to load file names into a listbox from a menu. This is what I
got until the part of displaying the file names in a listbox, which I
could not figfure out how to do?
Any help would be appreciated. Trying to do this as simple as possible
to understand.
The print fileNames does work but how to display it in listbox?
from Tkinter import *
from tkFileDialog import askopenfilenames
class MyCode:
def __init__(self):
root = Tk()
menubar = Menu(root)
filemenu = Menu(menubar)
lbox = Listbox(root, width=50).pack()
Your problem is the above line of code.
Here you are assigning the return value of the pack (None if I recall).
Later when you want to put things in the Listbox you don't have the
widget reference anymore.
It's probably a good idea to make the Listbox widget an attribute of
your class so you can use it in class methods without having to pass it
as an argument.
So, change the above line of code to:
self.lbox = Listbox(root, width=50)
self.lbox.pack()
menubar.add_cascade(label='File', menu=filemenu)
filemenu.add_command(label='New Project')
filemenu.add_command(label='Load Files...', command=self.OnLoad)
filemenu.add_command(label='Exit', command=root.quit)
root.config(menu=menubar)
root.mainloop()
def OnLoad(self):
fileNames = askopenfilenames(filetypes=[('Split Files', '*')])
print fileNames
Now that you've got a reference to your Listbox widget that is an
attribute of your class, you should be able to insert the file names
into the Listbox like so.
self.lbox.insert(0, fileNames)
Regards,
John
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Re: Python Programming Challenges for beginners?
n00m wrote: On Nov 27, 5:24 am, astral orange 457r0...@gmail.com wrote: [skip] How about the next problem: you are given string s (len(s) = ~1), in the string only letters 'a'..'z' Task: to count the number of all *different* substrings of s Example: s = 'abbaz' Its different substrings are: a b z ab bb ba az abb bba baz abbaz == Answer: 11 Way to fail dude. You're missing some sub-strings. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter / Entry widget problem
Andras Szabo wrote: Hello. I searched the archives but couldn't find a solution to a problem related to the Entry widget in Tkinter. When creating a pop-up window in an app, which contains an Entry widget, I want this widget to contain some default string, to have all this default string selected (as if the user had manually selected everything), and to have the focus transferred to this widget. (The idea is then that if the window pops up, the user won't have to click or press Tab any more before being able to type what is needed in the textbox, overwriting what is written there already.) I thought this might be the way to go: entrybox=Entry(toplevel_parent_window) entrybox.insert(0,Some default string) entrybox.select_range(0,END) entrybox.focus_set() entrybox.pack() But it doesn't seem to work - the focus is not transferred to the Entry widget, and the text does not appear to be selected (even though after this entrybox.selection_present() returns True). What am I doing wrong? andras You're probably not updating after the focus_set. Try the following: from Tkinter import * r = Tk() def click(): t = Toplevel(r) e = Entry(t) e.pack() b = Button(t, text='Close', command=t.destroy) b.pack() e.insert(0, 'Default') e.select_range(0, END) e.focus_set() r.update() b = Button(r, text='Press', command=click) b.pack() r.mainloop() Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: rectangles, or cavases, or ... ?
Alan G Isaac wrote: I need to display many (e.e., 2000) small squares whose colors are udpated each time a computation is complete. One approach is to put rectangles on a single canvas. Another approach is to put many canvases in a single frame. Another approach is to create an image each iteration, which is placed on a canvas. Other? Are there obvious considerations in the choice? (Right now I do not need to interact with the squares, but in the future I may need to.) Thanks, Alan Isaac Approach 1: put many rectangles on a single canvas This is the most flexible approach. It allows you to take advantage of Tkinter canvas tag bindings to interact with individual or groups of canvas items. It also allows you to use some pretty handy find methods for the canvas items (find_closest, find_withtag, etc). You can configure properties of the item, such as fill colour, without needing to redraw all the items. The downside of this approach is, because each rectangle you draw is a canvas item, it is also an object. The implications of this is that your memory usage increases with the more items you draw. Approach 2: put many canvasses on a frame This has no advantages. In fact it has no good points at all. Memory usage would quickly increase. You would have to use the place geometry manager to put the canvasses exactly where you want in the frame. You would have to write a bunch of custom functions to interact with all the canvasses. Approach 3: create an image and draw on a canvas This approach may be the solution if the number of canvas items becomes too memory intensive. You can construct the image object using an image library like PIL or aggdraw and place it on a Canvas. However, every time you need to update the image you need to redraw the whole image. My advice as long as your system can handle the memory usage, I would opt for the draw many rectangles on a single canvas approach. Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: How to query object of GUI?
Muddy Coder wrote: Hi Folks, I need to query the ID of GUI, in Tkinter, but don't know how to do it. This is my code: calss MyGUI: def make_menu(self): top = Menu(self) menObj = Menu(top) labels = read_from_database() for lab in labels: menObj.add_command(label=lab, command=self.do_menu) def do_menu(self): # here I need query which menu item was clicked Pass the name of the label as an argument to the callback. Below is a short working example: from Tkinter import * root = Tk() def do_menu(l): print 'menu pressed is ', l menubar = Menu(root) lab = 'test' menubar.add_command(label=lab, command=lambda l=lab: do_menu(l)) lab = 'quit' menubar.add_command(label=lab, command=lambda l=lab: do_menu(l)) root.config(menu=menubar) root.mainloop() Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter: loading file before entering mainloop
Peter Billam wrote: On 2009-03-14, Peter Otten __pete...@web.de wrote: Well, I don't know where the ymid[...] values come from. If you can guarantee that ymid[track_num] - ymid[track_num-1] 50 at some point you could reschedule loadFile() from within loadFile() and return immediately as long as that condition is not met. They're multiplied up from canvas_height = self.canvas.winfo_height() so I guess mainloop already think it's idle, while grid is still taking 10ms to work out what goes where. It's not a specifically canvas thing, because to the left of the canvas there is a frame (called trackbar) which has the same height, and self.trackbar.winfo_height() gives the same effects. Your suggestion would also defend me against small screens, or midi- -files with large numbers of tracks (I'll impose a max_retries)... Thanks, Regards, Peter You need to query the requested width and height for windows which are not yet realised. canvas_height = self.canvas.winfo_reqheight() Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting screen dims platform specific? Say it ain't so!
Lionel wrote:
Yes, it's platform specific. I was just trying anyway to see if it
would work.
In a nutshell, what I need is a way to acquire the screen dimensions
(in pixels) and its dpi setting.
This should work on all platforms:
from Tkinter import *
r = Tk()
r.withdraw()
r.winfo_screenheight()
r.winfo_screenwidth()
r.winfo_pixels('1i')
Regards,
John
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Re: string[i:j:k]
konstantin wrote: Thanks! It seems that negative step leads in reverse direction. But logic isn't completely clear for me. s = '123456789' s[::-2] '97531' but s[:-1:-2] '' though I expected something like '8642' What did i missed? -- You need to *start* at the second from last index: s[-2::-2] Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: a simple 'for' question
Ben Keshet wrote:
Hi fans,
I want to use a 'for' iteration to manipulate files in a set of folders,
something like:
folders= ['1A28','1A6W','56Y7']
for x in folders:
print x # print the current folder
f = open('my/path/way/x/my_file.txt', 'r')
...
Use os.path.join
import os
folders = ['1A2B', '1A6W', '56Y7']
for x in folders:
f = open(os.path.join('my/path/way', x, 'my_file.txt'), 'r')
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Re: Problem with a for loop and a list
Alexnb wrote: well okay, so what can I do? Firstly, stop top posting. Replies to a thread flow better if bottom posted. Secondly, it sounds like you want to build a list of the results from your entry.get() calls. Try this: self.wordList = [] def getWords(self): for entry in self.listBuffer: self.wordList.append(entry.get()) print self.wordList -- http://mail.python.org/mailman/listinfo/python-list
Re: this worked before...' '.join([`x x` for x in range(1, 6)])
[EMAIL PROTECTED] wrote: ' '.join([`x x` for x in range(1, 6)]) anyone can tell me what im doing wrong? -- http://mail.python.org/mailman/listinfo/python-list ' '.join(['%s %s' % (str(x), str(x)) for x in range(1,6)]) or ' '.join([str(x)+' '+str(x) for x in range(1,6)]) outputs '1 1 2 2 3 3 4 4 5 5' Is that what you were after ? -- http://mail.python.org/mailman/listinfo/python-list
Re: The stange behaviour of Tkinter.Canvas
James Yu wrote: I tried to update the rectangle on a canvas to get the visual effect of progressbar. It works all right if I delete the existing objects (rectangle and text) and create a new one. However, if I invoke canvas.itemconfig() to update the existing objects' options, gui just went nuts. I am more than happy to receive any help and advise. Snipped code canv.itemconfig(rect, width=width*progress/100) ## The width option of a rectangle item does not change the rectangles width, but changes the width of the rectangle perimiter line. You need to modify the coordinates of the rectangle item: canv.coords(rect, 0, 0, width*progress/100, height) Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter--unexpected behavior with pack_forget()
Kevin Walzer wrote: I'm trying to toggle the visibility of a Tkinter widget using pack_forget(), and I'm running into unexpected behavior. The widget hides correctly, but does not become visible again. My sample code is below: from Tkinter import * root = Tk() label = Label(text=Hello) label.pack() def toggle(): if label.winfo_ismapped: print mapped label.pack_forget() else: label.pack() button = Button(text=Push me, command=toggle) button.pack() root.mainloop() - The expected behavior is for the label to hide (pack_forget()) if label.winfo_ismapped returns true. That works as . However, I would also expect the widget to be displayed/packed if it is not mapped. What happens instead is that the label is apparently mapped even after I call label.pack_forget(). Can anyone point out what I'm doing wrong? Calling pack forget from Tcl maps/unmaps the widget as expected. In this case, I can't quite figure out where my error is. if label.winfo_ismapped: always evaluates to True. Instead, you need, if label.winfo_ismapped(): -- http://mail.python.org/mailman/listinfo/python-list
Re: Python - why don't this script work?
Ohmster wrote: I am trying to use this cool script that some MIT guy wrote and it just does not work, I get a stream of errors when I try to run it. It is supposed to visit a URL and snag all of the pictures on the site. Here is the script: http://web.mit.edu/pgbovine/www/image-harvester/image-harvester.py Here is my output when I try to run it on my Fedora 6 machine: [EMAIL PROTECTED] bench]$ image-harvester.py http://public.fotki.com/DaGennelman/ /home/ohmster/scripts/image-harvester.py: line 59: from: command not found [EMAIL PROTECTED] bench]$ The script is to be folowed up with another one to weed out the small thumbnails and banner images, here is the base URL: http://web.mit.edu/pgbovine/www/image-harvester/ Line 59 in image-harvester.py reads as follows: 59: from sgmllib import SGMLParser 60: import urllib 70: from urlparse import urlparse, urljoin 71: import re 72: import os# Usage: python image-harvester.py url-to-harvest Can anyone tell me what is wrong with this script and why it will not run? It does not like the command from, is there such a command in python? Does this mean that python has the import command but not the from command or do we not know this yet as it hangs right away when it hits the very first word of the script, from? Maybe this is not a Linux script or something? I wonder why it needs the x-server anyway, I tried running it from an ssh term window and it had a fit about no x-server so now I am doing this in a gnome term window. This looked so cool too. :( Please be patient with me, I do not know python at all, I just want for this script to work and if I see enough working examples of python, I may just take up study on it, but for right now, I do not know the language. Total newbie. Thanks. Your linux shell thinks it is running a shell script (from is not a valid command in bash). To execute this script with the python interpreter type (from a shell prompt): python image-harvester.py http://some.url.whatever/images_page Read the comments at the beginning of the script and you will discover all sorts of important usage information. Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: creating a tar file with python
Brian McCann wrote:
Hi,
I'm trying to create a tar file of the contents of the current directory
right now there is only one file text.xml in the current dir, I'm
using. current dir as source
but that gives syntax error
any help would be greatly appreciated
--Brian
#!/usr/bin/python
import string
import os
import sys
import time
import errno
import shutil
import tarfile
tar = tarfile.open(.,test.tar.gz, w:gz)
Contents of current directory in a new gzipped tarfile (includes
hidden *nix files):
import tarfile, glob
t = tarfile.open('tarfilename.tar.gz', 'w:gz')
for filename in glob.glob('*')+glob.glob('.*'):
t.add(filename)
t.close()
Note: this includes any subdirectories and their files below the current
level.
Regards,
John
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Re: Error with Tkinter and tkMessageBox
Fabio Z Tessitore wrote: I've tried to use Twm and SURPRISE! it works!!! Can you say why? How can I fix the prob with Gnome? Thanks I don't know why it doesn't work correctly on the version of gnome which you are running (I run KDE). Perhaps the question needs to be posed to a gnome group ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Error with Tkinter and tkMessageBox
Fabio Z Tessitore wrote: hi all, this Tkinter very simple code work fine: ## from Tkinter import * win = Tk() win.mainloop() ## but if I try to open a message box, it happens: Exception in Tkinter callback Traceback (most recent call last): File lib-tk/Tkinter.py, line 1348, in __call__ return self.func(*args) File /home/fabio/Desktop/prova.py, line 5, in reply showinfo(title='ciao', message='hello') File lib-tk/tkMessageBox.py, line 84, in showinfo return _show(title, message, INFO, OK, **options) File lib-tk/tkMessageBox.py, line 75, in _show res = Message(**options).show() File lib-tk/tkCommonDialog.py, line 52, in show s = w.tk.call(self.command, *w._options(self.options)) TclError: bad pad value 2m: must be positive screen distance ## from Tkinter import * from tkMessageBox import * def reply(): showinfo(title='ciao', message='hello') win = Tk() but = Button(win, text='press me', command=reply) but.pack() win.mainloop() ## these are versions: python: 2.4.4 or 2.5.1 Tkinter.TclVersion: 8.4 Tkinter.TkVersion:8.4 can anyone help me? thanks What window manager are you using ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter help, please...
I've made a couple of minor changes to your code from the Cribbage class down: class Cribbage: def __init__(self, win): self.parent = win# make the toplevel Tk window an # attribute of the class #Draw the interface self.f = Frame(self.parent) self.f.grid() self.cardpix = [Label(self.f), Label(self.f), Label(self.f), Label(self.f), Label(self.f)] clr = [red, blue] n = 1 for c in self.cardpix: c.configure(width=10, height=10, bg=clr[n%2], text=card +str(n)) c.grid(row=0, column=n-1) n += 1 self.scorebox = Label(self.f) self.scorebox.configure(height=5, bg=green, text=Score: 0) self.scorebox.grid(row=1, column=0, columnspan=5) def play(self): d = Deck() hand = [d.deal(), d.deal(), d.deal(), d.deal()] flipped = d.deal() hand.append(flipped) hand.sort() score = tally(hand, flipped) self.scorebox.configure(text= Score: + str(score)) #Eventually, display the actual card images, but for now... for c, x in zip(hand, self.cardpix): x.configure(text = str(c)) #I've tried both of these, to no avail. self.parent.update() update the toplevel window return score def main(): win = Tk() run = Cribbage(win) score = 0 best = 0 while score 24: score = run.play() if score = best: best = score time.sleep(1) --- short sleep to see what's happening win.mainloop() main() Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: {Possible_Spam} tkFileDialog.askopenfilename()
[EMAIL PROTECTED] wrote: Hi, When I call tkFileDialog.askopenfilename() , the dialog box opens with the current directory as the default directory. Is it possible to open the dialog box with a directory other than the current directory. Can we pass in a user defined starting directory. Thanks Rahul tkFileDialog.askopenfilename() uses the tk command tk_getOpenFile, the documentation for which is at: http://www.tcl.tk/man/tcl8.4/TkCmd/getOpenFile.htm Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Where did my post go?
[EMAIL PROTECTED] wrote: I posted to this newsgroup earlier about my annoyances with python and now I can't find the post. What did you do with it? How annoying. Seriously though, I saw it - delivered at 8:50 AEST. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter, how to get a button's bg color
[EMAIL PROTECTED] wrote:
I am new to Tkinter. Following an example, I executed the following:
window = Tk()
b = Button(window)
b.configure(bg = '#FF00FF')
b.grid(row = 0, column = 0)
how can I later get the value of this button's background color?
Thanks.
b.cget('bg')
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Re: PMW widget - skip tabbing to it
jp wrote:
On Mar 26, 10:51 am, jp [EMAIL PROTECTED] wrote:
I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
I skip over these widgets when using the tab key?
Thank you,
John
What version of Pmw are you using ? Tabbing between widgets works fine
on my system (Pmw 1.2, tk 8.4, KDE)
I can change the focus behaviour by using the takefocus option. You
were on the right track, you just did it wrong (see code below):
from Tkinter import *
import Pmw
root = Tk()
entry = Pmw.EntryField(root, labelpos=W, value=, label_text='Name:')
entry.grid(row=1)
entry.component('entry').configure(takefocus=0)
Button(root,text='test1').grid(row=2)
Button(root,text='test2').grid(row=3)
Button(root,text='test3').grid(row=4)
root.mainloop()
#
Regards,
John
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Re: Associate image name with list item
Kevin Walzer wrote:
I'm trying to avoid a *lot* of typing in my Tkinter application by
associating image names with items in a list. Here is my sample list:
self.catlist = [
'all', 'installed', 'base', 'crypto', 'database', 'devel',
'editors', 'games', 'gnome', 'graphics', 'kde', 'languages',
'libs', 'libs_perlmods',
'libs_pythonmods', 'libs_rubymods', 'net', 'sci', 'shells',
'sound', 'text', 'web',
'x11_system', 'x11-wm', 'x11'
]
I've also already created a bunch of images with names that correspond
to the list above, i.e. self.all, self.installed, and so on. Here's the
rest of my code:
for item in self.catlist:
print item
self.categorytable.insert(END, item)
self.categorytable.cellconfigure(end,0, image=self.item)
This yields the following error:
AttributeError: item
because, of course, I don't actually have an image called self.item.
What I'm trying to do is get the value of the variable item and plug
it into the image name, so that self.item actually corresponds to
self.installed, self.base, etc. Trying something like
self.categorytable.cellconfigure(end,0, image=self.%s % item)
just yields a syntax error: SyntaxError: invalid syntax
Can anyone point me in the right direction?
Create a dictionary mapping the name to the image object. For example:
# Create all your images first
# Map a name to the image object
self.catdict = {'all' : self.all, 'installed' : self.installed, ...}
# Loop over the image names and do your stuff
for item in self.catdict.keys():
print item
self.categorytable.insert(END, item)
self.categorytable.cellconfigure(end,0,image=self.catDict.get(item))
Regards,
John
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Re: help with radionbutton
Sang Park wrote: how do I select radionbutton by default? for my school project, I need to have 10 radio buttons and have half of them selected I have for i in range(10): x = IntVar() if i 5: rb = Radiobutton(buttonFrame, variable=x, value=1,state=DISABLED) else: rb = Radiobutton(buttonFrame, variable=x, value=0,state=DISABLED) I tried x.set(1) or x.set(0) before or after but the all seem to be deselected when displayed on the screen I also tried calling rb.select/deselect() but that doesn't seem to work either... can anyone help me? Sounds like you actually want to use Checkbuttons. Radiobuttons allow unique selections from a group all tied to a single variable whereas Checkbuttons act like an on/off toggle. Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem I have with a while loop/boolean/or
[EMAIL PROTECTED] wrote: Hi all. I have a problem with some code :( --- hint = raw_input(\nAre you stuck? y/n: ) hint = hint.lower() while (hint != 'n') or (hint != 'y'): hint = raw_input(Please specify a valid choice: ) - so everytime I run the program, and enter my choice as y or n, I'm told to 'Please Specify a valid Choice Again' and can't get out of the loop. --- hint = raw_input(\nAre you stuck? y/n: ) hint = hint.lower() while (hint != 'n'): hint = raw_input(Please specify a valid choice: ) - As for here when I enter n, I can leave the while loop. Anyway I can't put my finger on this, so I'd be real grateful if someone could tell me what I've done wrong. Thanks. (I have a guy feeling it's something really silly I'm overlooking...) Try it a different way: while True: hint = raw_input(\nAre you stuck? y/n: ) hint = hint.lower() if hint != 'y' and hint != 'n': print Please answer y or n continue else: break if hint == 'y': do_your_hint_stuff() -- http://mail.python.org/mailman/listinfo/python-list
Re: {Possible_Spam} Re: {Possible_Spam} tkinter text editor
-- Original Message ---
From: Gigs [EMAIL PROTECTED]
To: John McMonagle [EMAIL PROTECTED]
Sent: Sat, 10 Mar 2007 15:13:20 +0100
Subject: {Possible_Spam} Re: {Possible_Spam} tkinter text editor
John McMonagle wrote:
Gigs_ wrote:
I'm writing text editor.
How to enable/disable (cut, copy etc.) when text is selected/not
selected
Bind the Button1-ButtonRelease event to a function which checks the
length of the SEL tag of the text widget. If it is zero length,
disable the appropriate menu entries, if it is non-zero, enable the
appropriate menu entries.
Simple example:
from Tkinter import *
root = Tk()
textWidget = Text(root)
textWidget.pack()
def onButton1Release(event):
if len(textWidget.tag_ranges(SEL)) == 0:
print 'No text selected. Disable appropriate menu entries'
else:
print 'Some text selected. Enable appropriate menu entries'
textWidget.bind('Button1-ButtonRelease', onButton1Release)
root.mainloop()
thx, but what i dont know is how to change state on menu item.
I dont know how to access that menu item later.
I know on button like
B = Button(root)
B.pack()
and later i change with B.config(blabla)
but on menu i have more items like
M = Menu(root)
i.add_command(label='one', command=show1)
i.add_command(label='two', command=show2)
M.add_cascade(label='File', menu=i)
how to change item: 'two'
Use the entry config method of the Menu widget:
i.entryconfig('one', state=DISABLED)
Here is some recommended reading:
http://www.pythonware.com/library/tkinter/introduction/x5841-methods.htm
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Re: {Possible_Spam} tkinter text editor
Gigs_ wrote:
I'm writing text editor.
How to enable/disable (cut, copy etc.) when text is selected/not selected
Bind the Button1-ButtonRelease event to a function which checks the
length of the SEL tag of the text widget. If it is zero length, disable
the appropriate menu entries, if it is non-zero, enable the appropriate
menu entries.
Simple example:
from Tkinter import *
root = Tk()
textWidget = Text(root)
textWidget.pack()
def onButton1Release(event):
if len(textWidget.tag_ranges(SEL)) == 0:
print 'No text selected. Disable appropriate menu entries'
else:
print 'Some text selected. Enable appropriate menu entries'
textWidget.bind('Button1-ButtonRelease', onButton1Release)
root.mainloop()
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Re: Tkinter __call__
Gigs_ wrote:
from Tkinter import *
from tkFileDialog import askopenfilename
from tkColorChooser import askcolor
from tkMessageBox import askquestion, showerror
from tkSimpleDialog import askfloat
demos = {
'Open': askopenfilename,
'Color': askcolor,
'Query': lambda: askquestion('Warning', 'You typed
...\nConfirm?'),
'Error': lambda: showerror('Error!', He's dead, Jim),
'Input': lambda: askfloat('Entry', 'Enter credit card number')
}
class Demo(Frame):
def __init__(self, parent=None):
Frame.__init__(self, parent)
self.pack()
Label(self, text=Basic demos).pack()
for (key, value) in demos.items():
func = (lambda key=key: self.printit(key))
Button(self, text=key, command=func).pack(side=TOP, fill=BOTH)
def printit(self, name):
print name, 'returns =', demos[name]()
I have tried but cant get it to work properly.
I want to instead printit method to put __call__ and call it like that
Can someone help me, please?
Add the following lines to the end of your script and all should work as
expected:
root = Tk()
app = Demo(root)
root.mainloop()
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Re: Need Simple Way To Determine If File Is Executable
Tim Daneliuk wrote: I have a program wherein I want one behavior when a file is set as executable and a different behavior if it is not. Is there a simple way to determine whether a given named file is executable that does not resort to all the lowlevel ugliness of os.stat() AND that is portable across Win32 and *nix? os.access(pathToFile, os.X_OK) -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: No output from popen in Tkinter text widget
Kevin Walzer wrote:
I'm trying to display the output of an external process (invoked via
popen) in a Tkinter text widget. I successfully start the process (based
on what I'm seeing in my terminal output), but I can't get the output to
display in the Tkinter widget. It seems to block.
Any ideas? My code is below:
def runDump(self):
self.password.destroy()
self.passtext = self.passtext.get()
file = os.popen('echo %s | sudo -S /usr/sbin/tcpdump -v -i
en1' % self.passtext, 'r')
for line in file:
self.t.insert(END, line)
self.t.update()
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Re: Tkinter: Strange behavior using place() and changing cursors
Mudcat wrote: Is there something I'm supposed to do in order to prevent this from happening? Yes. Instead of configuring the cursor on the frame, do it on the master: self.master.configure(cursor='sb_h_double_arrow') -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to find out the directory that the py file is in?
On Wed, 2006-10-25 at 02:49 +0100, Steve Holden wrote: [EMAIL PROTECTED] wrote: On Oct 24, 7:01 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: At Tuesday 24/10/2006 20:39, [EMAIL PROTECTED] wrote: I have the following python script and some_command in the same directory. I have to call the python script from that directory. Otherwise, some_command won't be found. I'm wondering how to make the following script working no matter what the working directory is.print os.path.abspath(__file__) How to get the absolute dir name which the file is in? Is there any function can be called easily? Thanks, Peng That would be os.path.split(os.path.abspath(__file__))[0] You *are* planning to read the documentation at some stage, right? ;-) More simple: os.path.dirname(os.path.abspath(__file__)) -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Delete items in nested dictionary based on value.
Assuming dict_sweep worked perfectly it would take input like this:
A_in = {1: {2: 2, 3: {1: None, 2: 2}}, 2: 2, 3: None}
B_in = {1: {1: {1: None, 2: {1: None}}, 2: 2, 3: None}
and output this:
A_out = {1: {2: 2, 3: {2: 2}}, 2: 2}
B_out = {2:2}
This dict_sweep above obviously doesn't work and I'm rather afraid of
hitting python's recursion limit. Does anyone see a way to modify
dict_sweep in it's current state to perform dictionary sweeps like
this? What about a non-recursive implementation of dict_sweep?
How about this:
A_in = {1: {2: 2, 3: {1: None, 2: 2}}, 2: 2, 3: None}
def dict_sweep(dictin):
for key in dictin.keys():
if dictin.get(key) == None:
del dictin[key]
elif type(dictin[key]) is dict:
dictin[key] = dict_sweep(dictin[key])
return dictin
A_out = dict_sweep(A_in)
print A_out
Running the above returns:
{1: {2: 2, 3: {2: 2}}, 2: 2}
Regards,
John
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Re: wxPython: StaticText Event
Hovering mouse over the StaticText Control should generate an EVT_ENTER_WINDOW event like the TextCtrl Control, but it does not happen. How can I make the StaticText event working? According to the book wxPython In Action, page 186: One feature that you cannot see from just the figure is that the wx.StaticText window never receives or responds to mouse events, and never takes the user focus. If you want to create static text that responds to mouse events, try using the wx.lib.stattext.GenStaticText class. Add the following import: import wx.lib.stattext Then, self.st = wx.lib.stattext.GenStaticText(self.pnl, -1, 'Static Text Control', pos=(30,20)) Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: split string problems
On Thu, 2006-09-07 at 16:21 -0700, Tempo wrote: [span class=sale $14.99 /span, span class=sale $27.99 /span, span class=sale $66.99 /span, span class=sale $129.99 /span, span class=sale $254.99 /span] Worked alright for me (see below). Are you sure p is a string ? Cut and paste from interactive python shell: p = ... [span class=sale ... $14.99 ... /span, span class=sale ... $27.99 ... /span, span class=sale ... $66.99 ... /span, span class=sale ... $129.99 ... /span, span class=sale ... $254.99 ... /span] p.split() ['[span', 'class=sale', '$14.99', '/span,', 'span', 'class=sale', '$27.99', '/span,', 'span', 'class=sale', '$66.99', '/span,', 'span', 'class=sale', '$129.99', '/span,', 'span', 'class=sale', '$254.99', '/span]'] p.split()[2] '$14.99' Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter text Key event
On Wed, 2006-09-06 at 17:54 -0700, Jay wrote: I'm having trouble with using the Key event with the Text object. When I use them together (which is a logical combination), I use this code: textbox = Text(root, wrap=word, height=15, width=50) textbox.bind(Key, resolveGlyphs) def resolveGlyphs(event): textBuf = textbox.get(1.0, END) print(textBuf) What it prints out for me is everything except for the last character -- the one that triggered the event. How can I get the entire contents? bind the textbox to the KeyRelease event because by then it has been drawn on the Text widget. The Key event is equivalent to the KeyPress event Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: eval() woes
On Mon, 2006-08-28 at 21:13 -0700, rdrink wrote: (BTW, as a footnote: For each of the above 'equations' the function equate() was called 500 times... in some cases with the list 'parts' equaling things like ['0',2','3','0'], so I have no reason to believe that the problem is with the way the list is being passed in... but I could be wrong) Can anyone see something I can't? Why don't you simply print parts as the first statement of your equate function to check what its value is. Then work out where in your code parts is being modified (especially parts[1]). Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: using python at the bash shell?
On Mon, 2006-08-07 at 21:03 -0400, John Salerno wrote: Hi all. I just installed Ubuntu and I'm learning how to use the bash shell. Aside from the normal commands you can use, I was wondering if it's possible to use Python from the terminal instead of the normal bash commands (e.g. print instead of echo). From a terminal window typing, python -c print 'testing' would produce the same results as echo 'testing' in bash shell, but obviously not as nice. My main reason for asking is that I like using Python for everything, and if I don't need to learn the bash 'language', then I won't just yet. Just type python and do your stuff in the python interpreter. This becomes your shell. This then got me thinking, how about making python your login shell. So I modified my shell login entry in /etc/passwd to /usr/bin/python, logged in and voila, I was presented with my friendly python shell upon opening a terminal window. So the answer is Yes. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Import module with non-standard file name
On Tue, 2006-08-08 at 11:06 +1000, Ben Finney wrote: Howdy all, Question: I have Python modules named without '.py' as the extension, and I'd like to be able to import them. How can I do that? Background: On Unix, I write programs intended to be run as commands to a file with no extension. This allows other programs to use the command as an interface, and I can re-write the program in some other language without obsoleting the commandline interface. e.g., I might write 'frobnicate-foo' as a shell program so that other programs can 'frobnicate-foo --bar baz'. If I later decide to re-implement 'frobnicate-foo' in Python, I'll save the top level module to the same file name since it implements the same command-line interface. Now that I've got it written as a Python module, I'd like to write unit tests for that module, which of course will need to import the program module to test it. The unit test can explicitly add the directory where the program module lives to 'sys.path' for the purpose of importing that module. However, the Python reference tells me that 'import' (specifically, '__import__()') needs modules to live in files named a particular way: with a '.py' suffix. But my module is in a file called 'frobnicate-foo', with no suffix, and that's part of the definition of the program interface. I don't want symbolic links, or anything else that presents two filenames for the same module, because there's no need for that except for Python's apparent insistence on a particular naming convention. Also, avoiding symbolic links inside the source code tree makes version control smoother. What are my options to import a module from a file whose name can't change? Why don't you just create a link to the appropriate script ? For example, [EMAIL PROTECTED] ~]$ ln -s frobnicate-foo.py frobnicate-foo [EMAIL PROTECTED] ~]$ ll frobnicate* lrwxrwxrwx 1 me mygroup 17 Aug 8 12:56 frobnicate-foo - frobnicate-foo.py* -rwxr-xr-x 1 me mygroup 0 Aug 8 12:55 frobnicate-foo.py* -rwxr-xr-x 1 me mygroup 0 Aug 8 12:55 frobnicate-foo.sh* [EMAIL PROTECTED] ~]$ That way you can keep the bash shell script and the python script independent of one another and you can still import for your unit testing without any trickery. Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: is it possible to dividing up a class in multiple files?
On Mon, 2006-08-07 at 15:41 +0200, Martin Höfling wrote: Hi there, is it possible to put the methods of a class in different files? I just want to order them and try to keep the files small. Here's how I do it: Firstly, I create a file called imports.py which contains all my import statements. These are obviously indented at the zero position. I then create a classname.py file. This just has the class statement (eg: class Foo:) . I then create a separate file for each function in the class. Eg: init.py, function1.py, etc). These must be indented by one indent position. I then create a main.py file. This contains statements to be executed after all the statements in the class. I create a shell script which concatenates the files in the correct order eg: cat imports.py \ classname.py \ init.py \ function1.py \ ... ... .. main.py module.py I use the concatenated file, module.py, as the program to run or import. I find it easier to maintain code in this way - if I need to make a change to a particular function, I just edit the file in which the function is defined and re-run the shell script to make the program. If I need to add a new function to the class I just need to create a new file and add its entry to the shell script in the correct place and re-run the shell script. Of course you are not limited to a single function per file, but that is what works best for me. Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: two embedded problem. one maybe is python bug.
On Fri, 2006-08-04 at 11:10 +0800, yy x wrote:
hi,all,
the content of a.py :
#coding:gb2312
#/usr/local/bin/python
import random
print random.randint(0,10)
the c program:
#include Python.h
int main()
{
Py_Initialize();
PyRun_SimpleString(import sys);
PyRun_SimpleString(sys.path.append('.'));
PyRun_SimpleString(import a);
Py_Finalize();
return 0;
}
the gcc cmd line:
g++ -o a a.c
-I/usr/local/include/python /usr/local/lib/libpython -lm -lpthread
-ldl
First problem:
when i run the a, the error msg is :
Traceback (most recent call last):
File string, line 1, in ?
File ./a.py, line 1
SyntaxError: encoding problem: with BOM
but if i first import a.py through the python cmd line. This problem
disappears.(but second problem appears)(now I think the a import
a.pyc not a.py)
I think it's python bug, isn't it?
Second problem,
Traceback (most recent call last):
File string, line 1, in ?
File a.py, line 3, in ?
import random
File /usr/local/lib/python2.4/random.py, line 44, in ?
from math import log as _log, exp as _exp, pi as _pi, e as _e
ImportError: /usr/local/lib/python2.4/lib-dynload/math.so: undefined
symbol: PyExc_OverflowError.
Pls give me some advice, i am crazy.thanks
Sorry, but both programs work fine on my system (Mandriva Linux 2006
-2.6.12 kernel, python 2.4.1, gcc 4.0.1).
Obviously I had to change a couple of paths to includes and libraries,
but apart from that running a.py and the compiled c program worked fine.
Perhaps it would help if you told us a bit about your particular
configuration.
Regards,
John
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Re: Working with Widget after Instance loses the reference
On Mon, 2006-07-31 at 11:15 -0700, Al in Dallas wrote:
I made the mistake of creating an instance of a widget and assigning it
to a name I'd already used. Now, if I use root.children or
root.slaves(), I can see the lost widget, but can I do anything else
with the string of numbers that shows up when I use root.children? I'd
like to destory the widget, for example. it would be even better if I
could create a new name and have it reference the lost widget.
Of course, I can just kill my toplevel and start over.
Consider the following code run in the python shell:
from Tkinter import *
r = Tk()
b1 = Button(r, text='test')
b1.pack()
b2 = Button(r, text='test2')
b2.pack()
r.children
{'-1210160564': Tkinter.Button instance at 0xb7de6a4c, '-1210225748':
Tkinter.Button instance at 0xb7dd6bac}
r.slaves()
[Tkinter.Button instance at 0xb7dd6bac, Tkinter.Button instance at
0xb7de6a4c]
b1 = 'xxx'
b1.destroy()
Traceback (most recent call last):
File stdin, line 1, in ?
AttributeError: 'str' object has no attribute 'destroy'
b1 = r.slaves()[0]
b1.destroy()
So, as long as you know what your widget instance is in root.slaves() or
root.children you can assign it to a new name.
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Re: how best to check a value? (if/else or try/except?)
On Thu, 2006-07-27 at 20:44 +, John Salerno wrote: My code is below. The main focus would be on the OnStart method. I want to make sure that a positive integer is entered in the input box. At first I tried an if/else clause, then switched to try/except. Neither is perfect yet, but I was wondering which I should try for in the first place. I figure I need to check for an emptry string, non-numeric strings (maybe these are the same check), 0 and negative numbers (which might also fall into the category of 'anything but a number' because of the negative sign). Have a look at using a wx.Validator in your wx.TextCtrl. Syntax for wx.TextCtrl: wx.TextCtrl(parent, id, value=, pos=wx.DefaultPosition, size=wx.DefaultSize, style=0, validator=wx.DefaultValidator, name=wx.TextCtrlNameStr) This will enable you to automagically check the TextCtrl if it's empty, has wrong data type, does not meet a prescribed condition (eg: no negative numbers) and do something if it does not pass validation (eg: colour the background of the TextCtrl red, initiate a system beep, etc). Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: update a window with tkinter ...
On Thu, 2006-07-27 at 19:56 +0200, Laurent Hermann wrote: Hi I'm new on this list so let me say hello to everybody. I have a little problem with tkinter but I could not find the solution on the net so I ask it here... The thing I want to do is simple but I cannot, I would like to have a tkinter window that update itself during the program is running, I created a small exemple : from Tkinter import * import time fen1=Tk() can1=Canvas(fen1,bg='dark grey',height=100,width=100) can1.pack() a=0 while(a10): time.sleep(1) tex1=can1.create_text (10*a,10*a,text=a) a=a+1 Change the loop to: while a10: time.sleep(1) can1.create_text(10*a, 10*a, text=str(a)) # a should be a string for a canvas text object a += 1 can1.update() can1.pack() Don't need to repack canvas widget. fen1.mainloop() Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: webbrowser open failing
On Wed, 2006-07-26 at 17:09 +1200, Thomas wrote: Hi all, I am getting an error using webbrowser open on mac 10.3 using python 2.3.5 test=open(/Volumes/TINTZ;P3/DT Hot Folder test/Justin_Test.pDF,r) type(test) type 'file' webbrowser.open(/Volumes/TINTZ;P3/DT Hot Folder test/Justin_Test.pDF,r) Traceback (most recent call last): File stdin, line 1, in ? File /System/Library/Frameworks/Python.framework/Versions/2.3/lib/ python2.3/webbrowser.py, line 43, in open get().open(url, new, autoraise) File /System/Library/Frameworks/Python.framework/Versions/2.3/lib/ python2.3/webbrowser.py, line 314, in open ic.launchurl(url) File /System/Library/Frameworks/Python.framework/Versions/2.3/lib/ python2.3/plat-mac/ic.py, line 235, in launchurl return _dft_ic.launchurl(url, hint) File /System/Library/Frameworks/Python.framework/Versions/2.3/lib/ python2.3/plat-mac/ic.py, line 202, in launchurl self.ic.ICLaunchURL(hint, url, 0, len(url)) MacOS.Error: (-673, 'no URL found') Try opening a file-type URL: eg: webbrowser.open(file://Volumes/TINTZ;P3/DT) No need for the 'r' argument to open. Syntax is: webbrowser.open(url [, new]) If new is True a new browser window is opened. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: function to convert degree (hour), minute, seconds string to integer
On Wed, 2006-07-26 at 20:18 -0700, John Machin wrote: [EMAIL PROTECTED] wrote: I know this is a trivial function, and I've now spent more time searching for a surely-already-reinvented wheel than it would take to reinvent it again, but just in case... is there a published, open-source, function out there that takes a string in the form of hh:mm:ss (where hh is 00-23, mm is 00-59, and ss is 00-59) and converts it to an integer (ss + 60 * (mm + 60 * hh))? I'd like something that throws an exception if hh, mm, or ss is out of range, or perhaps does something reasonable (like convert 01:99 to 159). Thanks, --dang p.s. In case this looks like I'm asking for a homework exercise, here's what I'm using now. It returns False or raises a ValueError exception for invalid inputs. I'm just wondering if there's an already-published version. def dms2int(dms): Accepts an 8-character string of three two-digit numbers, separated by exactly one non-numeric character, and converts it to an integer, representing the number of seconds. Think of degree, minute, second notation, or time marked in hours, minutes, and seconds (HH:MM:SS). return ( len(dms) == 8 and 00 = int(dms[0:2]) 24 and dms[2] not in '0123456789' and 00 = int(dms[3:5]) 60 and dms[5] not in '0123456789' and 00 = int(dms[6:8]) 60 and int(dms[6:8]) + 60 * (int(dms[3:5]) + 60 * int(dms[0:2])) ) Have you considered time.strptime()? BTW, your function, given 00:00:00 will return 0 -- you may well have trouble distinguishing that from False (note that False == 0), without resorting to ugliness like: if result is False ... Instead of returning False for some errors and letting int() raise an exception for others, I would suggest raising ValueError yourself for *all* invalid input. You may wish to put more restrictions on the separators ... I would be suspicious of cases where dms[2] != dms[5]. What plausible separators are there besides :? Why allow alphabetics? If there's a use case for 23h59m59s, that would have to be handled separately. Note that 06-12-31 could be a date, 12,34,56 could be CSV data. Cheers, John You may also want to look at the dateutil module (especially dateutil.parse). -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Help in string.digits functions
On Mon, 2006-07-24 at 22:19 -0700, Anoop wrote: Hi All I am getting two different outputs when i do an operation using string.digits and test.isdigit(). Is there any difference between the two. I have given the sample program and the output Thanks for ur inputs Anoop #1: ~~ import string test='121206' if test not in string.digits: print I am Not Digit else: print I am Digit #2: ~~ import string test='121206' if not test.isdigit(): print I am Not Digit else: print I am Digit Output ~ #1:I am Not Digit #2:I am Digit Thnks and Rgds Anoop string.digits is the string constant '0123456789' So your test, if test not in string.digits: will evaluate True because '121206' is not in '0123456789'. Whereas test.isdigit() returns true if all the characters in test are digits. So yes, there is a big difference between the two. Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter focus_set use with grid
On Thu, 2006-07-20 at 02:53 +, Stan Cook wrote: A newbie to Tkinter here. . . . . . I'm trying to set the focus on an Entry textbox with focus_set. I am using the grid manager. I created the same interface before using the pack() method and the focus_set worked, but now it says AttributeError: 'NoneType' object has no attribute 'focus_set' Below is the section of the code: # CREATES THE GUI FOR DCN INPUT def get_dcn(): master = Tk() _dcn = StringVar() label1 = Label(text=Enter DCN:,width=10).grid(row=0) txtbox = Entry(relief=SUNKEN, width=20, takefocus=1, textvariable=_dcn).grid(row=0, column=1) txtbox.focus_set() btnOK= Button(text=OK,command=assign_dcn(_dcn)).grid(row=1, column=0) btnCancel = Button(text=Cancel, command=killer).grid(row=1, column=1) master.mainloop() return Does anyone know where I went wrong? Yes. You set txtbox to be the return result of Entry(...).grid(...) which is None. What you want to do is is set txtbox to a tkinter instance: def get_dcn(): master = Tk() _dcn = StringVar() label1 = Label(text=Enter DCN:,width=10) label1.grid(row=0) txtbox = Entry(relief=SUNKEN, width=20, takefocus=1, textvariable=_dcn) txtbox.grid(row=0, column=1) txtbox.focus_set() btnOK= Button(text=OK,command=assign_dcn(_dcn)) btnOK.grid(row=1, column=0) btnCancel = Button(text=Cancel, command=killer) btnCancel.grid(row=1, column=1) master.mainloop() return Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter help
On Tue, 2006-07-18 at 08:37 -0700, groves wrote: hi eveyrbody , i have started working on python tkinter, While I was working on one of the tkinter classes..named listbox widget. I had a slight problem. Now let me tell you that i was able to create a simple listbox which had 6 options which one can select, but Now what I want is that from the available menu, if I select an option it should give me another menu associated with that option. Its like digging up that option to do advance search. Please I need help as I am making my project Thanks to eveyrbody who will take time to read this and solve it . Perhaps if you posted your code so far we could help - otherwise we would just be shooting in the dark. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter StringVar mystery
On Mon, 2006-07-17 at 15:00 -0600, Bob Greschke wrote: First off I have this class (thanks to whoever came up with this way back when): ## # BEGIN: class Command # LIB:Command():2006.110 #Pass arguments to functions from button presses and menu selections, #bind's. Nice! #In your declaration: #...command = Command(func, args,...) class Command: def __init__(self, func, *args, **kw): self.func = func self.args = args self.kw = kw def __call__(self, *args, **kw): args = self.args+args kw.update(self.kw) apply(self.func, args, kw) # END: class Command Then in the setup part of an entry form I have: # CHBCBarcodeLastVar is the variable for an Entry() field Button(SubFrame, text = Print Barcode, \ command = Command(test, other, CHBCBarcodeLastVar.get(), \ CHBC)).pack(side = LEFT) Then this is a/the test function: def test(What, BC, Where, e = None): # Does print the correct value print CHBCBarcodeLastVar.get() # Does change the field on the form CHBCBarcodeLastVar.set(5) # BC is print :+What+:, :+BC+:, :+Where+: return Everything works as it should, except when the Button is clicked BC is an empty str in test(). How come? (I really have NO clue how that Command class works, but I use it like crazy. Is it the problem?) The problem is when you are creating the Print Barcode button. Think about what the value of CHBCBarcodeLastVar.get() is when you create the button ? I bet it is an empty string. This value will always be passed to test, regardless of how it changes in the future. What you probably want is to pass the StringVar reference and then do a get in test. Eg: # CHBCBarcodeLastVar is the variable for an Entry() field Button(SubFrame, text = Print Barcode, \ command = Command(test, other, CHBCBarcodeLastVar, \ CHBC)).pack(side = LEFT) def test(What, BC, Where, e = None): print :+What+:, :+BC.get():, :+Where+: return Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: execute a shell script from a python script
On Mon, 2006-07-17 at 16:59 -0700, spec wrote: Thanks, actually there are no args, is there something even simpler? Thanks Frank Thomas Nelson wrote: If your script is foo.sh and takes args: import subprocess subprocess.call([foo.sh,args],shell=True) Should work fine. check out http://www.python.org/dev/doc/maint24/lib/module-subprocess.html Enjoy, THN spec wrote: Hi all, I know nothing about Python. What I need to do is to get a Python script to execute a local shell script. I do not need any output. What would be th eeasiest way to accomplish this? Thanks! -- http://mail.python.org/mailman/listinfo/python-list Check out os.popen4 or the commands module. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Find and Delete all files with .xxx extension
On Wed, 2006-07-12 at 16:12 -1000, normt's subject read: Find and Delete all files with .xxx extension How ? In the current directory/folder ? Recursively search through all the directories/folders from a certain path ? I suggest you look at the os module (section about Files and Directories) http://docs.python.org/lib/os-file-dir.html -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Mouse wheel event for Canvas
On Thu, 2006-06-22 at 14:24 +1000, John McMonagle wrote:
I tried binding mouse wheel events (Button-4, Button-5) to a Tkinter
Canvas widget with the hope of using the event.delta value to
subsequently scroll the Canvas.
However, it seems that event.delta always returns 0.
For example,
from Tkinter import *
r = Tk()
c = Canvas(r, scrollregion=(0,0,500,500), height=200, width=200)
s = Scrollbar(r, command=c.yview)
c.pack(side=LEFT)
s.pack(side=RIGHT, fill=Y)
c.configure(yscrollcommand=s.set)
c.create_rectangle(10,10,100,100)
c.create_rectangle(10,200,100,300)
def rollWheel(event):
print event.delta
c.bind('Button-4', rollWheel)
c.bind('Button-5', rollWheel)
c.focus_set()
r.mainloop()
Has anyone successfully managed to wheel scroll a Tkinter Canvas
widget ?
Regards,
John
I worked it out.
c.bind('Button-4', lambda event: event.widget.yview_scroll(-1, UNITS))
c.bind('Button-5', lambda event: event.widget.yview_scroll(1, UNITS))
I also changed the yscrollincrement to '5p'. The default moved a bit
too much.
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Mouse wheel event for Canvas
I tried binding mouse wheel events (Button-4, Button-5) to a Tkinter
Canvas widget with the hope of using the event.delta value to
subsequently scroll the Canvas.
However, it seems that event.delta always returns 0.
For example,
from Tkinter import *
r = Tk()
c = Canvas(r, scrollregion=(0,0,500,500), height=200, width=200)
s = Scrollbar(r, command=c.yview)
c.pack(side=LEFT)
s.pack(side=RIGHT, fill=Y)
c.configure(yscrollcommand=s.set)
c.create_rectangle(10,10,100,100)
c.create_rectangle(10,200,100,300)
def rollWheel(event):
print event.delta
c.bind('Button-4', rollWheel)
c.bind('Button-5', rollWheel)
c.focus_set()
r.mainloop()
Has anyone successfully managed to wheel scroll a Tkinter Canvas
widget ?
Regards,
John
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Re: tkinter: making widgets instance or not?
On Tue, 2006-06-06 at 19:42 +, John Salerno wrote:
Fredrik Lundh wrote:
however, if you need to access a widget later on, it might be a good
idea to save a reference to it somewhere...
To follow up on that point, I have the following code now. I have two
questions about it:
1. Can I somehow make the passing of 'master' to the draw_entry method
automatic, so I don't have to type it each time I call the function?
2. Related to your comment, the obvious problem here is that it doesn't
save references to the text box names, so I can't access them later. Is
there still a way to automate the process like I've done, but have each
entry field have a separate name?
Thanks.
---
import Tkinter as tk
class App:
def __init__(self, master):
self.draw_entry(master, 'First Name:')
self.draw_entry(master, 'Last Name:')
def draw_entry(self, master, label_text):
frame = tk.Frame(master, bd=4)
frame.pack()
self.label = tk.Label(frame, text=label_text, width=10)
self.label.pack(side=tk.LEFT)
self.entry = tk.Entry(frame)
self.entry.pack(side=tk.LEFT)
root = tk.Tk()
app = App(root)
root.resizable(width=False, height=False)
root.mainloop()
--
Try this:
import Tkinter as tk
class App:
def __init__(self, master):
self.parent = master
self.entry1 = self.draw_entry('First Name:')
self.entry2 = self.draw_entry('Last Name:')
def draw_entry(self, label_text):
frame = tk.Frame(self,parent, bd=4)
frame.pack()
label = tk.Label(frame, text=label_text, width=10)
label.pack(side=tk.LEFT)
entry = tk.Entry(frame)
entry.pack(side=tk.LEFT)
return entry
root = tk.Tk()
app = App(root)
root.resizable(width=False, height=False)
root.mainloop()
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Re: tkinter: making widgets instance or not?
On Wed, 2006-06-07 at 09:27 +1000, John McMonagle wrote:
On Tue, 2006-06-06 at 19:42 +, John Salerno wrote:
Fredrik Lundh wrote:
however, if you need to access a widget later on, it might be a good
idea to save a reference to it somewhere...
To follow up on that point, I have the following code now. I have two
questions about it:
1. Can I somehow make the passing of 'master' to the draw_entry method
automatic, so I don't have to type it each time I call the function?
2. Related to your comment, the obvious problem here is that it doesn't
save references to the text box names, so I can't access them later. Is
there still a way to automate the process like I've done, but have each
entry field have a separate name?
Thanks.
---
import Tkinter as tk
class App:
def __init__(self, master):
self.draw_entry(master, 'First Name:')
self.draw_entry(master, 'Last Name:')
def draw_entry(self, master, label_text):
frame = tk.Frame(master, bd=4)
frame.pack()
self.label = tk.Label(frame, text=label_text, width=10)
self.label.pack(side=tk.LEFT)
self.entry = tk.Entry(frame)
self.entry.pack(side=tk.LEFT)
root = tk.Tk()
app = App(root)
root.resizable(width=False, height=False)
root.mainloop()
--
Try this:
import Tkinter as tk
class App:
def __init__(self, master):
self.parent = master
self.entry1 = self.draw_entry('First Name:')
self.entry2 = self.draw_entry('Last Name:')
def draw_entry(self, label_text):
frame = tk.Frame(self,parent, bd=4)
Sorry - typo. Should reas self.parent not self,parent
frame.pack()
label = tk.Label(frame, text=label_text, width=10)
label.pack(side=tk.LEFT)
entry = tk.Entry(frame)
entry.pack(side=tk.LEFT)
return entry
root = tk.Tk()
app = App(root)
root.resizable(width=False, height=False)
root.mainloop()
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Re: Tkinter - changing existing Dialog?
On Thu, 2006-06-01 at 08:31 -0400, Michael Yanowitz wrote: Hello: I have a Tkinter GUI Dialog with many buttons and labels and text widgets. What I would like to do is, can I: 1) Disable/deactivate/hide a button, text widget that is already drawn (and of course the opposite enable/activate/show it)? 2) Change the text of a label or button that is already drawn? based on actions taken by the user. Can it be done without destroying the present dialog or the objects in it and creating a new one? Sorry for what probably is such a trivial and basic question. I just can't find the answer or know what the technical term for what I want to do is to search for it myself. To disable/deactivate a button widget, use the keyword 'state'. For example, import Tkinter as Tk root = Tk.Tk() bid = Tk.Button(root, text='test', state=Tk.NORMAL) bid.pack() bid.configure(state=Tk.DISABLED) If you want to hide the button (using Pack geometry manager): bid.pack_forget() You can pack it again using bid.pack() but it may be difficult to pack it back where you originally intended. If you are using the Grid geometry manager: bid.grid_forget() To put it back simply call grid again with the same row, column. Changing the text of a label or button already drawn is simply done by a call to the configure method on the button or label's text attribute: bid.configure(text='Help') Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter question
On Wed, 2006-05-31 at 11:37 -0400, david brochu jr wrote: I am trying to create a GUI that will display a new window with information about my program when the user clicks on the info button (a green i bitmap). So far all I can get my program to do is show the new window (using Toplevel() ) when the program loads, not when the user presses the information bitmap. I think it has something to do with my command for the information button. Anyone have any ideas or have a GOOD resource that they could point me to? Indeed the problem is to do with your command for the information button. Keeping it in your coding style, change it to: self.info_bttn[command] = self.info Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: beginner: using parameter in functions
On Wed, 2006-05-31 at 23:24 +, 3rdshiftcoder wrote:
hi-
i am having trouble using parameter values in my function and to be honest a
little trouble with
member variables. i am trying to pass in the argument 'd' representing
delete.
what the code will do is if it is 'd' it will make a delete query template
string.
if it is an 'i' then insert query etc.
this is the results of my attempt to print the contents of the parameter
values.
__main__.getQryStr instance at 0x01151D50 ('d',) me mad
(and on a side note if i dont include the *args i get an invalid number of
parameters supplied message.)
why is it returning the value in this format ('d',) ?
i cant get x == d
i guess that value 'd' is stored in a tuple and i'd like to get it out of
there.
so basically the function returns nope as it stands
python is sure different from other languages i have used.
thanks for any help,
jim
Try, the following:
class getQryStr:
def __init__(self,op):
print op
self.x = 'd'
def returnStr(self, *args):
print '%s %s me mad' % (self.x,args)
if self.x == 'd':
s = Template(delete from columndef where tblid = $tblid and
colname = $colname)
else:
return 'nope' #this else is just for illustration and
testing
d = dict(tblid=t.tblid.getText(), colname=t.colName.getText())
print s.substitute(d)
return s
Regards,
John
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Re: TIming
Tue, 2006-05-30 at 00:23 -0500, WIdgeteye wrote: On Tue, 30 May 2006 04:34:03 +, Tim Roberts wrote: WIdgeteye [EMAIL PROTECTED] wrote: HI, I am trying to write a little program that will run a program on scedule. I am having trouble understanding the datetime, time, sched modules. What I would like is something like this: If datetime = 06-13-2006:18:00:00 Then run this program I am not sure how to enter a future date in this equation using any of the modules mentioned above. I have figured out how to get the date and time from the modules above but not the future and then compare the two. What operating system are you using? Both Linux and Windows have commands that can do this for you. It's more efficient to use existing operating system services than to invent your own. Also, remember to take into account the possibility that your program might not check the time at the exact second. In your example, you need to be prepared to start your app if the time is just PAST 6 PM on June 13. I am using Linux and could use cron. But I want to be able to schedule and record television shows on her. And yeah I know about freevo but it's way to complicated than it needs to be. So back to the question: How can I get a 9 position tuple from the time functions in Python based on a future date. Tim Roberts is right. As you are on linux, I suggest you investigate the at command - very user friendly and not at all complicated. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Personally, I don't think it matters whether you use tabs or spaces for code indentation. As long as you are consistent and do not mix the two. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Image open problem
On Thu, 2006-04-20 at 10:29 +1000, John Machin wrote: On 20/04/2006 6:55 AM, Aleksandar Cikota wrote: Hi all, I have a problem with openning of an image. Here is the Code: from Tkinter import * from PIL import Image, ImageTk Change from PIL import Image, ImageTk to import PIL and change all your corresponding Image calls to PIL.Image and all your ImageTk calls to PIL.ImageTk. If that works, then something else is mangling Image. Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to create a tear off menu in TKinter. Help Needed
On Thu, 2006-04-06 at 12:27 -0700, ishtar2020 wrote: Hi everybody I'd appreciate some help on creating a tear off menu with TkInter. I've been reading some documentation but still no luck. Please don't get confused: when I mean tear off menu I don't mean a drop-down or a pop-up menu, but those options which yield to another batch of sub-options when scrolled over, (as for example, the File-New option from internet explorer). I'm sure TkInter supports those widgets because the IDLE editor is built on it and it's got some tear off options like File-Recent Files. Thank you all in advance Are you sure you don't mean a cascading menu ? A tearoff menu gives the user the ability to tear off the menu into a new top level window. The following example illustrates the difference: from Tkinter import * r = Tk() m = Menu(r) # Create a cascading Edit menu editmenu = Menu(m, tearoff=0) editmenu.add_command(label='copy') editmenu.add_command(label='cut') editmenu.add_command(label='paste') # Create a sub menu of the edit menu and use tearoff option testmenu = Menu(editmenu, tearoff=1) testmenu.add_command(label='option1') testmenu.add_command(label='option2') # add the sub menu to the editmenu editmenu.add_cascade(label='test', menu=testmenu) # Add the edit menu to the menu bar m.add_cascade(label='Edit', menu=editmenu) # Display the menu r.config(menu=m) r.mainloop() John McMonagle -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: binding - python
On Thu, 2006-04-06 at 16:39 -0700, beta wrote:
Hi John,
It works! thank you vey much.
I have another question. I would very appreciated if you have any clue.
I want the ball STOP whenever mouse is clicked anywhere, then ball KEEP
MOVING when next mouse click is applied. Thanks.
I do have a clue. Simply bind a mouse click to the entire canvas widget
rather than the canvas item.
Add the following line after you create the canvas widget:
self.draw.bind('Button-1', self.toggleBallMotion)
where toggleBallMotion stops the ball movement if it is moving and
starts the movement if it is stopped. It is a function of the form:
def toggleBallMotion(self, event):
if self.speed.get() != 0:
self.oldspeed = self.speed.get()
self.speed.set(0)
else:
self.speed.set(self.oldspeed)
You will also need to initialise the self.oldspeed variable when you
first create the Scale widget.
John McMonagle
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Re: Mouse event - binding
On Wed, 2006-04-05 at 09:21 -0700, beta wrote: Dear John, Thanks for your help. I don't know how to bind the ball only into a program. Would you mind help me on this? I added the changeColour function, here is a complete program. ...SNIP code... Add the following code after you draw the ball item for the first time: self.draw.tag_bind(self.ball, 'Button-1', changeColour) -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Mouse event - binding
On Wed, 2006-04-05 at 16:04 -0700, beta wrote: Hi John, It don't work! I did what you told me, here is theBall function def theBall(self): self.ball = self.draw.create_oval(0i, 0i, 0.20i, 0.20i, fill=red) self.draw.tag_bind(self.ball, 'Button-1', changeColour) Sorry, that should read: self.draw.tag_bind(self.ball, 'Button-1', self.changeColour) -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Mouse event - binding
On Wed, 2006-04-05 at 16:04 -0700, beta wrote: Hi John, It don't work! I did what you told me, here is theBall function def theBall(self): self.ball = self.draw.create_oval(0i, 0i, 0.20i, 0.20i, fill=red) self.draw.tag_bind(self.ball, 'Button-1', changeColour) Sorry, that should read: self.draw.tag_bind(self.ball, 'Button-1', self.changeColour) -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: binding - python
Quoc, the following code, verbatim, works for me: from Tkinter import * class Pong(Frame): def createWidgets(self): self.QUIT = Button(self, text='QUIT', foreground='red', command=self.quit) self.QUIT.pack(side=LEFT, fill=BOTH) ## The playing field self.draw = Canvas(self, width=5i, height=5i) ## The speed control for the ball self.speed = Scale(self, orient=HORIZONTAL, label=ball speed, from_=-100, to=100) self.speed.pack(side=BOTTOM, fill=X) # The ball self.ball = self.draw.create_oval(0i, 0i, 0.20i,0.20i, fill=red) self.draw.tag_bind(self.ball, 'Button-1', self.changeColour) self.x = 0.05 self.y = 0.05 self.velocity_x = 0.3 self.velocity_y = 0.5 self.draw.pack(side=LEFT) def changeColour(self, event): x = self.draw.canvasx(event.x) y = self.draw.canvasy(event.y) item = self.draw.find_closest(x,y) currentColour = self.draw.itemcget(item, 'fill') if currentColour == 'red': self.draw.itemconfigure(item, fill='blue') else: self.draw.itemconfigure(item, fill='red') def moveBall(self, *args): if (self.x 5.0) or (self.x 0.0): self.velocity_x = -1.0 * self.velocity_x if (self.y 5.0) or (self.y 0.0): self.velocity_y = -1.0 * self.velocity_y deltax = (self.velocity_x * self.speed.get() / 100.0) deltay = (self.velocity_y * self.speed.get() / 100.0) self.x = self.x + deltax self.y = self.y + deltay self.draw.move(self.ball, %ri % deltax, %ri % deltay) self.after(10, self.moveBall) def __init__(self, master=None): Frame.__init__(self, master) Pack.config(self) self.createWidgets() self.after(10, self.moveBall) game = Pong() game.mainloop() Cut and paste it into a file and try it out. Make sure you check for line breaks on long lines. John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Mouse event - binding
On Tue, 2006-04-04 at 14:46 -0700, beta wrote: Hello All, I am new with Python, your help would be very appreciated. I have a simple pinpong applicaiton. I would like make a ball's color change when mouse is clicked on it. Here is my sample code: from Tkinter import * import string class Pong(Frame): def createWidgets(self): self.QUIT = Button(self, text='QUIT', foreground='red', command=self.quit) self.QUIT.pack(side=LEFT, fill=BOTH) ## The playing field self.draw = Canvas(self, width=5i, height=5i) ## The speed control for the ball self.speed = Scale(self, orient=HORIZONTAL, label=ball speed, from_=-100, to=100) self.speed.pack(side=BOTTOM, fill=X) # The ball #self.ball = self.draw.create_oval(0i, 0i, 0.10i, 0.10i, # fill=red) self.theBall() self.x = 0.05 self.y = 0.05 self.velocity_x = 0.3 self.velocity_y = 0.5 self.draw.pack(side=LEFT) def theBall(self): self.ball = self.draw.create_oval(0i, 0i, 0.20i, 0.20i, fill=red) def moveBall(self, *args): if (self.x 5.0) or (self.x 0.0): self.velocity_x = -1.0 * self.velocity_x if (self.y 5.0) or (self.y 0.0): self.velocity_y = -1.0 * self.velocity_y deltax = (self.velocity_x * self.speed.get() / 100.0) deltay = (self.velocity_y * self.speed.get() / 100.0) self.x = self.x + deltax self.y = self.y + deltay self.draw.move(self.ball, %ri % deltax, %ri % deltay) self.after(10, self.moveBall) def __init__(self, master=None): Frame.__init__(self, master) Pack.config(self) self.createWidgets() self.after(10, self.moveBall) game = Pong() game.mainloop() Thanks, -- You need to bind a button-1 event to the ball tag. After you initially create the ball item: self.draw.tag_bind(self.ball, 'Button-1', changeColour) where changeColour is a function like so: def changeColour(self, event): x = self.draw.canvasx(event.x) y = self.draw.canvasy(event.y) item = self.draw.find_closest(x,y) currentColour = self.draw.itemcget(item, 'fill') if currentColour == 'red': self.draw.itemconfigure(item, fill='blue') else: self.draw.itemconfigure(item, fill='red') This will toggle the ball colour between red and blue. HTH, John McMonagle -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter canvas
On Tue, 2006-04-04 at 14:47 -0700, fxe wrote:
Hi,
I am using tkinter and I have a canvas that with several rectangles drawn
on it. The rectangles need to have bindings to move and resize them. No
problem here, but I also need to display a grid on the same canvas, for
which I am using create_line. My problem is I do not want the grid lines to
be able to move and resize .
Is this doable or any suggestions on an alternative.Maybe another way to
display my grid on top of the canvas?
When you create your canvas items use the tags option to differentiate
items you wish to group together.
For example,
canvas.create_line(x1,y1,x2,y2,fill='#00',tags='grid')
canvas.create_rectangle(x1,y1,x2,y2,fill='#FF',outline='#FF',tags='rect')
You can ensure that the grid lines are always displayed below the
rectangles by using the tag_lower method:
canvas.tag_lower('grid', 'rect')
You can bind events to the named tags rather than the canvas as a whole:
canvas.tag_bind('rect', 'Button-1', startMove)
canvas.tag_bind('rect', 'Button1-Motion', moveRect)
canvas.tag_bind('rect', 'Button1-ButtonRelease', finishMove)
Now when you click on a canvas item with a 'grid' tag nothing will
happen, but if you click on a canvas item with a 'rect' tag you will
invoke the appropriate function.
HTH,
John McMonagle
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Re: tkinter canvas
On Tue, 2006-04-04 at 16:42 -0700, fxe wrote:
Hi John , thanks a million for the info.Looking at your solution I am sure
this would work. After struggling with this for the past few hours I found
another way just before reading your post. Its as simple as :
canvas.create_line(x1,y1,x2,y2,fill='#00',state=DISABLED)
Tom,
below is some quick and dirty code illustrating the tag_bind concept
similar to your case:
from Tkinter import *
def startMove(event):
global startx, starty, item
widget = event.widget
startx, starty = widget.winfo_pointerxy()
x = widget.canvasx(event.x)
y = widget.canvasy(event.y)
item = widget.find_closest(x,y)
def movingRect(event):
global startx, starty, item
widget = event.widget
newx,newy = widget.winfo_pointerxy()
diffx = newx - startx
diffy = newy - starty
widget.move(item, diffx, diffy)
widget.update_idletasks()
startx = newx
starty = newy
r = Tk()
c = Canvas(r, width=500, height=500)
c.pack(fill=BOTH, expand=YES)
# Draw grid lines every 50 pixels
for x in range (0,500,50):
c.create_line(x,0,x,500,tags='grid')
for y in range(0,500,50):
c.create_line(0,y,500,y,tags='grid')
# Draw some random rectangles on top
c.create_rectangle(124,124,182,190,fill='#FF',outline='#FF',tags='rect')
c.create_rectangle(90,50,100,300,fill='#FF',outline='#FF',tags='rect')
c.create_rectangle(320,210,415,290,fill='#00FF00',outline='#00FF00',tags='rect')
c.create_rectangle(400,50,450,100,fill='#00',outline='#00',tags='rect')
# bind rect tags to move functions
c.tag_bind('rect', 'Button-1', startMove)
c.tag_bind('rect', 'Button1-Motion', movingRect)
r.mainloop()
Cheers,
John McMonagle
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Multiplying all the values in a dictionary
Say I have a dictionary like below:
d = {(100,500):[5,5], (100,501):[6,6], (100,502):[7,7]}
Say I want to multiply all the values of the dictionary by 2:
for key in d.keys():
d[key] = map(lambda x: x*2, d.get(key))
Is there a better/faster/cleaner way to achieve this ?
Thanks,
John
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Re: Help with a reverse dictionary lookup
On Thu, 2006-03-09 at 15:51 -0800, rh0dium wrote:
Hi all,
I have a dict which looks like this..
dict={'130nm': {'umc': ['1p6m_1.2-3.3_fsg_ms']},
'180nm': {'chartered': ['2p6m_1.8-3.3_sal_ms'], 'tsmc':
['1p6m_1.8-3.3_sal_log', '1p6m_1.8-3.3_sal_ms']},
'250nm': {'umc': ['2p6m_1.8-3.3_sal_ms'], 'tsmc':
['1p6m_2.2-3.5_sal_log', '1p6m_1.8-3.3_sal_ms']}
}
For clarification:
130nm,180nm,250nm refer to Nodes
tsmc,chartered,umc refer to Foundries
1p6m..blah, 2p6m..blah refer to Process
I want a function which can do this:
nodes = getNodes()
should return a list [130nm,180nm,250nm]
I'm not going to write your function for you but the following should
help you get started.
dict.keys() -- returns a list of the keys in your dictionary
[130nm,180nm,250nm]
nodes = getNodes(Foundry=umc)
should return a list [130nm,250nm]
Here you want to check if the key in the child dictionary matches some
text:
Eg:
Foundry = 'umc'
FoundryList = []
for key in dict.keys:
val = dict.get(key)
if Foundry in val.keys():
FoundryList.append(key)
print FoundryList
[130nm,250nm]
nodes = getNodes(Process=2p6m_1.8-3.3_sal_ms)
should return a list [180nm,250nm]
Same concept here:
Process = ['2p6m_1.8-3.3_sal_ms']
ProcessList = []
for key in dict.keys():
val = dict.get(key)
if Process in val.values():
ProcessList.append(key)
print ProcessList
[180nm,250nm]
So key concepts you need are:
- Get a list of keys from the dictionary -- dict.keys()
- Get the value matching a key -- dict.get(key)
- Get a list of values from the dictionary -- dict.values()
This should be enough to get you going.
nodes = getNodes(Foundry=umc, Process=2p6m_1.8-3.3_sal_ms)
should return a list [250nm]
nodes = getNodes(Foundry=foo, Process=2p6m_1.8-3.3_sal_ms)
should return None
Obviously I want to extend this to Each area ( i.e., getFoundry(),
getProcess() ) but I can do that. I just don't know how to easily do
this reverse kind of look up? Can someone help me on this?
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Re: Password entering system
On Thu, 2006-03-09 at 19:42 -0800, Tuvas wrote: Thanks, that's exactly what I wanted! -- http://mail.python.org/mailman/listinfo/python-list You may also want to check out Pmw (Python Megawidgets) Pmw has a nifty Prompt Dialog. See http://pmw.sourceforge.net/doc/PromptDialog.html John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tix, spinboxes, and 1=5
On Wed, 2006-02-22 at 18:37 -0800, [EMAIL PROTECTED] wrote: This odd bug has been annoying me for several days now. I finally got round to making this, frankly hilarious, testcase: from Tix import * def sayfive(num): if num5: print num, 5 else: print num,= 5 sayfive(4) sayfive(6) rootwnd=Tk() Control(rootwnd,command=sayfive).pack() rootwnd.mainloop() So, our program starts, the first two lines executed write 46 6=5 as expected. Now the user changes the value in the spinner, and we get output like 1=5. What magic is Tix pulling, and more importantly how the hell do I stop it? This should fix your problem: from Tix import * def sayfive(num): num = int(num) if num5: print num, 5 else: print num,= 5 sayfive(4) sayfive(6) rootwnd=Tk() Control(rootwnd,command=sayfive).pack() rootwnd.mainloop() The entry in the spinbox is a string. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
On Tue, 2006-02-21 at 16:14 -0800, DannyB wrote: I'm just learning Python. I've created a simple coin flipper program - here is the code: [source] #Coin flipper import random heads = 0 tails = 0 counter = 0 coin = random.randrange(2) while (counter 100): if (coin == 0): heads += 1 counter += 1 else: tails += 1 counter += 1 coin = random.randrange(2) print \nThe coin landed on heads, heads, times. print \nThe coin landed on tails, tails, times. [/source] I'm sure the [source] tags don't work - I through them in there anyway. The program runs - however - it will give me 100 heads OR 100 tails. Can someone spot the logic error? Yes. Put coin = random.randrange(2) inside the while loop. import random heads = 0 tails = 0 counter = 0 coin = random.randrange(2) while (counter 100): if (coin == 0): heads += 1 counter += 1 else: tails += 1 counter += 1 coin = random.randrange(2) print \nThe coin landed on heads, heads, times. print \nThe coin landed on tails, tails, times. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Natural Language Date Processing.
On Thu, 2006-02-09 at 09:47 +0100, Michael Amrhein wrote: Andrew Gwozdziewycz schrieb: You may take a look at http://labix.org/python-dateutil Have fun Michael Looks like it does a good job parsing dates, but doesn't seem to do english dates. I found a javascript implementation of a few functions that will probably be relatively easy to port to python. Whether or not it'll perform well is another story... Thanks for the help. -- Andrew Gwozdziewycz [EMAIL PROTECTED] http://ihadagreatview.org http://plasticandroid.org from dateutil.parser import parse parse(April 16th, 2003) datetime.datetime(2003, 4, 16, 0, 0) parse(4/16/2003) datetime.datetime(2003, 4, 16, 0, 0) Aren't these english dates? I suspect the OP is referring to english dates as non-US format - to follow the international convention (DD/MM/). You can use the dayfirst parameter to the parse function to always assume international date format: US Format: parse(10/12/2004) datetime.datetime(2004, 10, 12, 0, 0) International format: parse(10/12/2004, dayfirst=True) datetime.datetime(2004, 12, 10, 0, 0) John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Determining an operating system's default browser
Is there a python module which can determine an operating system's default web browser application. I would like to use it in the following context: I have a GUI application where all the documentation is written as html pages. I wish to have these html help pages open in the default browser when selected from the application's Help menu If python can determine the path to the default browser, I can then just spawn it. Regards, John McMonagle -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Determining an operating system's default browser
On Thu, 2006-02-09 at 17:53 -0600, Larry Bates wrote:
You don't have to determine it. Just os.startfile('page1.html')
and let the OS figure it out.
Works great for Windows - not available on Unix though.
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Re: nDimensional sparse histogram in python.
On Wed, 2006-02-01 at 19:06 -0800, KraftDiner wrote:
Cool.
Ok so my histogram class had two methods 1) To increment a point and 2)
to get the point.
def class histo:
def __init__(self):
histo = {}
def update(point):
'''searches the dictionary for point and if it exists increment the
value.
if it doesn't exist set the value to 1'''
def get(point):
return self.histo[point]
I'm not sure how to code up the update routine...
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def update(point);
if histo.get(point) != None:
histo[point] = histo[point] + 1
Regards,
John
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Re: how to parse structured text file?
I have a file which contains data in the format shown in the sample
bellow.
How can I parse it to get following:
(14,trigger,guard,do_action,15)
Thanks a lot for your postings
Petr Jakes
type:
4
bgrColor:
255 255 255
fgrColor:
0 0 0
objId:
16
Num.Pts:
2
177 104
350 134
objStartId:
14
objEndId:
15
eventName:
trigger
eventCond:
guard
eventAction:
do_action
Create a dictionary mapping the properties to their values, then print
out the ones you require:
fid = open('xxx', 'r')
lines = fid.readlines()
fid.close()
i = 0
items = {}
for line in lines:
line = line.strip()
if line[-1] == ':':
line = line.split(':')[0]
items[line] = lines[i+1].strip()
i = i + 1
outString = '(' + items.get('objStartId') + ',' +
items.get('eventName') + ',' + items.get('eventCond') + ',' +
items.get('eventAction') + ',' + items.get('objEndId') + ')\n'
print outString
This code yields the following output:
(14,trigger,guard,do_action,15)
Regards,
John McMonagle
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