I use Python 2.3 to run the following code:
a=[[1,2],[4,8],[0,3]]
a.sort()
a
[[0, 3], [1, 2], [4, 8]]
I wonder whether the sort function automatically consider the first
element in the list of list as the sorting criteria or it just happens
to be?
Thanks!
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I used the following method to remove duplicate items in a list and
got confused by the error.
a
[[1, 2], [1, 2], [2, 3]]
noDups=[ u for u in a if u not in locals()['_[1]'] ]
Traceback (most recent call last):
File interactive input, line 1, in ?
TypeError: iterable argument required
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I have a list like [[1,4],[3,9],[2,5],[3,2]]. How can I sort the list
based on the second value in the item?
That is,
I want the list to be:
[[3,2],[1,4],[2,5],[3,9]]
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On 11/21/05, Daniel Schüle [EMAIL PROTECTED] wrote:
Shi Mu wrote:
I have a list like [[1,4],[3,9],[2,5],[3,2]]. How can I sort the list
based on the second value in the item?
That is,
I want the list to be:
[[3,2],[1,4],[2,5],[3,9]]
lst = [[1,4],[3,9],[2,5],[3,2]]
lst
[[1, 4
I run the following code and got wrong message, but I still want to
make [1,2],[4,3] and [6,9]
to be keys of the dictionary or change the style a little bit. How to do that?
Thanks!
p=[[1,2],[4,3],[6,9]]
n=dict([(x,[]) for x in p])
Traceback (most recent call last):
File interactive input,
I have have the following code:
a=[3,5,8,0]
b={}
How I can i assign each item in a as the key in the dictionary b
simultaneously?
that is,
b={3:[],5:[],8:[],0:[]}
Thanks!
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On 20 Nov 2005 02:59:30 -0800, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
b = dict([(x,dict()) for x in a])
Shi Mu wrote:
I have have the following code:
a=[3,5,8,0]
b={}
How I can i assign each item in a as the key in the dictionary b
simultaneously?
that is,
b={3:[],5:[],8
Why I got a black polygon in the following code?
How can I make it no-color filled?
Thanks!
import Tkinter
c = Tkinter.Canvas(width=220, height=220)
c.pack()
c.create_polygon(60,60,100,60,100,100,60,120)
c.mainloop()
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On 11/20/05, Peter Otten [EMAIL PROTECTED] wrote:
przemek drochomirecki wrote:
Uzytkownik Shi Mu [EMAIL PROTECTED] napisal w wiadomosci
news:[EMAIL PROTECTED]
I have have the following code:
a=[3,5,8,0]
b={}
How I can i assign each item in a as the key in the dictionary b
On 11/20/05, Jan Voges [EMAIL PROTECTED] wrote:
Hi!
Am Sun, 20 Nov 2005 03:55:21 -0800 schrieb Shi Mu:
Why I got a black polygon in the following code?
How can I make it no-color filled?
Use create_line instead:
c.create_line(60,60,100,60,100,100,60,120,60,60)
Jan
If so, what
On 11/20/05, przemek drochomirecki [EMAIL PROTECTED] wrote:
Uzytkownik Peter Otten [EMAIL PROTECTED] napisal w wiadomosci
news:[EMAIL PROTECTED]
Shi Mu wrote:
how to do with it?
Use Ben Finney's, not Przemek's approach if the values are mutables that
you
plan to modify. If that's
Got confused by the following code:
a
[6, 3, 1]
b
[4, 3, 1]
c
{1: [[6, 3, 1], [4, 3, 1]], 2: [[6, 3, 1]]}
c[2].append(b.sort())
c
{1: [[6, 3, 1], [1, 3, 4]], 2: [[6, 3, 1], None]}
#why c can not append the sorted b??
b.sort()
b
[1, 3, 4]
--
what does the following code mean? It is said to be used in the
calculation of the overlaid area size between two polygons.
map(lambda x:b.setdefault(x,[]),a)
Thanks!
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d is a dictionary.
d
{0: [[0, 1], [0, 2]], 1: [[0, 1], [1, 2], [1, 3]], 2: [[0, 2], [1, 2],
[2, 3]], 3: [[1, 3], [2, 3]]}
for the value under each key, if the possible connection is in the
dictionary, for example, under key 0. 1 and 2 were found to have a
pair in some other places so get [0,1,2]
On 11/20/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Ben Bush wrote:
How to draw a dash line in the Tkinter?
use the dash option. e.g.
canvas.create_line(xy, fill=red, dash=(2, 4))
canvas.create_line(xy, fill=red, dash=(6, 5, 2, 4))
(the tuple contains a number of line lengths;
How to run a function to make [1,2,4] become [[1,2],1,4],[2,4]]?
Thanks!
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I have a code here. I understand i can not draw lines without the
global definition of lastX and lastY. But still confused by its use.
when should we use global definition?
from Tkinter import *
root = Tk()
c = Canvas(root, bg='#0e2e0e', height=500, width=1000)
frame = c
lastX=
lastY=
def
On 11/15/05, Brian van den Broek [EMAIL PROTECTED] wrote:
Shi Mu said unto the world upon 2005-11-15 01:30:
Hey Ben,
first, as expected, the other two answers you received are better. :-)
Sets are much better optimized for things like membership testing than
are lists. I'm not competent
On 11/15/05, Simon Brunning [EMAIL PROTECTED] wrote:
On 15/11/05, Shi Mu [EMAIL PROTECTED] wrote:
it does not work.
len(set(lisA).intersection(set(lisB))) == 2
Traceback (most recent call last):
File interactive input, line 1, in ?
NameError: name 'set' is not defined
'set
Hey Ben,
first, as expected, the other two answers you received are better. :-)
Sets are much better optimized for things like membership testing than
are lists. I'm not competent to explain why; indeed, I keep
overlooking them myself :-(
Unfortunately, the indents got screwed up along
very hard for me to understand the difference between
try...except and try...finally
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very hard for me to understand the difference between
try...except and try...finally
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i got confused by the use of array and arange.
arange get array and range get list, why we need the two different types?
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On 11/12/05, Robert Kern [EMAIL PROTECTED] wrote:
Shi Mu wrote:
i got confused by the use of array and arange.
arange get array and range get list, why we need the two different types?
When you're asking questions about a third-party module, it's a good
idea to mention the module
On 11/12/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
I tried again and got the follwoing message:
*** cannot find Tcl/Tk headers and library files
change the TCL_ROOT variable in the setup.py file
but i have already installed TCL under python23
hmm. I still think
On 11/12/05, Robert Kern [EMAIL PROTECTED] wrote:
Shi Mu wrote:
i got confused by the use of array and arange.
arange get array and range get list, why we need the two different types?
When you're asking questions about a third-party module, it's a good
idea to mention the module
):
dirs.append(x)
return dirs
Fredrik Lundh wrote:
Shi Mu wrote:
print buildList() gets lots of stuffs from my temp directory(there do
exist lots of files).
But why print x' has nothing?
C:\more script.py
import os
def buildList( directory='c:\TEMP' ):
dirs
] wrote:
If you mean trigonometrics calculus
give a try at
http://online.effbot.org/2004_09_01_archive.htm#tkinter-complex
and download too WCK http://effbot.org/zone/tkinter-index.htm
there is a demo on Lissajou
Regards
Shi Mu a écrit :
is there any sample code to triangulation? many thanks
On 11/11/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
I tried to install WCK(Widget Construction Kit (WCK)):
C:\Python23python tkinter3000-1.0-20031212\setup.py install
Traceback (most recent call last):
File tkinter3000-1.0-20031212\setup.py, line 23
On 11 Nov 2005 22:00:04 GMT, Michael Konrad [EMAIL PROTECTED] wrote:
Richard Townsend [EMAIL PROTECTED] wrote:
On 11 Nov 2005 21:20:33 GMT, SU News Server wrote:
Try passing the full pathname of each item to os.path.isdir()
You can create the pathname using os.path.join(directory, x)
On 11/11/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
I tried this and no error reported but nothing appear on the console, why?
import os
def buildList( directory='c:\TEMP' ):
dirs = [ ]
listing = os.listdir(directory)
for x in listing:
x
On 11/11/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
I tried to install WCK(Widget Construction Kit (WCK)):
C:\Python23python tkinter3000-1.0-20031212\setup.py install
Traceback (most recent call last):
File tkinter3000-1.0-20031212\setup.py, line 23
On 11/11/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
but i am curious why the line of print x does not show
anything.
because your c:\temp directory is empty ?
/F
print buildList() gets lots of stuffs from my temp directory(there do
exist lots of files).
But why print x' has
got confused by x, y coordinates in Tkinter canvas.
from left to right, does X increase?
from top to bottom, does y increase?
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On 11 Nov 2005 16:06:37 -0800, Martin Miller
[EMAIL PROTECTED] wrote:
Shi Mu wrote:
On 11/11/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
1. pass in the full path to the executable:
cd tkinter3000-1.0-20031212
c:\python23\python setup.py install
...
still confused by th
?
Or even triangulation of currency from EU currency to EU currency
via the euro?
See:
http://www.sysmod.com/eurofaq.htm#Triangulation
Alan G.
This Shi Mu character is a little frustrating. They won't even respond
to peoples polite responses for clarification
Hit'n'run help
is there any sample code to triangulation? many thanks!
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Delaunay triangulations
On 11/9/05, Robert Kern [EMAIL PROTECTED] wrote:
Shi Mu wrote:
is there any sample code to triangulation? many thanks!
Triangulation of what? Scattered points in a plane? 2D manifolds
embedded in a 3D space?
Delaunay triangulations? Constrained triangulations
why the following code report the error:
Traceback (most recent call last):
File C:\Python23\lib\site-packages\Pythonwin\pywin\framework\scriptutils.py,
line 310, in RunScript
exec codeObject in __main__.__dict__
File C:\Python23\Examples\AppB\text.py, line 24, in ?
text.image_create(END,
yes. I use both cmd and pythonwin to run it. why both of them can not work?
On 11/8/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
why the following code report the error:
Traceback (most recent call last):
File
C:\Python23\lib\site-packages\Pythonwin\pywin\framework
any python module to calculate sin, cos, arctan?
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Is there any sample code to draw parabola using Tkinter?
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I have the following workable code and every time i click on the
canvas, the coordinates are reported.
i wonder how i can draw the lines when i click the canvas using these
coordinates?
from Tkinter import *
root = Tk()
c = Canvas(root, bg='#0e2e0e', height=500, width=1000)
def click(event):
How can I make the main menu come first, and after clicking test/just
try, how are you interface shows.
Thanks a lot!
from Tkinter import *
from Tkinter import _cnfmerge
class Dialog(Widget):
def __init__(self, master=None, cnf={}, **kw):
cnf = _cnfmerge((cnf, kw))
self.widgetName
When I run the following code,
script kept running and I have to force it to stop.
Could you check the code to give suggestions how to improve it?
Thanks a lot!
from Tkinter import *
from Tkinter import _cnfmerge
class Dialog(Widget):
def __init__(self, master=None, cnf={}, **kw):
cnf
I got a sample code and tested it but really can not understand the
use of pickle and dump:
import pickle
f = open(try.txt, w)
pickle.dump(3.14, f)
pickle.dump([1,2,3,4], f)
f.close()
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what does the following code mean?
y = pickle.load(file(cnumber.pickle, r))
also, I can not understand f in pickle.dump(x, f)
On 10/25/05, marduk [EMAIL PROTECTED] wrote:
On Mon, 2005-10-24 at 23:55 -0700, Shi Mu wrote:
I got a sample code and tested it but really can not understand
I can not understand the use of cell and row in the code:
# convert the matrix to a 1D list
matrix = [[13,2,3,4,5],[0,10,6,0,0],[7,0,0,0,9]]
items = [cell for row in matrix for cell in row]
print items
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', 'defenestrate', 'defenestrate', 'cat',
'window', 'defenestrate']
On 10/25/05, Fredrik Lundh [EMAIL PROTECTED] wrote:
Shi Mu wrote:
I can not understand the use of cell and row in the code:
# convert the matrix to a 1D list
matrix = [[13,2,3,4,5],[0,10,6,0,0],[7,0,0,0,9]]
items = [cell
I got confused by the following information from the help for FIND:
find(s, *args)
find(s, sub [,start [,end]]) - in
what does *args mean (especially the '*')?
also, in the sub, why put a comma before start?
what does 'in' mean?
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In the PythonWin's interactive window,
why sometimes I need type the command two times to make it work?
for example, I execute print testList two times to make it work.
Why?
print testList
print testList
['w', 'e', ' ', 'w', 'a', 'n', 't', ' ', 't', 'o', ' ', 'l', 'e', 'a',
'r', 'n', ' ', 'p',
Is there any difference if I remove the '/'
from the following statement?
intMatrix2 = [[1,1,2,4,1,7,1,7,6,9],\
[1,2,5,3,9,1,1,1,9,1],\
[0,0,5,1,1,1,9,7,7,7]]
print intMatrix2
I removed one '\' and it still works.
So what is the use of '\'?
--
what is the differenc ebetween index and find in the module of string?
for both find and index, I got the position of the letter.
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what is the difference between index and find in the module of string?
for both find and index, I got the position of the letter.
On 10/19/05, Shi Mu [EMAIL PROTECTED] wrote:
I have installed Python 2.3 and I type help() and then Keywords.
I get a list of words. And it says that I can enter any
I have installed Python 2.3 and I type help() and then Keywords.
I get a list of words. And it says that I can enter any of the words
to get more help. I enter
and and I get the following error message:
Sorry, topic and keyword documentation is not available because the Python
HTML documentation
I have installed Python 2.3 and I type help() and then Keywords.
I get a list of words. And it says that I can enter any of the words
to get more help. I enter
and and I get the following error message:
Sorry, topic and keyword documentation is not available because the Python
HTML documentation
After I run the following python code, I expect to have the printing such as:
The year is 2005
However, I got something like:
The year is 2005
Fri Oct 14 17:43:31 2005
Fri Oct 14 17:43:31 2005
The year is 2005
What is the reason?
The code follows:
import time
import now
class today(now.now):
it is not a homework, just interested.
On 10 Oct 2005 00:04:23 -0700, gsteff [EMAIL PROTECTED] wrote:
Why do you want to know? This list isn't a tool to get others to do
your homework.
Greg
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is there any course website about teaching python?
for instance, some computer science courses website?
On 10/8/05, Shi Mu [EMAIL PROTECTED] wrote:
is there any Python code for spatial tessellation?
thanks a lot!
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There are four points with coordinates:
2,3;4,9;1,6;3,10.
How to use Python to draw one perpendicular bisector between (2,3) and (4,9);
the other perpendicular bisector between (1,6)和(3,10);
then, makes the output like:
l1 a b c
l2 a b c
(Note: l indicates the perpendicular bisector with equation
is there any Python code for spatial tessellation?
thanks a lot!
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I have three points in a rectangle and i wonder how to use PYTHON to divide the rectangle into three
parts with each point located in the different part.
For instance, Point A
goes to Part I, Point B goes to Part II and Point C goes to Part III.
And the distance between any point within Part I
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