Hello George,
I found the book you're referring to via google (searching for: tony
gaddis starting out with python). The question is this:
3. Write assignment statements that perform the following operations
with the variables a,b and c.
a. Adds 2 to a and assigns the result to b
b. Multipli
d. Subtracts 8 from and assigns the result to a
this should read: "Subtracts 8 from b and assigns the result to a"
Funny how none of the assignments involve a variable c, despite the
question :)
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Maybe this can help you?
http://technogems.blogspot.com/2012/01/capture-colored-console-output-in.html
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Any ideas?
I think you will have more chance for an answer in a more specialized
list, e.g. the enthought-dev mailing list, which is also accessible via
gmane:
http:// dir.gmane.org / gmane.comp.python.enthought.devel
Stefaan.
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Hi, All,
Can anyone send me the link for downloading ArcPY?
I came across it before, but can not find it anymore.
Regards.
David--
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Hi,
Where do I find ArcPy.py?
It seems that the link disappeared.
Regards.
David--
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We are looking for a very simple, generic Python module to
provide a secure web service. Ideally,
it can be put onto the computer and make it available via IIS.
Off we go.
Your help will be gratefully received.
Regards.
David--
http://mail.python.org/mailman/listinfo/python-list
I am looking very simple and straightforward open source Python REST and SOAP
demo modules.
I really need things which are very simple and convincing. I want to
demonstrate these to other people.
I want to promote you guys' interest. I find asp and others frustrating and
occupy too much in
Dear All,
I am looking for proven Python code for Line Simplication such as
Douglas-Peucker.
Regards.
David
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Can anyone tell me how to call and exectute C code in Python?
Regards.
David
From: "python-list-requ...@python.org"
To: python-list@python.org
Sent: Friday, 11 May 2012, 5:35
Subject: Python-list Digest, Vol 104, Issue 57
- Forwarded Message -
Sen
sands of intervals covering ranges
of days to weeks would be doable. If instead you're talking about millions of
ranges covering years to decades I'd start elsewhere.
Emile
On Sun, May 13, 2012 at 11:25 PM, David Shi wrote:
> Can anyone tell me how to call and exectute C code in Pyth
Dear All,
I am looking for Python script for Vector Map simplification, preserving shape
and topology.
Please get in touch with davidg...@yahoo.co.uk
Regards.
David
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Can any one clarify what "while stack:" mean?
Regards,
David
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Hello,
Where is the latest step by step guide to use Jython to compile Python into
Java?
I found that it was very confusing by reading not updated text.
Please help.
Regards.
David
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software or instructions.
Please provide assistance, by providing the tested software and instructions.
Regards.
David
From: "Narayanaswamy, Mohan"
To: David Shi
Cc: python-list@python.org
Sent: Monday, 4 June 2012, 15:56
Subject: RE: Where is
: "Narayanaswamy, Mohan"
To: David Shi
Cc: python-list@python.org
Sent: Monday, 4 June 2012, 16:38
Subject: RE: Where is the latest step by step guide to use Jython to
compilePython into Java?
David,
Thanks for the link, here that compilation steps won’t produce java code, but
it co
Dear Python community friends,
I wonder whether there is such a Python implementation available.
Alan Saalfeld et al's algorithm and source codes.
http://books.google.ie/books/about/A_Modified_Douglas_Peucker_Simplificatio.html?id=gbQjywAACAAJ&redir_esc=y
In Zhiyuan Zhao and Alan Saafeld's pap
Hi, folks.
Where is the lastest step by step guide to compile Python into an executable?
Regards.
David
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What is the robust way to use Python to read in an XML and turn it into a
JSON file?
JSON dictionary is actually a tree. It is much easier to manage the
tree-structured data.
Regards,
David
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There appear to be a few options for this.
Has anyone tested and got experience with automated data testing,
validation and reporting?
Can anyone enlighten me?
Regards,
David
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Dear All,
I am trying to look for a definitive guide for Regex in Python.
Can anyone help?
Regards,
David
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?
Regards,
David
On Thu, 30 Sept 2021 at 22:02, Barry Scott wrote:
>
>
> > On 30 Sep 2021, at 19:35, dn via Python-list
> wrote:
> >
> > On 01/10/2021 06.16, Barry Scott wrote:
> >>
> >>
> >>> On 30 Sep 2021, at 12:29, Shaozhong SHI
>
I tried the following code:
import pyodbc
conn = pyodbc.connect(r'Driver={Microsoft Access Driver (*.mdb,
*.accdb)};DBQ=D:\my.accdb;')
cursor = conn.cursor()
cursor.execute('select * from table_name')
for row in cursor.fetchall():
print (row)
But I could not connect to .accdb.
What is the
I read a txt file into Pandas Dataframe, and found a lot of nulls in a
column.
Then, I used SQLAlchemy and psycopg2. I created engine.
I loaded data onto PostgreSQL.
Strange thing happened.
The column has no null at all.
Does it mean that the data has been modified somewhere along the line?
Hello,
Is anyone familiar with alternatives to Jupyter Notebook.
My Jupyter notebook becomes unresponsive in browsers.
Are there alternatives to read, edit and run Jupyter Notebook?
Regards,
David
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How to output the result of df.count() to a Pandas dataframe with column
names?
Regards,
David
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Hello,
The result of df.count() appears to be a series object. How to store the
result of df.count() as a new dataframe in Pandas?
That is data anyhow.
Regards,
David
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Python script works well, but seems to stop running at a certain point when
handling very large dataset.
Can anyone shed light on this?
Regards, David
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On Saturday, 30 October 2021, Dieter Maurer wrote:
> Shaozhong SHI wrote at 2021-10-29 23:42 +0100:
> >Python script works well, but seems to stop running at a certain point
> when
> >handling very large dataset.
> >
> >Can anyone shed light on this?
>
> Som
I defined a function and apply it to a column in Pandas. But it does not
return correct values.
I am trying to test which url in a column full of url to see which one can
be connected to or not
def connect(url):
try:
urllib.request.urlopen(url)
return True
except:
On Sunday, 31 October 2021, Albert-Jan Roskam
wrote:
>
>
> > df['URL'] = df.apply(lambda x: connect(df['URL']), axis=1)
>
>
> I think you need axis=0. Or use the Series, df['URL'] =
> df.URL.apply(connect)
>
Any details?
I will try and let you know. Regards, David
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On Sunday, 31 October 2021, MRAB wrote:
> On 2021-10-31 17:25, Shaozhong SHI wrote:
>
>> I defined a function and apply it to a column in Pandas. But it does not
>> return correct values.
>>
>> I am trying to test which url in a column full of url to see which one
On Sun, 31 Oct 2021 at 19:28, MRAB wrote:
> On 2021-10-31 18:48, Shaozhong SHI wrote:
> >
> > On Sunday, 31 October 2021, MRAB wrote:
> >
> > On 2021-10-31 17:25, Shaozhong SHI wrote:
> >
> > I defined a function and apply it to a column
On Sun, 31 Oct 2021 at 18:42, Shaozhong SHI wrote:
>
>
> On Sunday, 31 October 2021, Albert-Jan Roskam
> wrote:
>
>>
>>
>> > df['URL'] = df.apply(lambda x: connect(df['URL']), axis=1)
>>
>>
>> I think you need ax
How to configure to improve Python performance in a system like the
following:
Windows 10
System
Processor Intel(R) Core(TM) i7-9700 CPU @3.60GHz, 3.60 GHz
Installed memory (RAM) 32.0 GB (31.8 GB usable)
System type: 64-bit Operating System, x64-based processor
I found that the Python script wa
On Tue, 2 Nov 2021 at 00:09, MRAB wrote:
> On 2021-11-01 23:02, Shaozhong SHI wrote:
> > How to configure to improve Python performance in a system like the
> > following:
> >
> > Windows 10
> >
> > System
> >
> > Processor Intel(R) Core(TM)
On Tue, 2 Nov 2021 at 00:20, Shaozhong SHI wrote:
>
>
> On Tue, 2 Nov 2021 at 00:09, MRAB wrote:
>
>> On 2021-11-01 23:02, Shaozhong SHI wrote:
>> > How to configure to improve Python performance in a system like the
>> > following:
>> >
>>
I am trying to install geopandas.
I navigated to c:\programData|Anaconda3\Scripts>
and typed in 'pip install geopandas'.
It ran but failed at fiona.
I tried import geopandas as gp, but Error Message says: No module names
'geopandas'.
Can anyone help?
Regards,
David
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My command line kept telling me that it ogr2ogr can not open gfs file. It
does find it.
I was trying to load GML onto PostGIS.
Alternatively, how to specify XSD file to go along with reading GML files?
Regards,
David
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Can we do something like import an fme.something and make use of FME
modules and functions?
Regards,
David
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I got quite a few version of Python on my machine.
How do I set environmental variables for Python 3.6.1 to work?
Regards,
David
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Set Operation System but not disturbing existing setting. Only to add at
the command line.
Regards,
David
On Mon, 17 Jan 2022 at 10:57, dn via Python-list
wrote:
> On 17/01/2022 22.31, Shaozhong SHI wrote:
> > I got quite a few version of Python on my machine.
> >
&
The following is used in a loop to get response code for each url.
print (urllib.request.urlopen(url).getcode())
However, error message says: URLError:
Python 3.6.5 is being used to test whether url is live or not.
Can anyone shed light on this?
Regards,
David
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I have a cvs file of 932956 row and have to have time.sleep in a Python
script. It takes a long time to process.
How can I speed up the processing? Can I do multi-processing?
Regards,
David
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Can it be divided into several processes?
Regards,
David
On Saturday, 19 February 2022, Chris Angelico wrote:
> On Sat, 19 Feb 2022 at 22:59, Karsten Hilbert
> wrote:
> >
> > > > I have a cvs file of 932956 row and have to have time.sleep in a
> Python
> > > > script. It takes a long time to p
On Sat, 19 Feb 2022 at 19:44, Mats Wichmann wrote:
> On 2/19/22 05:09, Shaozhong SHI wrote:
> > Can it be divided into several processes?
> > Regards,
> > David
>
> The answer is: "maybe". Multiprocessing doesn't happen for free, you
> have to fi
On Sat, 19 Feb 2022 at 18:51, Alan Gauld wrote:
> On 19/02/2022 11:28, Shaozhong SHI wrote:
>
> > I have a cvs file of 932956 row
>
> That's not a lot in modern computing terms.
>
> > and have to have time.sleep in a Python
> > script.
>
> Why? Is it
I downloaded .whl files for fiona and gdal to go with Python3.6.5.
However, I am having trouble with red error messages.
Though Gdal is now working, there is a warning message - Missing global ~
gdal: DRIVER_NAME declaration gdal_array,py
Can anyone advise on how to resolve the issues?
Regard
The following warning kept coming up when running ogr2ogr.
Warning 1: Missing global # gdal: DRIVER_NAME declaration in
C:\Users\AppData\Local\Programs\Python\Python36\Lib\site-packages\osgeo\gdal_array.py
What steps to be take to resolve this issue?
Regards,
David
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Hello,
I got a json response from an API and tried to use pandas to put data into
a dataframe.
However, I kept getting this ValueError: arrays must all be same length.
Can anyone help?
The following is the json text. Regards, Shao
{
"locationId": "1-1004508435",
"providerId": "1-101641521
Hi, All,
I was trying to handle the value of "personRoles" in a part of json
dictionary.
Can anyone tell me various ways to handle this?
Regards,
Shao
"regulatedActivities": [
{
"name": "Accommodation for persons who require nursing or personal
care",
"code": "RA2",
"con
tten table?
Apparently, the nested data is another table.
Regards,
Shao
On Sun, 4 Oct 2020 at 13:55, Tim Williams wrote:
> On Sun, Oct 4, 2020 at 8:39 AM Tim Williams wrote:
>
> >
> >
> > On Fri, Oct 2, 2020 at 11:00 AM Shaozhong SHI
> > wrote:
> >
Are there Python ways to execute queries on PostgreSQL without getting data
over?
Are there ways just to fire off PostgreSQL queries and not get data into
Python?
Regards,
David
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Even worse is that, in some cases, an addition called serviceRatings as a
key occur with new data unexpectedly.
How to produce a robust Python/Panda script to coping with all these?
Regards,
David
u'historicRatings': [{u'overall': {u'keyQuestionRatings': [{u'name':
u'Safe', u'rating': u'Require
Is there another way to do this?
def greet(name: str) -> str:
return "Hello, " + name
greet
File "", line 1 def greet(name: str) -> str:
^ SyntaxError: invalid syntax
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I found this last option is very interesting.
Saving the dataframe to memory using StringIO
https://naysan.ca/2020/06/21/pandas-to-postgresql-using-psycopg2-copy_from/
But, testing shows
unicode argument expected, got 'str'
Any working example for getting DataFrame into a PostgreSQL table direc
Hi, Hernan,
Did you try to parse GML?
Surely, there can be very concise and smart ways to do these things.
Regards,
David
On Fri, 6 Nov 2020 at 20:57, Hernán De Angelis
wrote:
> Thank you Terry, Dan and Dieter for encouraging me to post here. I have
> already solved the problem albeit with a
Hi,
I keep getting the following error when I use engine =
create_engine(logging in details to postgres)
df.to_sql('table_name', and etc.)
OperationalError: (psycopg2.OperationalError) SSL connection has been
closed unexpectedly
(Background on this error at: http://sqlalche.me/e/13/e3q8)
Operat
Hi,
When I use nbconvert to run Jupyter notebook, it is so difficult to see the
full error message for debugging?
How to save full error messages?
Regards,
David
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How to run Jupyter notebook in command line and get full error messages?
My VPN keeps dropping and can not run Jupyter Notebook as it is.
I started to use nbconvert in command line.
But, when it stops due to error, I can not see where the error occurs.
In order to make life easier for debugging
We have been running Jupyter Notebook processes, which take long time to
run.
We use nbconvert to run these in commandline. Nbconvert only writes output
into a file at the end.
We just wonder whether there is a way to observe the progress and printing
messages when nbconvert is running.
Regards
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 and
is there any Python code for spatial tessellation?
thanks a lot!
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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 a
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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>
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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):
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 document
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 document
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&q
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', ' ',
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 '\'?
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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
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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27;defenestrate']
>>> for x in a[:]:
... if len(x) > 4: a.insert(0, x)
...
>>> a
['defenestrate', 'window', 'defenestrate', 'defenestrate', 'cat',
'window', 'defenestrate']
On 10/25/05, Fred
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 =
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
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):
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(EN
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:\P
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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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?
>
> Delaun
gt; >
> >
> >
> >>Or, do you mean radio triangulation by directional signal propagation
> >>
> >>
> >
> >
> >
> >>Or, do you mean drawing a triangle in Tkinter?
> >>
> >>
> >
> >Or even triangulation of currency from EU
ut?
On 11/11/05, Salvatore Di Dio <[EMAIL PROTECTED]> 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
&
On 11/11/05, Fredrik Lundh <[EMAIL PROTECTED]> wrote:
> Shi Mu wrote:
>
> > I tried to install WCK(Widget Construction Kit (WCK)):
> >
> > C:\Python23>python tkinter3000-1.0-20031212\setup.py install
> > Traceback (most recent call last):
> > File &qu
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(
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 = [ ]
> &
On 11/11/05, Fredrik Lundh <[EMAIL PROTECTED]> wrote:
> Shi Mu wrote:
>
> > > > I tried to install WCK(Widget Construction Kit (WCK)):
> > > >
> > > > C:\Python23>python tkinter3000-1.0-20031212\setup.py install
> > > > Traceback (m
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 ?
>
>
print buildList() gets lots of stuffs f
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 tkinter3000-1.0-20031
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'
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