Re: [Tutor] Open Source database software
On Mon, Nov 24, 2008 at 6:19 PM, Mike Meisner <[EMAIL PROTECTED]> wrote: > Y'all have been so good with suggestions on my programming problems in > the past, I wonder if anyone could provide a suggestion on a more general > topic. > 5. And, everything either in Python or with APIs that Python can > easily use. > > Has anyone used products that would meet my needs? > I haven't used anything, but you can connect to mysql databases with python, from what I've read it seems to have all the bells & whistles (and then go ahead and add the ability to do whatever you want/can do with python). I'm sure there are plenty of folks with more experience, but that's something to get you started! HTH, Wayne ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Open Source database software
Y'all have been so good with suggestions on my programming problems in the past, I wonder if anyone could provide a suggestion on a more general topic. I'd like to get away from using Microsoft Access. I have a number of Access databases to convert. My needs are: 1. A relational database management system for a single user (i.e, I don't need client/server and all the extra baggage that goes with it). The RDMS must be able to handle graphics objects. 2. Open source with a decent track record. 3. A good GUI front end for creating the database, creating forms for user data input, queries, reports, etc. 4. Smart enough to easily read and convert an Access (.mdb) database file. 5. And, everything either in Python or with APIs that Python can easily use. Has anyone used products that would meet my needs? Thanks. Mike ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] file locations
On Mon, Nov 24, 2008 at 2:10 PM, Jeff Peery <[EMAIL PROTECTED]> wrote: > Hello, > I have a wxapp from which I would like to execute another wxapp. the 'child' > wxapp is located in a sub directory of the 'parent' wxapp. The problem I'm > having is that I execute the child app from the parent app and it cannot > find the modules/images/files etc that it needs because it is looking in the > parents directory location and not its own. I want to keep the child wxapp > in its own sub directory for organizational If the child app is being run in a separate process, then specify the child dir as the working dir of the process. For example if you are using subprocess.Popen() use the cwd parameter. If the child app is imported and run in the parent process, then you need to add the child dir to sys.path, and not have any duplicate module names between the parent and child directories. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] My horrible looking program needs improvement.
On Mon, 24 Nov 2008 11:00:59 -0500 Peter van der Does <[EMAIL PROTECTED]> wrote: > I wrote my 1st Python program and it works as I want it to work but > ,IMHO, it looks horrible. > > As to what my program does: > It downloads a file from the web, downloads .htaccess and Apache log > file from a FTP site, using the IP's from the Apache log it checks if > the IP exists in the web-file, if it is it's added to the .htaccess as > a deny from. > > Most actions are logged to file and console. > > Why I think it looks horrible: > Everything is in main(), I would like to use functions but ran into > problems with the scope of my variables. > The CLI arguments check is just a bunch of IF's > > Is this the place where somebody could go over my program and give > some pointers on how to improve the structure or is there a forum out > on the Net that can help me out. > > If this is the place, how do I show the program, in-line or attached? > > Thanks in advance. > OK, I put the code here: http://pdoes.pastebin.com/m47109194 Thanks people. -- Peter van der Does GPG key: E77E8E98 WordPress Plugin Developer http://blog.avirtualhome.com GetDeb Package Builder/GetDeb Site Coder http://www.getdeb.net - Software you want for Ubuntu signature.asc Description: PGP signature ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] file locations
On Mon, Nov 24, 2008 at 1:10 PM, Jeff Peery <[EMAIL PROTECTED]> wrote: > Hello, > I have a wxapp from which I would like to execute another wxapp. the > 'child' wxapp is located in a sub directory of the 'parent' wxapp. The > problem I'm having is that I execute the child app from the parent app and > it cannot find the modules/images/files etc that it needs because it is > looking in the parents directory location and not its own. I want to keep > the child wxapp in its own sub directory for organizational purposes, but > what is the best way to deal with this problem? > > I don't know much (read just about zero) about wxapp, but at first blush I would think you should be able to give an absolute directory for all the modules/images/files, etc. rather than relative. Though I have no clue how you would do that. HTH, good luck, Wayne -- To be considered stupid and to be told so is more painful than being called gluttonous, mendacious, violent, lascivious, lazy, cowardly: every weakness, every vice, has found its defenders, its rhetoric, its ennoblement and exaltation, but stupidity hasn't. - Primo Levi ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] file locations
Hello, I have a wxapp from which I would like to execute another wxapp. the 'child' wxapp is located in a sub directory of the 'parent' wxapp. The problem I'm having is that I execute the child app from the parent app and it cannot find the modules/images/files etc that it needs because it is looking in the parents directory location and not its own. I want to keep the child wxapp in its own sub directory for organizational purposes, but what is the best way to deal with this problem? thanks, Jeff ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] My horrible looking program needs improvement.
On Mon, Nov 24, 2008 at 11:00 AM, Peter van der Does <[EMAIL PROTECTED]> wrote: > I wrote my 1st Python program and it works as I want it to work but > ,IMHO, it looks horrible. > > Is this the place where somebody could go over my program and give > some pointers on how to improve the structure or is there a forum out > on the Net that can help me out. > > If this is the place, how do I show the program, in-line or attached? Yes, we can help with that. If the program is not too long (maybe 40-50 lines max), in-line or attached is fine. For longer programs you can use something like http://pastebin.com/. The shorter your program is, the more likely someone will read and respond to it - we are all volunteers. You might also consider asking specific questions, for example post a short code snippet and ask how to solve a particular problem. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] My horrible looking program needs improvement.
Everything is in main(), I would like to use functions but ran into problems with the scope of my variables. Did your functions have parameters? Thats usually how to deal with passing names between scopes. Is this the place where somebody could go over my program Yes. If this is the place, how do I show the program, in-line or attached? If its short (<100 lines?) just paste it into a mail - try to preserve formatting please! Otherwise posting it on a web site like pastebin is a good option - provides good formatting and colouring... HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] My horrible looking program needs improvement.
On Mon, Nov 24, 2008 at 10:00 AM, Peter van der Does <[EMAIL PROTECTED] > wrote: > I wrote my 1st Python program and it works as I want it to work but > ,IMHO, it looks horrible. Nothing to be ashamed of, unless you don't mind it looking horrible. The fact that you want a clean program is a good sign! > > Why I think it looks horrible: > Everything is in main(), I would like to use functions but ran into > problems with the scope of my variables. > The CLI arguments check is just a bunch of IF's You would probably benefit from using a class then (especially if you have worries about your "main" program looking clean). You can create global class variables that each of the methods/functions have access to with the self. - for instance In [11]: class IP: : address = "192.168.1.1" : def printAddress(self): : print self.address : : In [12]: x = IP() In [13]: x.printAddress() 192.168.1.1 --- Then you just declare a new instance of your class (see In[12]) and you have access to all its methods and variables; In [15]: x.address = "127.0.0.1" In [16]: x.printAddress() 127.0.0.1 > Is this the place where somebody could go over my program and give > some pointers on how to improve the structure or is there a forum out > on the Net that can help me out. I don't know about anyone else, but I suspect most people are at least as busy as myself, but perfectly willing to help answer your questions, but I doubt anyone has the time (even if they want) to re-write your program /for/ you, but we'll be glad to help if you get stuck on a problem (or even need pointers on where else to look, if Google or your favourite search engine fails to turn up any information) Using a class should really help clean up your program and help eliminate your scope problems. Here's a nifty little tutorial on python classes: http://www.diveintopython.org/object_oriented_framework/defining_classes.html Give classes a try and see if helps. If you're still having issues or you don't understand something, feel free to ask! HTH, Wayne ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] My horrible looking program needs improvement.
I wrote my 1st Python program and it works as I want it to work but ,IMHO, it looks horrible. As to what my program does: It downloads a file from the web, downloads .htaccess and Apache log file from a FTP site, using the IP's from the Apache log it checks if the IP exists in the web-file, if it is it's added to the .htaccess as a deny from. Most actions are logged to file and console. Why I think it looks horrible: Everything is in main(), I would like to use functions but ran into problems with the scope of my variables. The CLI arguments check is just a bunch of IF's Is this the place where somebody could go over my program and give some pointers on how to improve the structure or is there a forum out on the Net that can help me out. If this is the place, how do I show the program, in-line or attached? Thanks in advance. -- Peter van der Does GPG key: E77E8E98 WordPress Plugin Developer http://blog.avirtualhome.com GetDeb Package Builder/GetDeb Site Coder http://www.getdeb.net - Software you want for Ubuntu signature.asc Description: PGP signature ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] the sense of brackets
On Sat, 22 Nov 2008 22:58:48 +0100, spir wrote:
> W W a écrit :
> > On Sat, Nov 22, 2008 at 9:42 AM, spir <[EMAIL PROTECTED]> wrote:
> >
> >> I have long thought "[]" /simply/ is a list constructor syntax. What
> >> do you think of the following?
> >>
> >> t = "aze"
> >> print t, list(t), [t]
> >> print list(list(t)), list([t]), [list(t)], [[t]] ==>
> >> aze ['a', 'z', 'e'] ['aze']
> >> ['a', 'z', 'e'] ['aze'] [['a', 'z', 'e']] [['aze']]
> >
> > Consider the following:
> > In [1]: list("Hello")
> > Out [1]: ['H', 'e', 'l', 'l', 'e', 'o'] and the list docstring:
> > list() -> new list
> > list(sequence) -> new list initialized from sequence's items so
> > list(list(t)) makes perfect sense: list(t) is ['a', 'z' ,'e'] and
> > list(list(t)) simply creates a new list initialized from that list's
> > items HTH,
> > Wayne
>
> Yep! What surprises me is the behaviour of [] instead. I can understand
> that list(t) != [t]
> but
> [list(t)], [[t]] --> [['a', 'z', 'e']] [['aze']] is a bit strange to me.
>
what do you expect [] should do on that case? I think it's perfectly
reasonable and consistent with the semantic for [] to just simply
"enclose" whatever inside it with []s instead of converting an iterable
to a list as list() does.
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Re: [Tutor] faulty code (maths)
David schreef:
Hello everybody,
I recently came across a book by Prof. Langtangen: Indroduction to
Computer Programming: http://folk.uio.no/hpl/INF1100/INF1100-ebook-Aug08.pdf
I am trying to solve exercise 1.18 ("Why does the following program not
work correctly?"), but I don't find the mistake: why does the line
q = sqrt(b*b - 4*a*c)
cause an error? I was playing around with the code, but got nowhere.
Here the entire code:
a = 2; b = 1; c = 2
from math import sqrt
q = sqrt(b*b - 4*a*c)
x1 = (-b + q)/2*a
x2 = (-b - q)/2*a
print x1, x2
Many thanks for a pointer!
Apart from the problem of taking the square root of a negative number,
there is another problem in the code in the book: to calculate the roots
of a * x**2 + b*x + c, there should be parentheses around 2*a in the
calculation of x1 and x2:
x1 = (-b + q)/(2*a)
x2 = (-b - q)/(2*a)
Otherwise the code multiplies by a instead while it should instead
divide by a.
--
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
-- Isaac Asimov
Roel Schroeven
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