🌐 Mailman 3 April 2004 - Tutor - python.org

randomly gen values from .000001 to 10
by kevin parks May 6, 2004

May 6, 2004

Hi. I need to generate random values from 0.000001 to 10.00 i know that i can scale values with something like random.random()*.01 to get smaller values or random.random()*10 to get larger, but i am not sure how to get good random values over the whole range. I'd also love to be able to able to generate 0.000001 to 10.00 that were not an even distribution but tended towards certain values, but that maybe a problem for a different day... for now i would be happy with just getting 0.000001 to 10.00 cheers, kevin U-Va

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double backslash in Windows paths
by tpc＠csua.berkeley.edu May 1, 2004

May 1, 2004

hi everybody, what do you guys use to convert a Windows path, with single backslash, to double backslash ? I ask this because I've been using os.path.normpath, and it leaves A LOT to be desired. If you pass it a path, and say some directory in the path starts with a number, os.path.normpath WILL mangle the path by inserting a '\x{hex value}' instead of the desired behavior, '\\{dirname}'. Then you have to go back and clean up and add in the extra backslash in the string before using it.

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Tkinter
by olavi＠city.ee May 1, 2004

May 1, 2004

Hi everybody! Can anybody tell, what is the difference between label = Label(root, text="Label1").grid() and label = Label(root, text="Label1") label.grid() Which method is better to use? Regards Olavi Ivask

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Re: [Tutor] GUI component (fwd)
by Danny Yoo April 30, 2004

April 30, 2004

[I'm forwarding Bintang's request to tutor(a)python.org. I currently don't have Tkinter installed on my laptop, so I can't show Bintang an example PMW install. Can anyone else help? Thanks!] ---------- Forwarded message ---------- Date: Fri, 30 Apr 2004 03:26:40 -0700 (PDT) From: bintang kurniawan <bintangkurniawan(a)yahoo.com> To: Danny Yoo <dyoo(a)hkn.eecs.berkeley.edu> Subject: Re: [Tutor] GUI component thank you for your guide, i have the file but icant install (load) it to my python please give advise thanks, rgds, bintang Danny Yoo <dyoo(a)hkn.eecs.berkeley.edu> wrote: On Thu, 22 Apr 2004, bintang kurniawan wrote: > im new beginer in python laguage, and would like to now more on GUI > programming (TK inter). my question is : Hi Bintang, Ah! Ok, there's a lot of tutorials on Tkinter here: http://www.python.org/topics/tkinter/doc.html > 1. how to inherrit component and add some additional function to it. The example here: http://www.python.org/doc/current/lib/node633.html shows how to inherit from a Tkinter frame; we can do the same extension to other widgets by inheritance. > 2. where can i find Combobox and DataGrid component? and how to install > to the python environtment? Those two widgets are part of an Tkinter extention called the Python Megawidgets (PMW). You can find the PMW here: http://pmw.sourceforge.net/ If you have more questions, please feel free to ask! --------------------------------- Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs

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Coding philosophy
by firephreek April 30, 2004

April 30, 2004

Is it 'wrong' to add fucntions to your program that only make the code 'easier' to read and write? For example, I'm working on that wxPython program, and rather than create a different name for each 'row' in the notebook layout, or even a numbered array, I 'enumerated' a dictionary so that I can reference a row by the name I give it. <code> def RowEnum(self, parent, *args): parent.row = {} for i in args: parent.row[i] = wxBoxSizer(wxHORIZONTAL) return parent.row </code> Instead of: <code> parent.VendorId = wxBoxSizer(wxHORIZONTAL) parent.VendorName = wxBoxSizer(wxHORIZONTAL) parent.RowSpacer = wxBoxSizer(wxHORIZONTAL) parent.VendorItemID = wxBoxSizer(wxHORIZONTAL) </code> Etc... The idea (imo-head) was that each time I wanted to add or remove a 'row' of stuff, I could just add the name to the caller, and not worry about typing everything out. I figured it'd make my code more readable and make more sense. Is that 'ethical'? Silly question I suppose, but I guess it's kinda in my head that I shouldn't waste resources just so I can be lazy. So sue me, I'm an american. Hah. Stryder The rest of the specifc function that uses this is below. Hope that's ok. Figured that'd help the context of this question a bit more. There will be other notebook pages, so I can reuse this function. ************************************************************************ ********************************* def OnInput(self, e): panel = wxPanel(self.itemInput, -1) panel.column = wxBoxSizer(wxVERTICAL) row = self.RowEnum(panel, 'VendorID', 'VendorName', 'RowSpacer') VendorID_list = ['1','2','3','4','5','6','7'] #these two lines will consolidate to a dictionary. VendorName_list = ['one', 'two', 'three', 'four', 'five', 'six', 'seven'] row['RowSpacer'].Add((60, 7), 0, wxEXPAND) #an empty spacer # TEXT: |Combo Box| row['VendorID'].Add(wxStaticText(panel, -1, "Vendor ID#: "), flag = wxTOP, border = 4) row['VendorID'].Add(wxComboBox(panel, ID_VENDOR_ID, "123456", None,(70,-1), VendorID_list, wxCB_DROPDOWN #|wxTE_PROCESS_ENTER )) # TEXT: |COMBOBOX| |BUTTON| row['VendorName'].Add(wxStaticText(panel,-1, "Vendor Name: "), flag = wxTOP, border = 4) row['VendorName'].Add(wxComboBox(panel, ID_VENDOR_NAME, "", None, (150, -1), VendorName_list, wxCB_DROPDOWN )) b_moreInfo = wxButton(panel, ID_MORE_INFO_BUTTON, "More Info...") b_moreInfo.SetToolTipString("Get More Info On This Vendor...") row['VendorName'].Add((15,10),0,wxEXPAND) row['VendorName'].Add(b_moreInfo, flag = wxTOP) #put it all together panel.column.Add(panel.row['RowSpacer'], 0, wxALIGN_LEFT) panel.column.Add(panel.row['VendorID'], 0, wxALIGN_LEFT) panel.column.Add(panel.row['RowSpacer'], 0, wxALIGN_LEFT) panel.column.Add(panel.row['VendorName'], 0, wxALIGN_LEFT) panel.column.Add(panel.row['RowSpacer'], 0, wxALIGN_LEFT) panel.SetSizer(panel.column) panel.SetAutoLayout(1) self.Show(1) self.itemInput.AddPage(panel, "Item Input")

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cgi, fastcgi, mod_python
by Mike Hansen April 30, 2004

April 30, 2004

Hello, I've recently started experimenting with Python to write web apps. My first app did a little form processing using the cgi module. Performance isn't a huge issue, but I'm curious on how to pep it up if the need should arise. I'm a bit confused on other solutions like FastCGI and Mod_Python. If I decided to use FastCGI, would I need to significantly change my code? I didn't get the impression that you just install it, modify your apache config, and import FastCGI in your code instead of the cgi module. The same with Mod_Python. Could someone briefly explain the differences in coding cgi, FastCGI, or Mod_Python if there are any differences? Thanks, Mike Hansen

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env shebang with options
by Thorsten Kampe April 30, 2004

April 30, 2004

I'm trying to set up a Python script with a shebang with options: % cat test.py #! /usr/bin/env python -Ot print 11 % chmod 700 test.py; ./test.py /usr/bin/env: python -Ot: No such file or directory % env --version env (coreutils) 5.0.91 According to Alex Martelli in "Python in a Nutshell" this should work: "On Unix-like systems, you can make a Python script directly executable by setting the file's permission bits /x/ and /r/ and beginning the script with a so called /shebang/ line, which is a first line of the form: #!/usr/bin/env python {options} providing a path to the /python/ program." I've already tried all variations of the shebang I can think of. None work except the trivial "#! /usr/bin/python -Ot". % env --help Usage: env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...] So it /should/ work... Why not? Thorsten

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exception question
by Dave S April 30, 2004

April 30, 2004

Is it possible, for the code after except to know the exception type. I know I can do multiple "except"s for each condition but this is not realy what I want. try: .... ...code... .... except: ...code .... Cheers Dave

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matrixes
by Conrad April 30, 2004

April 30, 2004

Thanks for all the responses. I opted to solve the problem before I read the responses, so I'm a bit late getting back, but it was a lot of help. I'll get back to you with any more difficulties I encounter Thanks a lot p.s. No confusion Alan G :)

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": No such file or directory"
by tpc＠csua.berkeley.edu April 29, 2004

April 29, 2004

Hi everybody, has anybody gotten the strange message above when trying to execute a Python script from command line ? I wrote it on a Linux box and ported it to Windows by adding and commenting out a few lines. It was working fine then today it started to behave strangely by not completely finishing executing all the lines of code. I decided to bring the script back to Linux to see if I could get error messages from the command line to see where the problem was. When I made the necessary changes and executed it, I got: <paste> nike:/var/www/html# ./parseDonations.py : No such file or directory </paste> I then tried a diff between the two scripts (i.e, the script before I ported it to Windows, and the script after I ported it back to Linux), and for some strange reason diff gave me the entire two files, as if there was nothing in common between the two, even though my eyes could see clearly chunks of code that were exactly the same. Am I doing something wrong ?

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