Re: [Tutor] how can i use python 2 alongside 3?
On Thu, Jan 24, 2013 at 5:39 PM, Matthew Ngaha wrote: > > D:\Data\Py\mywork>ftype Python.File > Python.File="D:\Data\Py2.7\python.exe" "%1" %* That's the file class created by the 2.7 installer in the HKLM (local machine) Software hive. Overview of the Windows Registry: http://en.wikipedia.org/wiki/Windows_Registry The cmd shell's assoc/ftype use HKLM classes. However, I see now that the standalone launcher configures HKCU (current user) classes. These take precedence over HKLM classes, so assoc and ftype aren't showing the complete picture. HKCR (classes root) is the merged view. The following shows the current default command to open a Python.File: reg query HKCR\Python.File\shell\open\command > i dont quit understand when you say UserChoice is set to the Progid > "Python.File"? what is Progid? i cant seem to locate that path > HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py. reg query HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py\UserChoice If you've selected a default using the "Open With" dialog, there should be a 'Progid' set to, for example, Python.File. Modify this using the Explorer "Open With"/"Choose Default Program..." dialog. I mention this because installers don't generally modify this key. It's set manually by the user -- possibly to an editor or a specific Python executable instead of the configured Python.File class. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> In a cmd shell, check that 'assoc .py' is "Python.File" and that > 'ftype Python.File' points to py.exe in your Windows directory, e.g. > "C:\Windows\py.exe "%1" %*'. If it's wrong, re-install. Or fix it > manually using assoc and ftype in an elevated cmd shell, which updates > the local machine registry keys in HKLM\Software\Classes. i think this is ok, i got these results. D:\Data\Py\mywork>assoc .py .py=Python.File D:\Data\Py\mywork>ftype Python.File Python.File="D:\Data\Py2.7\python.exe" "%1" %* > Also, Windows Explorer has an "Open With" dialog that configures > per-user settings for multiple associations, including a default (i.e. > the "Always use..." checkbox). These keys are stored in > HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py. > Make sure that UserChoice is set to the Progid "Python.File". You > should be able to change this using the 'Open With->Choose Default > Program...' dialog. > i dont quit understand when you say UserChoice is set to the Progid "Python.File"? what is Progid? i cant seem to locate that path HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On Thu, Jan 24, 2013 at 9:35 PM, eryksun wrote: > On Thu, Jan 24, 2013 at 1:56 PM, Matthew Ngaha wrote: >> >> py is not recognized and and it said "depending on how it was >> installed". the problem is it didnt allow me to select a path when >> installing. > > The simpler installer is launchwin.msi, which installs to the Windows > directory. This directory should already be on the PATH. > > In a cmd shell, check that 'assoc .py' is "Python.File" and that > 'ftype Python.File' points to py.exe in your Windows directory, e.g. > "C:\Windows\py.exe "%1" %*'. If it's wrong, re-install. Or fix it > manually using assoc and ftype in an elevated cmd shell, which updates > the local machine registry keys in HKLM\Software\Classes. > > Also, Windows Explorer has an "Open With" dialog that configures > per-user settings for multiple associations, including a default (i.e. > the "Always use..." checkbox). These keys are stored in > HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py. > Make sure that UserChoice is set to the Progid "Python.File". You > should be able to change this using the 'Open With->Choose Default > Program...' dialog. > > You can customize pylauncher by editing its ini file in your profile. > For example, run 'notepad %localappdata%\py.ini' to create/edit it. > See the docs for the settings, such as changing the default > interpreter and adding custom shebangs. sorry i didnt see this message. I havent read it yet although it looks complicated. Thanks ill report back if i need help ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> Did you find the "control-panel-way" to modify the PATH (assuming py.exe > wasn't already in there) ? Without it, I'd be surprised if right-click > would work correctly. > > And as for IDLE, there are two different IDLEs, one in each directory. So > run the one that corresponds to the python you'll be using. How to do that? > I dunno, since I don't use IDLE, but I'd find or make batch files called > something like IDLE2.bat and IDLE3.bat that know how to find and run the > appropriate IDLE. > i didnt use the control panel way but the right click is now working, it was an error that in the script i had a txt.file open() and the right click way said "no such file" but the other ways found the txt file which is weird but right clicking works for other files without a txt file. i can live with that. i think it wise for me to try to permanently add the path with control panel. Thanks for all the help, its such a relief to now be able to run python 2 files ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On Thu, Jan 24, 2013 at 1:56 PM, Matthew Ngaha wrote: > > py is not recognized and and it said "depending on how it was > installed". the problem is it didnt allow me to select a path when > installing. The simpler installer is launchwin.msi, which installs to the Windows directory. This directory should already be on the PATH. In a cmd shell, check that 'assoc .py' is "Python.File" and that 'ftype Python.File' points to py.exe in your Windows directory, e.g. "C:\Windows\py.exe "%1" %*'. If it's wrong, re-install. Or fix it manually using assoc and ftype in an elevated cmd shell, which updates the local machine registry keys in HKLM\Software\Classes. Also, Windows Explorer has an "Open With" dialog that configures per-user settings for multiple associations, including a default (i.e. the "Always use..." checkbox). These keys are stored in HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.py. Make sure that UserChoice is set to the Progid "Python.File". You should be able to change this using the 'Open With->Choose Default Program...' dialog. You can customize pylauncher by editing its ini file in your profile. For example, run 'notepad %localappdata%\py.ini' to create/edit it. See the docs for the settings, such as changing the default interpreter and adding custom shebangs. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 24 January 2013 20:14, Matthew Ngaha wrote: >> > thanks Dave. the file was py.exe as you said and the temporary path is > able to open both version 2 and 3's python.exe. There seems to be a > problem. python 2 seems to be the only version opening my files unless > i do a few things. So with the shebang set: > > the python launcher, launches my python 3 files with the correct > version if i double click the file or run it from a console. But it > uses the wrong version if i run it from IDLE or if i right click the > file and open with the Python Launcher. i guess i can live with that, > but is there anyway around this? Each version of Python has it's own version of IDLE. If you use the IDLE that came with Python 2 it will always run in Python 2. I think the same is true for the "Python launcher". Probably you have more than one version of these programs installed. You could create shortcuts (or something like that) to run the Python 3 versions. In any case, this is the reason that the py.exe launcher was created, so that you could have one launcher that would run each script in the appropriate version of Python. Oscar ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> I'm not using it, since I'm not using Windows. So these are guesses based > on years stuck\b\b\b\b\b spent in the Windows environment. > > Clearly, the name of the program is py.exe, so that's what you should try > searching for. From the cmd prompt, try dir /s py.exe > > Or, you could just try searching under c:\windows since that's where it's > likely to be. > > To see your PATH, type PATH at the cmd prompt. > > To make temporary changes to your PATH (if py.exe is in an obscure place), > just type > set PATH=c:\mydir;%PATH% > > To make permanent changes to PATH, you have to change the environment > variables in the Control Panel. I've done it many times, but don't recall > just where it is. Such permanent changes will affect any new runs of CMD, > as well as affect any other program subsequently started. > thanks Dave. the file was py.exe as you said and the temporary path is able to open both version 2 and 3's python.exe. There seems to be a problem. python 2 seems to be the only version opening my files unless i do a few things. So with the shebang set: the python launcher, launches my python 3 files with the correct version if i double click the file or run it from a console. But it uses the wrong version if i run it from IDLE or if i right click the file and open with the Python Launcher. i guess i can live with that, but is there anyway around this? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 01/24/2013 01:56 PM, Matthew Ngaha wrote: Have you added shebang lines to those scripts yet? yes i added them. i think the problem is at the start where it asks me to: You should ensure the launcher is on your PATH - depending on how it was installed it may already be there, but check just in case it is not. From a command-prompt, execute the following command: py You should find that the latest version of Python 2.x you have installed is started .. py is not recognized and and it said "depending on how it was installed". the problem is it didnt allow me to select a path when installing. it just automatically did everything. i have searched my PC for python launcher but it cant find it, so i dont know where its location is. i see it in "control panel" to uninstall a program but right clicking it doesnt give me an option to see its containing folder I'm not using it, since I'm not using Windows. So these are guesses based on years stuck\b\b\b\b\b spent in the Windows environment. Clearly, the name of the program is py.exe, so that's what you should try searching for. From the cmd prompt, try dir /s py.exe Or, you could just try searching under c:\windows since that's where it's likely to be. To see your PATH, type PATH at the cmd prompt. To make temporary changes to your PATH (if py.exe is in an obscure place), just type set PATH=c:\mydir;%PATH% To make permanent changes to PATH, you have to change the environment variables in the Control Panel. I've done it many times, but don't recall just where it is. Such permanent changes will affect any new runs of CMD, as well as affect any other program subsequently started. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> > Have you added shebang lines to those scripts yet? > yes i added them. i think the problem is at the start where it asks me to: You should ensure the launcher is on your PATH - depending on how it was installed it may already be there, but check just in case it is not. >From a command-prompt, execute the following command: py You should find that the latest version of Python 2.x you have installed is started .. py is not recognized and and it said "depending on how it was installed". the problem is it didnt allow me to select a path when installing. it just automatically did everything. i have searched my PC for python launcher but it cant find it, so i dont know where its location is. i see it in "control panel" to uninstall a program but right clicking it doesnt give me an option to see its containing folder ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 01/24/2013 01:26 PM, Matthew Ngaha wrote: yes the 2nd option (standalone pylauncher) sounds more convienient for me. i just have to try and comprehend all the instructions given.. hopefully ill get there in the end i managed to install the laucher. on the site when i click the correct launcher 32bit, i chose "run" and it automatically installed rather than asking me or allowing me to install it in cmd like their directions showed. my python 3 files still open but python 2 files still return errors like: print "string" is invalid syntax which tells me its still using python 3 to open these files. when i right click .py files a new option has been added to "open with" which is open with Python Launcher for Windows. Even when i do this my python 2 files won't open Have you added shebang lines to those scripts yet? -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> yes the 2nd option (standalone pylauncher) sounds more convienient for > me. i just have to try and comprehend all the instructions given.. > hopefully ill get there in the end i managed to install the laucher. on the site when i click the correct launcher 32bit, i chose "run" and it automatically installed rather than asking me or allowing me to install it in cmd like their directions showed. my python 3 files still open but python 2 files still return errors like: print "string" is invalid syntax which tells me its still using python 3 to open these files. when i right click .py files a new option has been added to "open with" which is open with Python Launcher for Windows. Even when i do this my python 2 files won't open ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> > You don't have to uninstall 3.1 but you would have to install all the > downloaded modules or packages that you have in your 3.1 site packages > folder to the 3.3 site packages folder. Maybe it's easier to simply grab > the standalone pylauncher as I suggested earlier. Only you know what is the > path of least resistance. > yes the 2nd option (standalone pylauncher) sounds more convienient for me. i just have to try and comprehend all the instructions given.. hopefully ill get there in the end ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 24/01/2013 16:11, Matthew Ngaha wrote: there was a lot of reading in the previous links, i got a bit lost as i didnt recognize a lot of the words they were using. If i install Pyhon 3.3 do i need to uninstall my current python 3.1 and reinstall all the downloaded modules/packages i installed? You don't have to uninstall 3.1 but you would have to install all the downloaded modules or packages that you have in your 3.1 site packages folder to the 3.3 site packages folder. Maybe it's easier to simply grab the standalone pylauncher as I suggested earlier. Only you know what is the path of least resistance. -- Cheers. Mark Lawrence ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 01/24/2013 11:11 AM, Matthew Ngaha wrote: Python 3.3 for Windows comes with a "launcher", which will approximate (for Python only) what Unix and Linux users have had for years for any scripting language. You can get it separately, as Mark Lawrence has said, but maybe it's time to bring your 3.x current. there was a lot of reading in the previous links, i got a bit lost as i didnt recognize a lot of the words they were using. If i install Pyhon 3.3 do i need to uninstall my current python 3.1 and reinstall all the downloaded modules/packages i installed? I don't really know, so all the rest of this message is a guess. My guess is that 3.1 and 3.3 can coexist, but that you'd need to reinstall the modules/packages that you're using, and hope that they all can handle 3.3 When upgrading a minor upgrade (eg. from 3.1.1 to 3.1.2), I believe it'd go in the same place, and not require reinstalling the packages. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
> > Python 3.3 for Windows comes with a "launcher", which will approximate (for > Python only) what Unix and Linux users have had for years for any scripting > language. You can get it separately, as Mark Lawrence has said, but maybe > it's time to bring your 3.x current. > there was a lot of reading in the previous links, i got a bit lost as i didnt recognize a lot of the words they were using. If i install Pyhon 3.3 do i need to uninstall my current python 3.1 and reinstall all the downloaded modules/packages i installed? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 01/24/2013 08:46 AM, Matthew Ngaha wrote: hi guys i am a python 3.1.1. user but really need to use python 2 to be able to use certain libraries and frameworks. i have installed python 2.7 but they cant run together as all .py and .pyw files are opened with python 3. i can open simple python 2 files by right clicking and finding pythons 2's python.exe, but these only works for simple files with no imports because the import i think seems to look in the python 3 directory and can't find the packages. i have checked stackoverflow for answers but i get lost in all the terms and keywords they use to solve this. is there a simple straightfoward way to fix this that is easy for someone like me to understand or follow? thanks. i use windows vista Python 3.3 for Windows comes with a "launcher", which will approximate (for Python only) what Unix and Linux users have had for years for any scripting language. You can get it separately, as Mark Lawrence has said, but maybe it's time to bring your 3.x current. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how can i use python 2 alongside 3?
On 24/01/2013 13:46, Matthew Ngaha wrote: hi guys i am a python 3.1.1. user but really need to use python 2 to be able to use certain libraries and frameworks. i have installed python 2.7 but they cant run together as all .py and .pyw files are opened with python 3. i can open simple python 2 files by right clicking and finding pythons 2's python.exe, but these only works for simple files with no imports because the import i think seems to look in the python 3 directory and can't find the packages. i have checked stackoverflow for answers but i get lost in all the terms and keywords they use to solve this. is there a simple straightfoward way to fix this that is easy for someone like me to understand or follow? thanks. i use windows vista ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor See http://www.python.org/dev/peps/pep-0397/ which leads to https://bitbucket.org/vinay.sajip/pylauncher -- Cheers. Mark Lawrence ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] String formatting expression "g" conversion type case.
On 24/01/2013 13:29, Krupkina Lesya Olegovna wrote: Hello! I’m newcomer to Python and I’m on documentation reading stage and trying some of examples. I’m using Win7 x64 OS and Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)]. I try to understand how string format expression (%)works. Everything is almost clear but except one case: using ofg(G) conversion type and # flag. Let’s take a look at documentation here: http://docs.python.org/release/2.7.3/library/stdtypes.html#sequence-types-str-unicode-list-tuple-bytearray-buffer-xrange Document declares for g(G) conversion type in case of using # flag (4th note): “The precision determines the number of significant digits before and after the decimal point and defaults to 6”. I have noticed behavior that does not meet documentation declaration and looks like a bug in case when using g(G) conversion type with # flag with omitted precision and zero integer part of the decimal. Could someone, please comment the case it is a bug or right use case result? If it is correct, please explain why. Steps to reproduce the case: 1.Start python interactive mode 2.Enter string with g(G) conversion type and using #flag like this: "%#g"%0.3 – precision parameter is omitted and integer part of the decimal is zero. 3.Watch the output results Actual result: Python outputs decimal as declared as but with more significant digits than default value of 6 - if integer part of the decimal is equal to zero. "%#g"%0.3 '0.30' "%#G"%0.3 '0.30' "%#G"%0.004 '0.0040' Expected results: As declared in documentation – there will be 6 significant digits before and after decimal point by default. Thanks, Regards, Lesya. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor My experience is that things that look odd at first sight are VERY rarely bugs - especially in something as mature as Python 2.7. Maybe the documentation could be slightly clearer, but I see it as saying the following: '#g' and '#G' both convert to exponential format (with some exceptions) with a default precision of 6 *significant figures*. It is certainly talking about significant figures, not decimal places. So your final example may look odd, but it really is doing what it says - there are 6 s.f. shown, and it has not converted to exponential form because the exponent would not be less than -4. With significant digits before the decimal point, it appears to convert to exponential form only if the number of them exceeds the precision. Best Barnaby ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] String formatting expression "g" conversion type case.
Krupkina Lesya Olegovna wrote: > Python outputs decimal as declared as but with more significant digits > than default value of 6 - if integer part of the decimal is equal to zero. "%#g"%0.3 > '0.30' In this context "significant digits" are the first non-zero digit and any digits (including zero) that follow it. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] how can i use python 2 alongside 3?
hi guys i am a python 3.1.1. user but really need to use python 2 to be able to use certain libraries and frameworks. i have installed python 2.7 but they cant run together as all .py and .pyw files are opened with python 3. i can open simple python 2 files by right clicking and finding pythons 2's python.exe, but these only works for simple files with no imports because the import i think seems to look in the python 3 directory and can't find the packages. i have checked stackoverflow for answers but i get lost in all the terms and keywords they use to solve this. is there a simple straightfoward way to fix this that is easy for someone like me to understand or follow? thanks. i use windows vista ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] String formatting expression "g" conversion type case.
Hello! I’m newcomer to Python and I’m on documentation reading stage and trying some of examples. I’m using Win7 x64 OS and Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)]. I try to understand how string format expression (%)works. Everything is almost clear but except one case: using ofg(G) conversion type and # flag. Let’s take a look at documentation here: http://docs.python.org/release/2.7.3/library/stdtypes.html#sequence-types-str-unicode-list-tuple-bytearray-buffer-xrange Document declares for g(G) conversion type in case of using # flag (4th note): “The precision determines the number of significant digits before and after the decimal point and defaults to 6”. I have noticed behavior that does not meet documentation declaration and looks like a bug in case when using g(G) conversion type with # flag with omitted precision and zero integer part of the decimal. Could someone, please comment the case it is a bug or right use case result? If it is correct, please explain why. Steps to reproduce the case: 1.Start python interactive mode 2.Enter string with g(G) conversion type and using #flag like this: "%#g"%0.3 – precision parameter is omitted and integer part of the decimal is zero. 3.Watch the output results Actual result: Python outputs decimal as declared as but with more significant digits than default value of 6 - if integer part of the decimal is equal to zero. >>> "%#g"%0.3 '0.30' >>> "%#G"%0.3 '0.30' >>> "%#G"%0.004 '0.0040' >>> Expected results: As declared in documentation – there will be 6 significant digits before and after decimal point by default. Thanks, Regards, Lesya. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Small personal project to fill CDs/DVDs...
On 24/01/13 05:32, SCS Barry wrote: Need to fill some DVDs. Sounds like an interesting project. Most of what you need is in the os module. create a python application that works on many different platforms, but can work without problems on Windows (ALL), Linux (ALL) using Gtk/xfce/other (need suggestions), and Unix (really need suggestions). Tkinter or even EasyGUI should work fine for this and is portable. Full solution for me will accept start directory and -c or -d parm How do you specify the size? CD Roms come in 650M, 800M and 900M variants (probably more!) Same with DVDs, single sided v double etc... is not passed, there will be a "browse" interface to choose the directory to start from (will determine OS from os call) and a media drop-down selection. Will require a standard GUI environment like windows/gtk/"something". Any GUI framework will do that. The main process will create a list of fully-qualified file names, file sizes. listdir or os.walk will do that combined with the file property functions to get size. Then, it will build a grouped list of files, filling media as effectively as possible. Thats just standard programming. Wikipedia might have saome best-fit algorithms that can help. Last, it will print on screen the lists of FQFNs and filesizes that will go on each backup disk. Again straight programming. The trickiest bit might be the actual writing to the media. I'm not sure how you do that portably... More research there I suspect. Maybe the OS will do it transparently if you are lucky. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
