Re: Persistent Error: Python was not found
On 8/15/22, Dennis Lee Bieber wrote: > > Just double-clicking on the file will run it. The problem is that it > will open a command shell, run, and then close the command shell UNLESS one > explicitly codes some sort of "hold" at the end of the program The console window is a terminal, not a shell. If an application is flagged as a console app, as is "python.exe", and the process doesn't inherit a console, the initialization code in kernelbase.dll allocates a new console session. This could be implemented by the classic conhost.exe host, or, in Windows 11, by an openconsole.exe session that's associated with a tab in Windows Terminal. If it's the latter, Terminal can be configured to keep a tab open after the console session has ended. The tab will display the exit status of the process that allocated the console session. -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
On 8/15/22, Gisle Vanem via Python-list wrote: > Eryk Sun wrote: > >> If the redirector app >> is run without arguments, it will open the Microsoft Store to install >> the latest version of the Python store app distribution. Currently >> that means Python 3.10. > > That is true with cmd. But with a shell like 4NT, I get: >c:\> "%LocalAppData%\Microsoft\WindowsApps\python.exe" >4NT: (Sys) No access to the file. > "C:\Users\gvane\AppData\Local\Microsoft\WindowsApps\python.exe" > > No matter what I do with this "App Alias" setting. > What a broken and confusing design this AppX design is. An app execution alias is a reparse point with the tag IO_REPARSE_TAG_APPEXECLINK (0x801B). Neither the I/O manager no any driver in the kernel supports this type of reparse point. For better or worse, this is intentional. As such, if CreateFileW() is called on an alias without using the flag FILE_FLAG_OPEN_REPARSE_POINT, the attempt to traverse the link fails with ERROR_CANT_ACCESS_FILE (1920). Note that Python's os.stat() was updated to open the reparse point directly in this case instead of failing. But a lot of applications, in particular non-Microsoft shells such as MSYS bash (and apparently 4NT) haven't been updated similarly. Even if the link could be traversed, the target file under "%ProgramFiles%\WindowsApps" doesn't grant execute access to users unless they have an access token that includes a WIN://SYSAPPID attribute that corresponds to the executed app. How this works in practice when executing an app is that CreateProcessW() handles ERROR_CANT_ACCESS_FILE by opening the reparse point, reading the relevant app information, and creating a custom access token that allows it to execute the app directly via the internal equivalent of CreateProcessAsUserW(). -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
Eryk Sun wrote: If the redirector app is run without arguments, it will open the Microsoft Store to install the latest version of the Python store app distribution. Currently that means Python 3.10. That is true with cmd. But with a shell like 4NT, I get: c:\> "%LocalAppData%\Microsoft\WindowsApps\python.exe" 4NT: (Sys) No access to the file. "C:\Users\gvane\AppData\Local\Microsoft\WindowsApps\python.exe" No matter what I do with this "App Alias" setting. What a broken and confusing design this AppX design is. -- --gv -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
On Mon, 15 Aug 2022 14:38:25 +1000, Mike Dewhirst
declaimed the following:
>If you want to execute a python script without first opening a cmd
>prompt, you need a bat file or shortcut which contains the command line
>you want executed. Give that a double-click and it should also work.
>
I've never had to do that... But I have file associations set up so
that .py is considered to be an executable file.
Just double-clicking on the file will run it. The problem is that it
will open a command shell, run, and then close the command shell UNLESS one
explicitly codes some sort of "hold" at the end of the program
jnk = input("Press return to exit")
.pyw extension does not open the command shell -- but is meant for
programs that use one of the various GUI frameworks, which is probably more
than the new-comer is ready to attack.
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Re: Persistent Error: Python was not found
On 8/15/22, Jonathan Owah wrote: > Thank you so much for your assistance . > > The fault was actually mine: I was running a command > with python3, instead of just python. > python3 works for Mac, but not Windows. If the Python 3.10 store app is installed with all aliases enabled, then "python", "python3", and "python3.10" all work. The standard distribution from python.org, on the other hand, only has a "python" executable. -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
Thank you so much for your assistance . The fault was actually mine: I was running a command with python3, instead of just python. python3 works for Mac, but not Windows. I'm fairly new to Python so I was just following along a tutorial, and I didn't take note of the fact that the command didn't work because the tutorial was done on a MacBook, while I'm using a Windows device. Thanks for your help, Regards On Mon, Aug 15, 2022 at 8:14 AM Eryk Sun wrote: > On 8/13/22, Jonathan Owah wrote: > > > > I've been trying to configure my laptop to run python scripts. > > This is the error I keep getting: > > Python was not found; run without arguments to install from the Microsoft > > Store, or disable this shortcut from Settings > Manage App Execution > > Aliases. > > If you keep seeing this message, then the shell is finding and running > Microsoft's default "python.exe" redirector app execution alias that's > located in "%LocalAppData%\Microsoft\WindowsApps". By default, this > directory is set at the beginning of the user "Path" value in the > registry and thus takes precedence (but not over the system "Path"). > Confirm this by running `where.exe python`. > > An app execution alias is a special type of filesystem symbolic link > to a store app's executable. These aliases are created in a user's > "%LocalAppData%\Microsoft\WindowsApps" directory. Store apps > themselves are usually installed in "%ProgramFiles%\WindowsApps", > which is a system managed directory that even administrators can't > easily modify (and shouldn't modify). Each user on a system has their > own set of installed store apps, even though the apps are installed > only once at the system level. > > By default, Windows creates "python.exe" and "python3.exe" aliases for > the "App Installer" PythonRedirector app. In the alias manager, these > two will be clearly listed as aliases for "App Installer". If you run > this redirector app with one or more command-line arguments, it will > print the above quoted message to the console. If the redirector app > is run without arguments, it will open the Microsoft Store to install > the latest version of the Python store app distribution. Currently > that means Python 3.10. > > In my experience, the app execution alias manager component of Windows > is unreliable. A disabled alias might still exist in > "%LocalAppData%\Microsoft\WindowsApps", or an old alias might be left > in place when an app is installed. Once the real Python store app is > installed, go back into the alias manager and toggle the "python.exe" > and "python3.exe" aliases off and back on. If that doesn't resolve the > problem, manually delete the "python.exe" and "python3.exe" aliases > from "%LocalAppData%\Microsoft\WindowsApps". Then toggle them off and > on again in the alias manager. Hopefully they'll be created to > correctly alias the real Python app instead of the "App Installer" > redirector. > -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
On 8/13/22, Jonathan Owah wrote: > > I've been trying to configure my laptop to run python scripts. > This is the error I keep getting: > Python was not found; run without arguments to install from the Microsoft > Store, or disable this shortcut from Settings > Manage App Execution > Aliases. If you keep seeing this message, then the shell is finding and running Microsoft's default "python.exe" redirector app execution alias that's located in "%LocalAppData%\Microsoft\WindowsApps". By default, this directory is set at the beginning of the user "Path" value in the registry and thus takes precedence (but not over the system "Path"). Confirm this by running `where.exe python`. An app execution alias is a special type of filesystem symbolic link to a store app's executable. These aliases are created in a user's "%LocalAppData%\Microsoft\WindowsApps" directory. Store apps themselves are usually installed in "%ProgramFiles%\WindowsApps", which is a system managed directory that even administrators can't easily modify (and shouldn't modify). Each user on a system has their own set of installed store apps, even though the apps are installed only once at the system level. By default, Windows creates "python.exe" and "python3.exe" aliases for the "App Installer" PythonRedirector app. In the alias manager, these two will be clearly listed as aliases for "App Installer". If you run this redirector app with one or more command-line arguments, it will print the above quoted message to the console. If the redirector app is run without arguments, it will open the Microsoft Store to install the latest version of the Python store app distribution. Currently that means Python 3.10. In my experience, the app execution alias manager component of Windows is unreliable. A disabled alias might still exist in "%LocalAppData%\Microsoft\WindowsApps", or an old alias might be left in place when an app is installed. Once the real Python store app is installed, go back into the alias manager and toggle the "python.exe" and "python3.exe" aliases off and back on. If that doesn't resolve the problem, manually delete the "python.exe" and "python3.exe" aliases from "%LocalAppData%\Microsoft\WindowsApps". Then toggle them off and on again in the alias manager. Hopefully they'll be created to correctly alias the real Python app instead of the "App Installer" redirector. -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
> On 15 Aug 2022, at 04:10, Jonathan Owah wrote: > > Good day, > Great job on making Python easily accessible. Try using the python launcher py.exe. It is documented here https://docs.python.org/3/using/windows.html#python-launcher-for-windows That page documents lots of other things that you may need to know about on windows. Barry > > I'm using a Windows 10, 64gb HP EliteBook. > > I've been trying to configure my laptop to run python scripts. > This is the error I keep getting: > Python was not found; run without arguments to install from the Microsoft > Store, or disable this shortcut from Settings > Manage App Execution > Aliases. > > Everything I've tried has failed. > I've uninstalled and reinstalled > I've added to path, both user and system path,manually and from fresh > installation > I've downloaded from Microsoft Store > I've gone to manage app aliases and switched off > I've used Git Bash, Powershell, cmd > > I'm able to check my python version: 3.10.6. > > I can't do anything else and it's really frustrating. > > I've been at it for days, I don't know what else to do. > > Thanks in advance for your help. > > Regards > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Re: Persistent Error: Python was not found
Jonathan
This is what I would do ...
1. Download Python from python.org not Microsoft
2. Install as an expert or custom install to C:\Python310 rather than
C:\Program files
3. Ignore this point - I was going to mention VirtualEnv which comes
later for software development and thereafter you don't need to put
Python on the Windows path. As I said, ignore this point.
4. Add C:\Python310\Scripts to the path (system or user)
5. Add C:\Python310 to the path after C:\Python310\Scripts
6. Open a cmd prompt and enter python to prove it starts then quit.
Exit the cmd window
7. Create a directory in the root of your user profile
(C:\Users\Jonathan ??) called pythontest
8. Save 'print("hello world")' in a text file called hello.py in the
above directory
9. Open a cmd prompt and type > python
C:\Users\Jonathan\pythontest\hello.py
Should work.
If you want to execute a python script without first opening a cmd
prompt, you need a bat file or shortcut which contains the command line
you want executed. Give that a double-click and it should also work.
If Python is on the path you don't need to specify where it is.
You do need to tell Python what you want it to execute.
It is possible that you can associate .py files with Python but that
would be a step too far for me.
Good luck
M
On 13/08/2022 9:55 pm, Jonathan Owah wrote:
Good day,
Great job on making Python easily accessible.
I'm using a Windows 10, 64gb HP EliteBook.
I've been trying to configure my laptop to run python scripts.
This is the error I keep getting:
Python was not found; run without arguments to install from the Microsoft
Store, or disable this shortcut from Settings > Manage App Execution
Aliases.
Everything I've tried has failed.
I've uninstalled and reinstalled
I've added to path, both user and system path,manually and from fresh
installation
I've downloaded from Microsoft Store
I've gone to manage app aliases and switched off
I've used Git Bash, Powershell, cmd
I'm able to check my python version: 3.10.6.
I can't do anything else and it's really frustrating.
I've been at it for days, I don't know what else to do.
Thanks in advance for your help.
Regards
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Persistent Error: Python was not found
Good day, Great job on making Python easily accessible. I'm using a Windows 10, 64gb HP EliteBook. I've been trying to configure my laptop to run python scripts. This is the error I keep getting: Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases. Everything I've tried has failed. I've uninstalled and reinstalled I've added to path, both user and system path,manually and from fresh installation I've downloaded from Microsoft Store I've gone to manage app aliases and switched off I've used Git Bash, Powershell, cmd I'm able to check my python version: 3.10.6. I can't do anything else and it's really frustrating. I've been at it for days, I don't know what else to do. Thanks in advance for your help. Regards -- https://mail.python.org/mailman/listinfo/python-list
