On 18/06/2019 22:38, Tim Roberts wrote:
David Hughes wrote:
I'm in the process of upgrading my software from Python 2.7 to 3.7
now that wxPython has been migrated to 3. As part of a procedure for
upgrading an end user's own installation I check for it's location
via the desktop shortcut that Innosetup created during the original
installation.
That's not a particularly good method in the general case. I don't
find much use for the desktop icon, so I suppress it. You might be
better served to use the registry, in
HKEY_LOCAL_MACHINE\Software\Python\PythonCore. 32-bit installations
will be in HKEY_LOCAL_MACHINE\Software\WOW6432Node\Python\PythonCore
(if you're reading from a 64-bit app).
My apologies, I should have made it clear the shortcut is to the
stand-alone executable (py2exe/PyInstaller) version of my own software.
I have a procedure for doing this that worked/works fine with Python
2.7 that is very similar to the one published in
/http://timgolden.me.uk/python/win32_how_do_i/read-a-shortcut.html/.
Neither mine nor Tim's works under Python 3.7 (I haven't checked any
other version of 3). With Tim's version, when the line
name, _ = link.GetPath (shell.SLGP_UNCPRIORITY)
is executed, after a delay it responds with /aborted (disconnected)/
and the program terminates, as does mine.
Is it possible you have installed a 32-bit Python on a 64-bit system?
Theoretically, you should be able to use CLSID_ShellLink from either
one, but I'm trying to narrow things down. Tim's code works fine for
me with Python 3.7.2 (64 bit) on Windows 10.
The problem first arose in a 32 bit Python installed on a 64 bit Windows
10 but the same error also occurs with 64 bit Python. However, both of
these are virtual environments installed using venv. When I tried Tim's
program using the original system-installed Pythons both the 32 and 64
bit versions of 3.7 work fine.
Aha! To make the system-installed Pythons work I had to pip install
pywin32 and this installed version 224. Both the virtual environments
contained pywin32 version 223. After upgrading to version 224 both now
work! :))
--
Regards
David Hughes
Forestfield Software
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