Eryk Sun <eryk...@gmail.com> added the comment:
> the Open With entries may not be being merged.
That would probably be a bug in the Windows shell API. The HKCU and HKLM
subkeys of "Software\Classes\Python.File\Shell\editwithidle\shell" are merged
in the HKCR view. The same key path can exist in both hives, for which the view
contains the union, with precedence for HKCU.
For example, with "Software\Classes\spam":
import winreg
hkm = winreg.CreateKey(winreg.HKEY_LOCAL_MACHINE, r'Software\Classes\spam')
winreg.SetValueEx(hkm, 'eggs', 0, winreg.REG_SZ, 'hklm')
winreg.SetValueEx(hkm, 'baz', 0, winreg.REG_SZ, 'hklm')
hku = winreg.CreateKey(winreg.HKEY_CURRENT_USER, r'Software\Classes\spam')
winreg.SetValueEx(hku, 'eggs', 0, winreg.REG_SZ, 'hkcu')
winreg.SetValueEx(hku, 'bam', 0, winreg.REG_SZ, 'hkcu')
hkr = winreg.OpenKey(winreg.HKEY_CLASSES_ROOT, 'spam')
>>> winreg.EnumValue(hkr, 0)
('bam', 'hkcu', 1)
>>> winreg.EnumValue(hkr, 1)
('baz', 'hklm', 1)
>>> winreg.EnumValue(hkr, 2)
('eggs', 'hkcu', 1)
>>> winreg.EnumValue(hkr, 3)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: [WinError 259] No more data is available
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<https://bugs.python.org/issue46594>
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