VS2015.3/PTVS Python Tools no longer working? - python-2.7

Question

strong textI reinstalled VS 2015 Update 3 (from Web install) w/Python Tools, but Python Tools don't seem to work anymore. From ActivityLog.xml, the error is:
<record>494</record>
<time>2016/07/04 15:59:16.031</time>
<type>Error</type>
<source>VisualStudio</source>
<description>LegacySitePackage failed for package [Python Tools
Package]Source:
&apos;Microsoft.VisualStudio.Composition&apos;
Description: Expected 1 export(s) with contract name
"Microsoft.PythonTools.Interpreter.IInterpreterOptionsService"
but found 0 after applying applicable constraints.
#x000D;
Microsoft.VisualStudio.Composition.CompositionFailedException:
Expected 1 export(s) with contract name
"Microsoft.PythonTools.Interpreter.IInterpreterOptionsService"
but found 0 after applying applicable constraints.
Microsoft.VisualStudio.Composition.ExportProvider.GetExports
(ImportDefinition importDefinition)
at
Microsoft.VisualStudio.Composition.ExportProvider.GetExports
[T,TMetadataView](String contractName, ImportCardinality
cardinality)
at
Microsoft.VisualStudio.Composition.ExportProvider.GetExport
[T,TMetadataView] (String contractName)
at
Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T]
(String contractName)
at
Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T]
()
at
Microsoft.VisualStudio.Composition.ExportProvider.GetExportedValue
[T] ()
at
Microsoft.VisualStudio.ComponentModelHost.ComponentModel.GetService
[T] ()
at
Microsoft.PythonTools.PythonToolsService..ctor(IServiceContainer
container)
at
Microsoft.PythonTools.PythonToolsPackage.Initialize()
at
Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.
Interop.IVs Package.SetSite(IServiceProvider sp)</description>
<guid>{6DBD7C1E-1F1B-496D-AC7C-C55DAE66C783}</guid>
<hr>80131500</hr> <errorinfo></errorinfo>
I de-installed/re-installed VS 2015 Python support (directly from PTVS 2.2.4 VS 2015.msi). Same error.
What to do? The Machine (Win 10) has Python 2.7/x64 in PATH.
There seems to be a real problem for other too. See here:
Visual Studio Python Environments window does not display
Interestingly, I have two similar dev machines (Win10/x64), both installed recently, both have VS 2013Pro + VS2015 Community installed. On one box, everything works fine, on the other: see above.

Answer 1

Had the same issue.
Visual Studio 2015 Update 3, PTVS 2.2.4
Resolved it by:
Closing VS
Clearing the content of C:\Users\YOUR_USERNAME\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache folder. * notice the YOUR_USERNAME and replace it with your actual username to get the local path.
Relaunching VS.
Hope this helps

Answer 2

Delete the contents from the following folders:
C:\Users{user}\AppData\Local\Microsoft\VisualStudio
C:\Users{user}\AppData\Local\Microsoft\VSCommon
and run Visual Studio 2015 again:
[x64] C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE
[x86] C:\Program Files\Microsoft Visual Studio 14.0\Common7\IDE

Answer 3

It seems like they fixed these issues in PTVS 2.2.5: github.com/Microsoft/PTVS/issues/1411 and github.com/Microsoft/PTVS/issues/1415

Answer 4

Control Panel/Uninstall change
Select VS2015, click change
Once the dialog builds, select modify, then select Python tools.
Done.