Environment data

VS Code version: 1.18.1
Python Extension version: 0.8.0
Python Version: python 3.6.3 64-bit & python 2.7.14 64-bit
OS and version: Windows 10.0.16299.64

Actual behavior

Expected behavior

Steps to reproduce:

Here is my exploration by debugging this extension myself:
The extension cannot find 64-bit python installation via WindowsRegistryService class which implements interface IInterpreterLocatorService
the code is here: windowsRegistryService.ts
In short, this class find python installation via predefined registry path, it does resolved the correct registry path: \Software\Python\PythonCore\2.7\InstallPath and \Software\Python\PythonCore\2.7\InstallPath, but due to the is64Bit member of the class set to false in constructor, it cannot find anything in the 32-bit(?) registry.
After manualy changing this.is64Bit member of WindowsRegistryService to true in the debugger, the class can correctly find both of the 2 python interpreters, and tagged it as 64-bit.

Looking at the constructor, the is64Bit parameter is injected by some other mechanism, which I cannot understand by looking at the code, can anyone explain it?

for now, the interpreter locator falls back to find python via PATH and returns only 1 python.exe