another bug report:

> pulumi up
Previewing update (aks):

     Type                 Name                     Plan     Info
     pulumi:pulumi:Stack  azure-py-kubernetes-aks           1 error

Diagnostics:
  pulumi:pulumi:Stack (azure-py-kubernetes-aks):
    error: Failed to locate 'python3' on your PATH. Have you installed Python 3.6 or greater?

error: an error occurred while advancing the preview
C:\_\pulumi-examples\azure-py-availability-set [master ≡ +2 ~0 -0 !]
> python
Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 23 2018, 23:31:17) [MSC v.1916 32 bit (Intel)] on win32
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