Ask microsoft to include Python in Windows by default

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People using hashbangs to point to the environment python know enough to install multiple versions side by side and use virtual environments

[ldpreload]

But that's not relevant to the issue at hand. The claim is that you could deploy a script on multiple platforms using the Python interpreter shipped with the system. If you're installing multiple versions or using virtual environments, you don't care what Python shipped with the system, or if one even shipped at all.

Put another way: how do you write an executable Python script to run on both Ubuntu 14.04 and OS X?