[Python] Does `anaconda` create a separate PYTHONPATH variable for each new environment?

I am starting to work with the Python Anaconda distribution from Continuum.io to do scipy work.
I have been able to get Anaconda up and running, but I cannot tell whether Anaconda creates a new PYTHONPATH environment variable for each new environment it creates, or whether it relies on the common system PYTHONPATH.

I could not find any information on this in the documentation.

Further, when I did a printenv, I did not see a PYTHONPATH variable in the newly created environment --though I did find a few new anaconda created environment variables.

The best I can find is that Anaconda added some Anaconda directories and the new environment directory to the head of PATH variable --but this does not necessarily isolate the new package from the system environment but it is close.

Does anyone know the answer to this question or found a way to deal with this concern?

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