Author terry.reedy
Recipients Grissiom.Gu, cvrebert, sbt, terry.reedy
Date 2012-07-27.22:15:27
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Richard is correct. From Popen Constructor
"If env is not None, it must be a mapping that defines the environment variables for the new process; these are used instead of inheriting the current process’ environment, which is the default behavior." 
(followed by Window note about SystemRoot.)

The paragraph about shell=True in Frequently Used Arguments suggests that that might work (but see warning).
Date User Action Args
2012-07-27 22:15:28terry.reedysetrecipients: + terry.reedy, cvrebert, sbt, Grissiom.Gu
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