'Specify the value of the PATH-style environment variable.
"value" is the appropriate environment variable value, e.g.:
"C:     rentm\mylib;C:\shared\lib-python". If value is None then
the value will be retrieved from os.environ.
This will lazily be called if necessary.'

def setEnvPath(self, value=None):

    path = []
    if (value is None):
        if self.PATH_ENV_VAR:
            path = os.environ.get(self.PATH_ENV_VAR, '').split(os.pathsep)
    else:
        path = value.split(os.pathsep)
    self.envPath = path
