Retrieve ext. variables in python program

[alfa1234]

Trying to convert TCL code to python.

Have a property file from where I read some VAR's. Looks like this:
EARPROJECT = sgs-procDist
APPNAME = SGSProcedure


In my TCL code I confirm the existence of the VAR = f.ex EARPROJECT by
using code:

if { ([info exists APPNAME] && [info exists STAGEDIR] && [info exists
EARPROJECT] && [info exists EARDESTINATION]) } {


Does anyone know and equalent way to confirm a Variable from the same
property file using PYTHON code ???