Python-based RPN Evaluator

This program evaluates logic expressions out of a textfile with Reveresed Polish Notation (RPN) syntax.

Example world file:
wind
/sun
/rain
red

wind and red have the value of 1, sun and rain 0 since they are prefixed by "/".
Here's the syntax to run the program: "python log.py myworld.world".
It quits when an empty expression occurs.

Example usage:
C:\Python26>python log.py myworld.world
Logical Expression: rain sun &
0
Logical Expression: sun red |
1
Logical Expression: sun wind ^
True
Logical Expression: winter sun &
*** Error while evaluating: Bad name: 'winter'.
Logical Expression: sun red
*** Error while evaluating: Unbalanced expression: 'sun red'.
Logical Expression: sun red red |
*** Error while evaluating: Unbalanced expression: 'sun red red |'.
Logical Expression:

C:\Python26>



Find the source code here.

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