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Check If A Variable Is Defined Or Not In Python
This is just a little snippet to test if a variable is defined or not in PYTHON.

except NameError:
    // what to do since the variable is not defined
    // what to do if the variable is defined

the problem is that in python pl, there is no specific function to test if a variable is defined or not unlike in PHP where we use the isset() function. Too bad. Anyway the snippet above works just fine, I mean very well.
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