[Tutor] how to monitor if their data in a variable/object

[Amit Sethi]

Hi , I am writing a python gtk application in which I am required to
fetch a large amount of data from web , now i want to create a wait
dialog for the user to know that I am still fetching data .The
question is how can i monitor that the required data has been fetched
. I could have a variable that is given a particular value when data
has been fetched . But how can I   keep checking if the variable has
got a value or not.

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