I am writing a GUI program in Tkinter which allows the user to enter in different parameters specifying an ellipse segment. Then, he/she presses a button and the ellipse segment is plotted, using matplotlib. Here is the code (inside a class, but logically stands alone) that does this:

Code:
aa = DataArray(self.file0)  #Retrieve data sets
bb = DataArray(self.file1)  #Not used right now
cc = DataArray(self.file2)
...