Ah, a simple concept. Good. :)
I'm already familiar in working with lists.

Here's a case of a simple two-dimensional array (the simplest  
possible), ran in the IDLE interpreter:

>>> array = [["1.1", "1.2"], ["2.1", "2.2"]]
>>> array[1[2]]

Traceback (most recent call last):
   File "<pyshell#22>", line 1, in <module>
     array[1[2]]
TypeError: 'int' object is unsubscriptable
>>> array[1]
['2.1', '2.2']
>>> second_half = array[1]
>>> second_half[1]
'2.2'

When I nest the slices ( array[1[2]] ) I get that error message. When  
I define one variable as an index value of the array, and then  
index-value that, it works fine.

What's the deal?

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