Reading File Into 2D List

[alex.hanga at gmail.com]

Hello!

I'm new here and fairly new to Python. I am attempting to read a data file into python and adding it to a 2D list to make it easy to use further down the line.

My data file is just 7 numbers in a row seperated by commas and each bulk of data is seperated by the sign @ to indicate that the data from this point on should be stored into a new part of the 2D list. 

1,1,1,1,1,1,1
2,2,2,2,2,2,2
@
3,3,3,3,3,3,3
4,4,4,4,4,4,4

After reading the file, the way I imagine the data to be shown would be in this manner:

data[0][0] = (1,1,1,1,1,1,1)
data[0][1] = (2,2,2,2,2,2,2)
data[1][0] = (3,3,3,3,3,3,3)
data[1][1] = (4,4,4,4,4,4,4)

This way it will be easy to loop across the data when I use it in Blender.

My code looks like this;

------------------------------
object_data = []
object_data.append([])

for rows in data.splitlines():
    elems = rows.split(',')
    if elems[0] != "@": 
       object_data[i].append((float(elems[0]),float(elems[1]),
       float(elems[2]),float(elems[3]),float(elems[4]),
       float(elems[5]),int(elems[6])))
    else:

        **start on object_data[1][j] and loop over it all again**
-------------------------------

I could really use some help as to how I would force my code to not start on object_data[0] on the next iteration in the for loop, but rather on object_data[1]. I'm an avid Matlab user so I imagined this to be done simply by setting i=i+1 in the else part, however this does not work as it complains about the list being out of bounds.

Any help is really appreciated!