Python/Numpy reshaping 2D array into 3D array based on first column value

Question

I have a text file that i am reading in as follows:

logic_blocks = map(str.split, logic_blk_file);

And essentially this file has the columns as such:

Circuit #, Logic Type, etc.etc.

Where I want to create a 3D array. The first index should be Circuit #, the second index is the row or text file line and the third is the item within the text file line.

I want the first index to obviously be the circuit #, so an arbitrary reshape will not work. It will need to be based on the Circuit # value.

I can do this with for loops but is there a way to avoid them?

Thanks!