Extracting specific columns in numpy array

This is an easy question but say I have an MxN matrix. All I want to do is extract specific columns and store them in another numpy array but I get invalid syntax errors.
Here is the code:

extractedData = data[[:,1],[:,9]]. 

It seems like the above line should suffice but I guess not. I looked around but couldn’t find anything syntax wise regarding this specific scenario.

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