title: What double nested brackets means in python numpy array when it is printed?
body: <p>I have screenshot of python code:</p>
  
  <p><a href="https://i.stack.imgur.com/5z50M.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5z50M.png" alt="enter image description here"></a></p>
  
  <p>Is X row vector or one dimensional vector or just numpy array with no dimension?</p>
  
  <p>Is X2 column vector or 2 dimensional matrix? Does the the two nested brackets in X2 output means it is 2 dimensional matrix and if so how do I change it to column vector with single bracket when it is printed like the output of X?</p>