title: identify x,y coordinate pair in a python x,y array
body: <p>how can i identify the presence or absence of a pair of coordinates (x1,y1) in an array of many coordinates? eg in a sort of code:</p>
  
  <pre><code>myCoord = [1,2]
  
  someCoords1 = [[2,3][4,5][1,2][6,7]]
  someCoords2 = [[2,3][4,5][8,9][6,7]]
  
  myCoord in someCoords1
  True
  
  myCoord in someCoords2
  False
  </code></pre>
  
  <p>I have been experimenting with any() but can't get the syntax right or it's not the correct method. 
  thanks</p>