def getMatrixKeys(prefix=''):
 matrixKeys = []
 for row in xrange(4):
  for column in xrange(4):
   key = getMatrixKey(row, column, prefix)
   matrixKeys.append(key)
 return matrixKeys

def getMatrixKeys ( prefix = '' ) : matrixKeys = [ ] for row in xrange ( 4 ) : for column in xrange ( 4 ) : key = getMatrixKey ( row , column , prefix ) matrixKeys . append ( key ) return matrixKeys
get the matrix keys .