@staticmethod<EOL><INDENT>def _neighbors(coordinate, radius):<DEDENT>
ranges = (xrange(n-radius, n+radius+<NUM_LIT:1>) for n in coordinate.tolist())<EOL>return numpy.array(list(itertools.product(*ranges)))<EOL>
Returns coordinates around given coordinate, within given radius.
Includes given coordinate.

@param coordinate (numpy.array) N-dimensional integer coordinate
@param radius (int) Radius around `coordinate`

@return (numpy.array) List of coordinates