def test_pmf_hist_widths():
 (x, h, w) = utils.pmf_hist(a_norm)
 assert_equal((x[1] - x[0]), w)

def test_pmf_hist_widths ( ) : ( x , h , w ) = utils . pmf_hist ( a_norm ) assert_equal ( ( x [ 1 ] - x [ 0 ] ) , w )
test histogram width is correct .