def test_pmf_hist_bins():
 (x, h, w) = utils.pmf_hist(a_norm, 20)
 assert_equal(len(x), 20)

def test_pmf_hist_bins ( ) : ( x , h , w ) = utils . pmf_hist ( a_norm , 20 ) assert_equal ( len ( x ) , 20 )
test bin specification .