Debugging broken tests can be very tricky

assert_almost_equal_answer.txt

Can you spot a problem in the code?

np.testing.assert_almost_equal(A, B, decimal=7)

Error log:
-------------------------------------------------------------------------------
AssertionError: 
Arrays are not almost equal to 7 decimals

(mismatch 18.75%)
 x: array([[ -3.7830681e-01,   9.2375589e-01,  -5.9657533e-02,   0.0000000e+00],
       [ -4.5748650e-01,  -2.4260328e-01,  -8.5548218e-01,   0.0000000e+00],
       [ -8.0472981e-01,  -2.9634221e-01,   5.1438432e-01,   0.0000000e+00],
       [ -2.1066381e+05,   3.0747290e+05,  -6.3619737e+06,   1.0000000e+00]])
 y: array([[ -3.7830681e-01,   9.2375589e-01,  -5.9657533e-02,   0.0000000e+00],
       [ -4.5748650e-01,  -2.4260328e-01,  -8.5548218e-01,   0.0000000e+00],
       [ -8.0472981e-01,  -2.9634221e-01,   5.1438432e-01,   0.0000000e+00],
       [ -2.1066381e+05,   3.0747290e+05,  -6.3619737e+06,   1.0000000e+00]])
-------------------------------------------------------------------------------

What about now?

np.set_printoptions(suppress=True)
np.testing.assert_almost_equal(A, B, decimal=7)

Error log:
-------------------------------------------------------------------------------
AssertionError: 
Arrays are not almost equal to 7 decimals

(mismatch 18.75%)
 x: array([[      -0.3783068,        0.9237559,       -0.0596575,        0.       ],
       [      -0.4574865,       -0.2426033,       -0.8554822,        0.       ],
       [      -0.8047298,       -0.2963422,        0.5143843,        0.       ],
       [ -210663.8053348,   307472.8990574, -6361973.6501733,        1.       ]])
 y: array([[      -0.3783068,        0.9237559,       -0.0596575,        0.       ],
       [      -0.4574865,       -0.2426033,       -0.8554822,        0.       ],
       [      -0.8047298,       -0.2963422,        0.5143843,        0.       ],
       [ -210663.805    ,   307472.899    , -6361973.65     ,        1.       ]])

assert_almost_equal_question.txt

Can you spot a problem in the code?

np.testing.assert_almost_equal(A, B, decimal=7)

Error log:
-------------------------------------------------------------------------------
AssertionError: 
Arrays are not almost equal to 7 decimals

(mismatch 18.75%)
 x: array([[ -3.7830681e-01,   9.2375589e-01,  -5.9657533e-02,   0.0000000e+00],
       [ -4.5748650e-01,  -2.4260328e-01,  -8.5548218e-01,   0.0000000e+00],
       [ -8.0472981e-01,  -2.9634221e-01,   5.1438432e-01,   0.0000000e+00],
       [ -2.1066381e+05,   3.0747290e+05,  -6.3619737e+06,   1.0000000e+00]])
 y: array([[ -3.7830681e-01,   9.2375589e-01,  -5.9657533e-02,   0.0000000e+00],
       [ -4.5748650e-01,  -2.4260328e-01,  -8.5548218e-01,   0.0000000e+00],
       [ -8.0472981e-01,  -2.9634221e-01,   5.1438432e-01,   0.0000000e+00],
       [ -2.1066381e+05,   3.0747290e+05,  -6.3619737e+06,   1.0000000e+00]])
--------------------------------------------------------------------------------

The answer https://goo.gl/z6dY5H