Time for action – checking the array order

Let's check whether one array is strictly greater than another array:

  1. Call the assert_array_less function with two strictly ordered arrays:
    print "Pass", np.testing.assert_array_less([0, 0.123456789, np.nan], [1, 0.23456780, np.nan])

    The result:

    Pass None
  2. Call the assert_array_less function on failing the test:
    print "Fail", np.testing.assert_array_less([0, 0.123456789,
np.nan], [0, 0.123456780, np.nan])

    An exception is thrown:

    Fail
Traceback (most recent call last):
  ...
raiseAssertionError(msg)
AssertionError:
Arrays are not less-ordered

(mismatch 100.0%)
x: array([ 0.        ,  0.12345679,         nan])
 y: array([ 0.        ,  0.12345678,         nan])

What just happened?

We checked the ordering of two arrays with the assert_array_less function.

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