test_formatters.py 文件源码

def test_precision():
    """test various values for float_precision."""
    f = PlainTextFormatter()
    nt.assert_equal(f(pi), repr(pi))
    f.float_precision = 0
    if numpy:
        po = numpy.get_printoptions()
        nt.assert_equal(po['precision'], 0)
    nt.assert_equal(f(pi), '3')
    f.float_precision = 2
    if numpy:
        po = numpy.get_printoptions()
        nt.assert_equal(po['precision'], 2)
    nt.assert_equal(f(pi), '3.14')
    f.float_precision = '%g'
    if numpy:
        po = numpy.get_printoptions()
        nt.assert_equal(po['precision'], 2)
    nt.assert_equal(f(pi), '3.14159')
    f.float_precision = '%e'
    nt.assert_equal(f(pi), '3.141593e+00')
    f.float_precision = ''
    if numpy:
        po = numpy.get_printoptions()
        nt.assert_equal(po['precision'], 8)
    nt.assert_equal(f(pi), repr(pi))