def test_fixed(self):
p = poly.Polynomial([1 / 2])
assert_equal(str(p), '0.5')
with printoptions(floatmode='fixed'):
assert_equal(str(p), '0.50000000')
with printoptions(floatmode='fixed', precision=4):
assert_equal(str(p), '0.5000')
def test_linewidth_printoption(self, lw, tgt):
p = poly.Polynomial(
[0, 10, 200, 3000, 40000, 500000, 600000, 70000, 8000, 900])
with printoptions(linewidth=lw):
assert_equal(str(p), tgt)
for line in str(p).split('\n'):
assert_(len(line) < lw)
def test_non_finite(self):
p = poly.Polynomial([nan, inf])
assert str(p) == 'nan + inf x'
assert p._repr_latex_() == r'$x \mapsto \text{nan} + \text{inf}\,x$'
with printoptions(nanstr='NAN', infstr='INF'):
assert str(p) == 'NAN + INF x'
assert p._repr_latex_() == \
r'$x \mapsto \text{NAN} + \text{INF}\,x$'
def test_str(self):
p = poly.Polynomial([1 / 2, 1 / 7, 1 / 7 * 10**8, 1 / 7 * 10**9])
assert_equal(
str(p), '0.5 + 0.14285714 x + 14285714.28571429 x**2 '
'+ (1.42857143e+08) x**3')
with printoptions(precision=3):
assert_equal(
str(p), '0.5 + 0.143 x + 14285714.286 x**2 '
'+ (1.429e+08) x**3')
def test_latex(self):
p = poly.Polynomial([1 / 2, 1 / 7, 1 / 7 * 10**8, 1 / 7 * 10**9])
assert_equal(
p._repr_latex_(),
r'$x \mapsto \text{0.5} + \text{0.14285714}\,x + '
r'\text{14285714.28571429}\,x^{2} + '
r'\text{(1.42857143e+08)}\,x^{3}$')
with printoptions(precision=3):
assert_equal(
p._repr_latex_(), r'$x \mapsto \text{0.5} + \text{0.143}\,x + '
r'\text{14285714.286}\,x^{2} + \text{(1.429e+08)}\,x^{3}$')
def test_switch_to_exp(self):
for i, s in enumerate(SWITCH_TO_EXP):
with printoptions(precision=i):
p = poly.Polynomial(
[1.23456789 * 10**-i for i in range(i // 2 + 3)])
assert str(p).replace('\n', ' ') == s