Python _eval_interval примеры использования

Пример #1

Файл: test_expr.py Проект: Botouls/sympy

def test_issue_1100():
    # first subs and limit gives NaN
    a = x / y
    assert a._eval_interval(x, 0, oo)._eval_interval(y, oo, 0) is S.NaN
    # second subs and limit gives NaN
    assert a._eval_interval(x, 0, oo)._eval_interval(y, 0, oo) is S.NaN
    # difference gives S.NaN
    a = x - y
    assert a._eval_interval(x, 1, oo)._eval_interval(y, oo, 1) is S.NaN
    raises(ValueError, "x._eval_interval(x, None, None)")

Пример #2

def test_issue_1100():
    # first subs and limit gives NaN
    a = x / y
    assert a._eval_interval(x, 0, oo)._eval_interval(y, oo, 0) is S.NaN
    # second subs and limit gives NaN
    assert a._eval_interval(x, 0, oo)._eval_interval(y, 0, oo) is S.NaN
    # difference gives S.NaN
    a = x - y
    assert a._eval_interval(x, 1, oo)._eval_interval(y, oo, 1) is S.NaN
    raises(ValueError, 'x._eval_interval(x, None, None)')