def test_dict_set(): a, b = map(Wild, 'ab') f = 3 * cos(4 * x) r = f.match(a * cos(b * x)) assert r == {a: 3, b: 4} e = a / b * sin(b * x) assert e.subs(r) == r[a] / r[b] * sin(r[b] * x) assert e.subs(r) == 3 * sin(4 * x) / 4 s = set(r.items()) assert e.subs(s) == r[a] / r[b] * sin(r[b] * x) assert e.subs(s) == 3 * sin(4 * x) / 4 assert e.subs(r) == r[a] / r[b] * sin(r[b] * x) assert e.subs(r) == 3 * sin(4 * x) / 4 assert x.subs(Dict((x, 1))) == 1
def test_dict_set(): a, b, c = map(Wild, 'abc') f = 3*cos(4*x) r = f.match(a*cos(b*x)) assert r == {a: 3, b: 4} e = a/b*sin(b*x) assert e.subs(r) == r[a]/r[b]*sin(r[b]*x) assert e.subs(r) == 3*sin(4*x) / 4 s = set(r.items()) assert e.subs(s) == r[a]/r[b]*sin(r[b]*x) assert e.subs(s) == 3*sin(4*x) / 4 assert e.subs(r) == r[a]/r[b]*sin(r[b]*x) assert e.subs(r) == 3*sin(4*x) / 4 assert x.subs(Dict((x, 1))) == 1
def test_subs_iter(): assert x.subs(reversed([[x, y]])) == y it = iter([[x, y]]) assert x.subs(it) == y assert x.subs(Tuple((x, y))) == y
def test_subs_iter(): assert x.subs(reversed([[x, y]])) == y it = iter([[x, y]]) assert x.subs(it) == y assert x.subs(Tuple((x, y))) == y