print("len(vec) = {}".format(len(vec)))
print("vec[0] = {}, vec[1] = {}".format(vec[0], vec[1]))
vec2 = Vector([3, 1])
print("{} + {} = {}".format(vec, vec2, vec + vec2))
print("{} - {} = {}".format(vec, vec2, vec - vec2))
#
print("{} * {} = {}".format(vec, 3, vec * 3))
print("{} * {} = {}".format(3, vec, 3 * vec))
#
print("+{} = {}".format(vec, +vec))
print("-{} = {}".format(vec, -vec))
zero2 = Vector.zero(2)
print(zero2)
print("{} + {} = {}".format(vec, zero2, vec + zero2))
print("norm({}) = {}".format(vec, vec.norm()))
print("norm({}) = {}".format(vec2, vec2.norm()))
print("norm({}) = {}".format(zero2, zero2.norm()))
print("normalize {} is {}".format(vec, vec.normalize()))
print(vec.normalize().norm())
print("normalize {} is {}".format(vec2, vec2.normalize()))
print(vec2.normalize().norm())
try:
zero2.normalize()
except ZeroDivisionError:
print("Cannot normalize zero vector {}.".format(zero2))
vec = Vector([5, 2])
print(len(vec))
print("vec[0]={},vec[1]={}".format(vec[0], vec[1]))
vec2 = Vector([3, 1])
print("{}+{}={}".format(vec, vec2, vec + vec2))
print("{}-{}={}".format(vec, vec2, vec - vec2))
print("{}*{}={}".format(vec, 3, vec * 3))
print("{}*{}={}".format(3, vec, 3 * vec))
print("{}".format(vec.__pos__()))
print("{}".format(vec.__neg__()))
zero2 = Vector.zero(2)
print(zero2)
print(vec.norm())
print(vec.normalize())
print(vec.normalize().norm())
print(vec2.normalize().norm())
try:
zero2.normalize()
except ZeroDivisionError:
print('cannot normalize zero vector {}'.format(zero2))
print(vec.dot(vec2))
vec3 = Vector([0, 0])
print("{} == {}?{}".format(zero2, vec3, vec3 == zero2))
print("{} != {}?{}".format(zero2, vec3, vec3 != zero2))
