curriculum/challenges/english/blocks/learn-special-methods-by-building-a-vector-space/65f93d4647ce2670dc6f095c.md
The __repr__ method is called under the hood by the repr function. Verify that __repr__ works properly by adding f'\nrepr = {repr(v1)}' and f'\nrepr = {repr(v2)}' as the second argument to your first and second print calls, respectively.
You should add f'\nrepr = {repr(v1)}' as the second argument to your print(f'v1 = {v1}') call.
({ test: () => assert(runPython(`_Node(_code).has_call("print(f'v1 = {v1}', f'\\\\nrepr = {repr(v1)}')")`)) })
You should add f'\nrepr = {repr(v2)}' as the second argument to your print(f'v2 = {v2}') call.
({ test: () => assert(runPython(`_Node(_code).has_call("print(f'v2 = {v2}', f'\\\\nrepr = {repr(v2)}')")`)) })
class R2Vector:
def __init__(self, *, x, y):
self.x = x
self.y = y
def norm(self):
return sum(val**2 for val in vars(self).values())**0.5
def __str__(self):
return str(tuple(getattr(self, i) for i in vars(self)))
def __repr__(self):
arg_list = [f'{key}={val}' for key, val in vars(self).items()]
args = ', '.join(arg_list)
return f'{self.__class__.__name__}({args})'
class R3Vector(R2Vector):
def __init__(self, *, x, y, z):
super().__init__(x=x, y=y)
self.z = z
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v1 = R2Vector(x=2, y=3)
v2 = R3Vector(x=2, y=2, z=3)
print(f'v1 = {v1}')
print(f'v2 = {v2}')
--fcc-editable-region--