Hi,

I want to do the following kind of test :

I ask students to write a class for Vector2D with 2 methods : one to add another vector and another one to multiply with a number (plus a constructor and a __str__ method).

So the good answer must be :

class Vecteur2D: def __init__(self,x,y): self.x = x self.y = y def __str__(self): return "[" + str(self.x) + "," + str(self.y) + "]" def multScalaire(self,s): self.x = self.x * s self.y = self.y * s def addVecteur(self,v): self.x = self.x + v.x self.y = self.y + v.yI want to give some points to students who manage to write the

*__init__*and

*__str__*methods, even if they can't write the

*multScalaire*and

*addVecteur*methods.

So, I configure my question like this :

and

and the same for 3 more tests :

the second one with only the *multScalaire *method

v1 = Vecteur2D(7,3)

v1.multScalaire(8)

print(v1)

the third one with the *addVecteur *method and the last one with all the methods.

When I test this question, if I answer with all but the *multScalaire *method, the first AND the third one should be OK but I get this :

Why does the second test (with *multScalaire *method) block the execution of the third test (which should be OK and add some points to the student)?

Best regards,

Philippe