classmethod lambda Python -

I have a hard time understanding this piece of code. I understand that to save the time of testing, Instead of the end point, some are using fake.

I do not understand that Klassemp (Lambda CLS: Self Preprop) is the structure. What does the use of Lambda CLS mean if I do not use all the CLS inside the code?

I hope that I am quite clear, I would be very happy if someone can put a light this one ..

Thanks a lot

  @patch ("paypaladaptive.api.endpoints.UrlRequest", MockUrlRequestPreapproval) def test_preapproval (self):. # I do not understand this code, it is very confusing self.assertTrue (self.preapproval.process (why: why do I use a lambda structure if I code myself in the code (self.preapproval) MockUrlRequestPreapproval .preapproval = (self.preapproval) need to not use classmethod (lambda CLS)) self.preapproval = Preapproval.objects.get (p = self.preapproval.pk) self.assertNotEqual (self.preapproval.preapproval_key, "") Self.assertEqual (self.preapproval.status, "created")  

'First argument should be such a task, in which one Be Rk or more. There will be an error in making any call to this:

  classmethod (self.preapproval) # Not a function classmethod (lambda: self.preapproval) # Need a logic  < / Pre> 
 This works, but it is very verbose: 
 
  def get_preapproval (CLS): self.preapproval classmethod (get_preapproval) returned  
 < P> This is the reason that the code uses Lambda 
 
 A small maybe this correction can be done:. 
 
  classmethod (lambda _: self.preapproval)  
 
 It makes it clear that logic is not required.