[TIP] why do you use py.test?

[Phlip]

Herman Sheremetyev wrote:

> I've seen a lot of messages on this list of people mentioning they use
> py.test, so I'm curious what advantages it offers. I gave it a try and
> immediately noticed it was literally 10x slower than nose

I have not auditioned nose yet or figured out what was its point.

I use the assert handler in test.py. Given...

  assert x == 42

...the diagnostic will reflect the entire expression and all its
intermediate values. (Like my assert{ 2.0 }, and Wrong, for Ruby.}

That means I can do away with self.assertEqual() and all its ilk. I
can make an assertion out of any kind of statement, without worrying
its diagnostic will be unreadable.

All assertions should do this, and all languages should support it.