dict.has_key(x) versus 'x in dict'

[Roel Schroeven]

Roel Schroeven schreef:
> Have you never experienced the following:
> 
> A customer reports a bug. Upon investaging you find the source of the 
> problem, but from studying the code you don't understand anymore how it 
> has ever been able to function correctly. From that moment, it indeed 
> stops working even on computers where it always have worked correctly.
> 
> You fix the bug and all is well again.
> 
> Very strange, but it has happened to me on a few occasions. There's 
> probably a perfectly logical explanation for what happened, but I never 
> found it.

BTW this is known as a Schroedinbug.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven