Tell me the truth

[Duncan Booth]

francois.petitjean at bureauveritas.com wrote:

> After much head scrating and experimenting with dis.dis() I have found
> that chaining comparisons (with is or ==)  a == b == c in Python is
> never a good idea. It is interpreted as
>  ( a == b ) and ( b == c)
> Such a magic is fine  when we write:
>  if  0.0 <= x < 1.0:
> but it renders the outcome of  if a == b == c: somewhat confusing.

I don't understand why it is confusing. What other meaning would you 
expect?