[Python-3000] PEP 3137 plan of attack

[Guido van Rossum]

On 10/9/07, Thomas Lee <tom at vector-seven.com> wrote:
> Thomas Lee wrote:
> > Guido van Rossum wrote:
> >
> >> - make == and != between PyBytes and PyUnicode return False instead of
> >> raising TypeError
> >>
> A patch for this is ready. I'll submit it to the bug tracker later tonight.
> >> - make == and != between PyString and Pyunicode return False instead
> >> of converting
> >>
> This will be trivial, but I need to ask a stupid question: is this also
> true for PyUnicode_Compare? (i.e. should PyUnicode_Compare(str8(),
> str()) != 0 ?)
>
> And, if so, what should PyUnicode_Compare actually return if one of the
> parameters is a PyString? Maybe -1 for PyUnicode on the left, 1 for
> PyUnicode on the right?

Assuming that PyUnicode_Compare is a three-way comparison (less,
equal, more), it should raise a TypeError when one of the arguments is
a PyString or PyBytes.

> >> - make comparisons between PyString and PyBytes work (these are
> >> properly ordered)
> >>
> >>
> Is it just me, or do string/bytes comparisons already work?
>
>  >>> s = str8('test')
>  >>> b = b'test'
>  >>> s == b
> True
>  >>> b == s
> True
>  >>> s != b
> False
>  >>> b != s
> False

Seems it's already so. Do they order properly too? (< <= > >=)

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)