[Zope3-dev] Bytes versus ASCII

Gary Poster gary at zope.com
Fri Feb 3 09:40:32 EST 2006

On Feb 3, 2006, at 4:00 AM, Egon Frerich wrote:

> Hash: SHA1
> Gary Poster schrieb am 27.01.2006 21:40:
>> On Jan 27, 2006, at 5:16 AM, Christian Theune wrote:
>>> Hi,
>>> (this is about zope.schema)
>>> I assumed that the fields Bytes and ASCII have some distinction. The
>>> ASCII field explicitly checks for every character to have an ordinal
>>> value lower than 127.
>>> Bytes however does a cast in fromUnicode(u) that does str(u).  
>>> This  will
>>> break if there are non-ascii characters in the unicode string.
>>> Effectively this makes it an ASCII field as well.
>>> However, I don't know enough about the environment, so eventually  
>>> this
>>> is all good. When does the fromUnicode method get called?  
>>> Everytime I
>>> use this field through zope.app.form or zope.formlib?
>> I think it might be leveraged elsewhere, but the big client AFAIK  
>> is  zcml.
> But zcml needs two types:
> - - unicode for title and description parameters (what is not the  
> case in
> the actual version)
> - - bytes elsewere.

Hi Egon.  I'm not sure I followed your message, but to clarify my  
statement, I meant that the big client for the `fromUnicode` method  
(of all schema fields) is zcml, though I'm pretty sure that it is  
also used elsewhere.  I was not talking about any field specifically.


More information about the Zope3-dev mailing list