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Wed May 4 21:28:23 CEST 2005 · https://mail.python.org/pipermail/python-dev/2005-May/053347.html

Noam Raphael wrote:
> On 5/4/05, Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:
>> 
>> There is one problem with using no keyword: You cannot use arbitrary expressions
>> in the new statement. Consider:
>> 
>> resource = opening("file.txt")
>> block resource:
>>     (...)
>> 
>> resource = opening("file.txt")
>> resource:
>>     (...)
>> 
>> The latter would have to be forbidden.
> 
> Can you explain why it would have to be forbidden please?

Well, with it you could create suites with _any_ introducing
identifier. Consider:

with:
    (...)

synchronized:
    (...)

try:
    (...)

transaction:
    (...)

Do you understand my concern? It would be very, very hard to discern
these "user-defined statements" from real language constructs.

Reinhold

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[Python-Dev] PEP 340 -- loose ends