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Mon Feb 20 02:03:15 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-February/061465.html

>>         @cmdloop.aliases('goodbye')
>>         @cmdloop.shorthelp('say goodbye')
>>         @cmdloop.usage('goodbye TARGET')
>>
>> to just:
>>
>>         @cmdloop.addspec(aliases=['goodbye'], shorthelp ='say goodbye',
>> usage='goodbye TARGET')
>>
>> leaving the possibility of multiple decorators when one line gets to long:
>>
>>         @cmdloop.addspec(aliases=['goodbye'], shorthelp ='say goodbye')
>>         @cmdloop.addspec(usage='goodbye TARGET  # where TARGET is a filename 
>> in
>> the current directory')

> Well, why not support both, and leave it up to the user?

Having only one method keeps the API simple.  Also, the addspec() approach 
allows the user to choose between single and multiple lines.

BTW, addspec() could be made completely general by supporting all possible 
keywords at once:

def addspec(**kwds):
    def decorator(func):
        func.__dict__.update(kwds)
        return func
    return decorator

With an open definition like that, users can specify new attributes with less 
effort.

Raymond 

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[Python-Dev] New Module: CommandLoop