Can't do a multiline assignment!
Steve Holden
steve at holdenweb.com
Thu Apr 17 13:53:37 EDT 2008
Gary Herron wrote:
> s0suk3 at gmail.com wrote:
>> On Apr 17, 10:54 am, colas.fran... at gmail.com wrote:
>>
>>> On 17 avr, 17:40, s0s... at gmail.com wrote:
>>>
>>> Out of sheer curiosity, why do you need thirty (hand-specified and
>>> dutifully commented) names to the same constant object if you know
>>> there will always be only one object?
>>>
>> I'm building a web server. The many variables are names of header
>> fields. One part of the code looks like this (or at least I'd like it
>> to):
>>
>> class RequestHeadersManager:
>>
>> # General header fields
>> Cache_Control = \
>> Connection = \
>> Date = \
>> Pragma = \
>> Trailer = \
>> Transfer_Encoding = \
>> Upgrade = \
>> Via = \
>> Warning = \
>>
>> # Request header fields
>> Accept = \
>> Accept_Charset = \
>> Accept_Encoding = \
>> Accept_Language = \
>> Authorization = \
>> ...
>>
>
> But. *What's the point* of doing it this way. I see 14 variables
> being assigned a value, but I don't see the value, they are getting.
> Reading this bit if code provides no useful information unless I'm
> willing to scan down the file until I find the end of this mess. And in
> that scanning I have to make sure I don't miss the one single line that
> does not end in a backslash. (Your ellipsis conveniently left out the
> *one* important line needed to understand what this code is doing, but
> even if you had included it, I'd have to scan *all* lines to understand
> what a single value is being assigned.
>
> There is *no way* you can argue that code is clearer than this:
>
> # General header fields
> Cache_Control = None
> Connection = None
> Date = None
> Pragma = None
> ...
>
Thank you, you saved me from making that point. It doesn't even seem
like there's a need for each header to reference the same value (though
in this case they will, precisely because there is only one None object).
regards
Steve
--
Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/
More information about the Python-list
mailing list