[Python-Dev] RE: [Python-checkins] python/dist/src/Lib _strptime.py, 1.35, 1.36

[Erik Andersén]

Tony Meyer wrote:

>>Index: _strptime.py
>>    
>>
>[...]
>  
>
>>+        # For some reason when Dec 31 falls on a Monday the 
>>week of the year is
>>+        # off by a week; verified on both OS X and Solaris.
>>+        elif weekday == 0 and week_of_year_start == 6 and 
>>week_of_year >= 52:
>>+            week_of_year += 1
>>    
>>
>
>Is this right?  At the moment, if I ask for Monday in the 52nd week of 2008,
>I get the 5th of January 2009:
>
>  
>
>>>>time.strptime("2008 52 1", "%Y %U %w")
>>>>        
>>>>
>(2009, 1, 5, 0, 0, 0, 0, 371, -1)
>
>For reference, Monday in the previous week is the 22nd of December:
>
>  
>
>>>>time.strptime("2008 51 1", "%Y %U %w")
>>>>        
>>>>
>(2008, 12, 22, 0, 0, 0, 0, 357, -1)
>
>Wouldn't December 29 2008 be the right answer? This is the result without
>that if:
>
>  
>
Yes, according to the Python documentation. You should however be aware 
that this is different from the standard  (ISO 8601:2000).
According to that standard, Monday, week 52, 2008 is December 22. 
Implementing a function that gives result different from what people
actually use is not very good. It is better to leave it unimplemented.
= Erik Andersen

>>>>time.strptime("2008 52 1", "%Y %U %w")
>>>>        
>>>>
>(2008, 12, 29, 0, 0, 0, 0, 364, -1)
>
>This is with WinXP SP1.
>
>=Tony Meyer
>
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