Issue618146
This issue tracker has been migrated to GitHub,
and is currently read-only.
For more information,
see the GitHub FAQs in the Python's Developer Guide.
Created on 2002-10-03 16:57 by kibab, last changed 2022-04-10 16:05 by admin. This issue is now closed.
Messages (5) | |||
---|---|---|---|
msg12575 - (view) | Author: Kaleb Pederson (kibab) | Date: 2002-10-03 16:57 | |
The calendar module doesn't explicitly say that it doesn't work for dates pre-1970. The best case is that this is a DOCUMENTATION BUG. I would prefer to see a more powerful date module that starts at the beginning of the Gregorian calendar. What it does say: From http://www.python.org/doc/current/lib/module- calendar.html: (when 2.2.1 is current) weekday(year, month, day) - Returns the day of the week (0 is Monday) for year (1970-...), month (1-12), day (1-31). // I figured that was fine, I can avoid using that function in my wrapper timegm(tuple) - An unrelated but handy function that takes a time tuple such as returned by the gmtime() function in the time module, and returns the corresponding Unix timestamp value, assuming an epoch of 1970, and the POSIX encoding. In fact, time.gmtime() and timegm() are each others' inverse. // Okay, I can avoid that too, especially since it is "unrelated" I probably should have got a clue based on the above, but I didn't.... Here is the traceback: (under python 2.2.1-Windows) >>> import calendar >>> calendar.monthcalendar(1969,12) Traceback (most recent call last): File "<stdin>", line 1, in ? File "c:\progra~1\python22\lib\calendar.py", line 122, in monthcalendar day1, ndays = monthrange(year, month) File "c:\progra~1\python22\lib\calendar.py", line 115, in monthrange day1 = weekday(year, month, 1) File "c:\progra~1\python22\lib\calendar.py", line 106, in weekday secs = mktime((year, month, day, 0, 0, 0, 0, 0, 0)) OverflowError: mktime argument out of range The error is identical under Linux There was one related "bug report" previously but nothing else identical: [ 434143 ] calendar module broken for 1900 |
|||
msg12576 - (view) | Author: Neal Norwitz (nnorwitz) * | Date: 2002-11-02 02:53 | |
Logged In: YES user_id=33168 Is this still a problem in 2.2.2? |
|||
msg12577 - (view) | Author: Neal Norwitz (nnorwitz) * | Date: 2002-11-02 21:05 | |
Logged In: YES user_id=33168 I can't replicate on Linux w/2.2.2 or 2.3, changing category to Windows. |
|||
msg12578 - (view) | Author: Kaleb Pederson (kibab) | Date: 2002-11-02 22:04 | |
Logged In: YES user_id=157918 I checked it out under Linux on 2.2.2 and this is what I found. >>> calendar.monthcalendar(1902,01) [[0, 0, 1, 2, 3, 4, 5], [6, 7, 8, 9, 10, 11, 12], [13, 14, 15, 16, 17, 18, 19], [20, 21, 22, 23, 24, 25, 26], [27, 28, 29, 30, 31, 0, 0]] >>> calendar.monthcalendar(1901,12) Traceback (most recent call last): File "<stdin>", line 1, in ? File "calendar.py", line 122, in monthcalendar day1, ndays = monthrange(year, month) File "calendar.py", line 115, in monthrange day1 = weekday(year, month, 1) File "calendar.py", line 106, in weekday secs = mktime((year, month, day, 0, 0, 0, 0, 0, 0)) OverflowError: mktime argument out of range >>> calendar.monthcalendar(2038,1) [[0, 0, 0, 0, 1, 2, 3], [4, 5, 6, 7, 8, 9, 10], [11, 12, 13, 14, 15, 16, 17], [18, 19, 20, 21, 22, 23, 24], [25, 26, 27, 28, 29, 30, 31]] >>> calendar.monthcalendar(2038,2) Traceback (most recent call last): File "<stdin>", line 1, in ? File "calendar.py", line 122, in monthcalendar day1, ndays = monthrange(year, month) File "calendar.py", line 115, in monthrange day1 = weekday(year, month, 1) File "calendar.py", line 106, in weekday secs = mktime((year, month, day, 0, 0, 0, 0, 0, 0)) OverflowError: mktime argument out of range I consider this much better than before. I would only recommend that the upper and lower bounds for valid limits be added to the documentation as it isn't stated anywhere in the docs. Thanks. |
|||
msg12579 - (view) | Author: Neal Norwitz (nnorwitz) * | Date: 2002-11-03 00:16 | |
Logged In: YES user_id=33168 Checked in as: Doc/lib/libcalendar.tex 1.16 and 1.14.6.2 |
History | |||
---|---|---|---|
Date | User | Action | Args |
2022-04-10 16:05:43 | admin | set | github: 37258 |
2002-10-03 16:57:47 | kibab | create |