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| Started by | roy@panix.com (Roy Smith) |
|---|---|
| First post | 2013-01-08 16:22 -0500 |
| Last post | 2013-01-08 22:54 +0000 |
| Articles | 6 — 5 participants |
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How to tell how many weeks apart two datetimes are? roy@panix.com (Roy Smith) - 2013-01-08 16:22 -0500
Re: How to tell how many weeks apart two datetimes are? marduk <marduk@python.net> - 2013-01-08 16:31 -0500
Re: How to tell how many weeks apart two datetimes are? Ian Kelly <ian.g.kelly@gmail.com> - 2013-01-08 14:33 -0700
Re: How to tell how many weeks apart two datetimes are? Ian Kelly <ian.g.kelly@gmail.com> - 2013-01-08 14:36 -0700
Re: How to tell how many weeks apart two datetimes are? MRAB <python@mrabarnett.plus.com> - 2013-01-08 22:50 +0000
Re: How to tell how many weeks apart two datetimes are? Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-08 22:54 +0000
| From | roy@panix.com (Roy Smith) |
|---|---|
| Date | 2013-01-08 16:22 -0500 |
| Subject | How to tell how many weeks apart two datetimes are? |
| Message-ID | <kci2m1$fp4$1@panix2.panix.com> |
How do you tell how many weeks apart two datetimes (t1 and t2) are? The "obvious" solution would be: weeks = (t2 - t1) / timedelta(days=7) but that doesn't appear to be allowed. Is there some fundamental reason why timedelta division not supported?
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| From | marduk <marduk@python.net> |
|---|---|
| Date | 2013-01-08 16:31 -0500 |
| Message-ID | <mailman.291.1357680711.2939.python-list@python.org> |
| In reply to | #36451 |
On Tue, Jan 8, 2013, at 04:22 PM, Roy Smith wrote: > How do you tell how many weeks apart two datetimes (t1 and t2) are? > The "obvious" solution would be: > > weeks = (t2 - t1) / timedelta(days=7) > > but that doesn't appear to be allowed. Is there some fundamental > reason why timedelta division not supported? > -- > http://mail.python.org/mailman/listinfo/python-list It works for python 3(.2): >>> x = datetime.timedelta(days=666) >>> week = datetime.timedelta(days=7) >>> x / week 95.14285714285714 >>> halfday = datetime.timedelta(hours=12) >>> x / halfday 1332.0
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| From | Ian Kelly <ian.g.kelly@gmail.com> |
|---|---|
| Date | 2013-01-08 14:33 -0700 |
| Message-ID | <mailman.292.1357680863.2939.python-list@python.org> |
| In reply to | #36451 |
On Tue, Jan 8, 2013 at 2:22 PM, Roy Smith <roy@panix.com> wrote: > How do you tell how many weeks apart two datetimes (t1 and t2) are? > The "obvious" solution would be: > > weeks = (t2 - t1) / timedelta(days=7) > > but that doesn't appear to be allowed. Is there some fundamental > reason why timedelta division not supported? Seems to be supported in Python 3.3, but not in 2.7.
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| From | Ian Kelly <ian.g.kelly@gmail.com> |
|---|---|
| Date | 2013-01-08 14:36 -0700 |
| Message-ID | <mailman.293.1357681002.2939.python-list@python.org> |
| In reply to | #36451 |
On Tue, Jan 8, 2013 at 2:33 PM, Ian Kelly <ian.g.kelly@gmail.com> wrote: > On Tue, Jan 8, 2013 at 2:22 PM, Roy Smith <roy@panix.com> wrote: >> How do you tell how many weeks apart two datetimes (t1 and t2) are? >> The "obvious" solution would be: >> >> weeks = (t2 - t1) / timedelta(days=7) >> >> but that doesn't appear to be allowed. Is there some fundamental >> reason why timedelta division not supported? > > Seems to be supported in Python 3.3, but not in 2.7. >From the docs: Changed in version 3.2: Floor division and true division of a timedelta object by another timedelta object are now supported, as are remainder operations and the divmod() function. True division and multiplication of a timedelta object by a float object are now supported.
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| From | MRAB <python@mrabarnett.plus.com> |
|---|---|
| Date | 2013-01-08 22:50 +0000 |
| Message-ID | <mailman.294.1357685430.2939.python-list@python.org> |
| In reply to | #36451 |
On 2013-01-08 21:22, Roy Smith wrote: > How do you tell how many weeks apart two datetimes (t1 and t2) are? > The "obvious" solution would be: > > weeks = (t2 - t1) / timedelta(days=7) > > but that doesn't appear to be allowed. Is there some fundamental > reason why timedelta division not supported? > Try this: weeks = (t2 - t1).days / 7
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| From | Oscar Benjamin <oscar.j.benjamin@gmail.com> |
|---|---|
| Date | 2013-01-08 22:54 +0000 |
| Message-ID | <mailman.295.1357685662.2939.python-list@python.org> |
| In reply to | #36451 |
On 8 January 2013 22:50, MRAB <python@mrabarnett.plus.com> wrote: > On 2013-01-08 21:22, Roy Smith wrote: >> >> How do you tell how many weeks apart two datetimes (t1 and t2) are? >> The "obvious" solution would be: >> >> weeks = (t2 - t1) / timedelta(days=7) >> >> but that doesn't appear to be allowed. Is there some fundamental >> reason why timedelta division not supported? >> > Try this: > > weeks = (t2 - t1).days / 7 You beat me to it... $ python Python 2.7.3 (default, Sep 26 2012, 21:51:14) [GCC 4.7.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import datetime >>> dt1 = datetime.datetime.now() >>> dt2 = dt1 - datetime.timedelta(days=8) >>> (dt2 - dt1) / 7 > datetime.timedelta(days=14) False Oscar
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