[IronPython] Problems with System.DateTime in RC1, and UtcNow in all 2.0 builds

[Curt Hagenlocher]

"UtcNow" returns a DateTime, so when you import it into your namespace,
you're importing a DateTime instead of some kind of property reference.
 This is by design.  The proper usage is
from System import DateTime
DateTime.UtcNow

This is also consistent with usage under C#.

I think the ability to import "get_UtcNow" was a bug that has been fixed for
the RC.

On Fri, Oct 24, 2008 at 12:13 PM, Phil Vacca <phil.vacca at gmail.com> wrote:

> Hi,
>
> I've been using each of the Betas of IPy 2, but now that I've switched
> to RC1, I've got a probem.  The function get_UtcNow() doesn't seem to
> exist in the RC.  Also the UtcNow method seems to have a major problem
> as well.  I am hoping this is related to my own usage, and not to the
> IPy build!
>
> At the interpreter "from System.DateTime import get_UtcNow" fails
> under the current RC (ipy.exe fileversion 2.0.11020.0), but works fine
> from beta 5 (ipy.exe fileversion 2.0.10310.5).
>
> The error I get reads:
>  File "<stdin>", line 1, in <module>
> ImportError: Cannot import name get_UtcNow
>
> running "dir( System.DateTime )" shows confirming results.  The "get_"
> functions just don't appear to be in there...
>
> So, I tried just using the System.DateTime UtcNow method.
> Unfortunately, it seems to only work once.  By this I mean that it
> returns the correct time for UtcNow at import, but then every
> subsequent call returns the SAME initialized time.  This behavior is
> consistent at least against Beta 4 & 5, as well as the RC.
>
> I ran the following code at the beta 5 interpreter and got these results:
> import System
> from System.DateTime import UtcNow, get_UtcNow
>
> def problem():
>    print UtcNow, get_UtcNow()
>    print long(sum([i for i in range(10000000)])) ## waste some cycles
>    print UtcNow, get_UtcNow()
>
> def noProblem():
>    print System.DateTime.UtcNow, get_UtcNow()
>    print long(sum([i for i in range(10000000)])) ## waste some cycles
>    print System.DateTime.UtcNow, get_UtcNow()
>
> >>> problem()
> 10/24/2008 7:11:21 PM 10/24/2008 7:11:28 PM
> 49999995000000
> 10/24/2008 7:11:21 PM 10/24/2008 7:11:32 PM
> >>> noProblem()
> 10/24/2008 7:11:43 PM 10/24/2008 7:11:43 PM
> 49999995000000
> 10/24/2008 7:11:47 PM 10/24/2008 7:11:47 PM
>
> Does anyone else observe this same behavior?
>
> -Phil
>
> phil.vacca at gmail.com
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