[PyQt] Supplying PyQt5 via PyPI

Marcus Ottosson konstruktion at gmail.com
Tue Sep 23 09:14:42 BST 2014

Thanks Chris and Matt.

On 22 September 2014 22:58, Chris Kaynor <ckaynor at zindagigames.com> wrote:

> On Mon, Sep 22, 2014 at 2:13 PM, Matt Newell <newellm at blur.com> wrote:
>> I have compiled qt/sip/pyqt and a lot of other c++ stuff with msvc2005,
>> 2008,
>> 2010, and recently 2012 ALL linked against python.org's python 2.7 and
>> I've
>> never had an issue.  This code has been used extensively in production
>> with
>> over 100 users inside various 3rd party applications (3dsmax, softimage
>> xsi,
>> more recently maya), a bunch of in house applications, and from python.exe
>> itself.
>> However you MUST use the same msvc for anything that passes around c++
>> objects, or you WILL get crashes.
>> Fortunately libpython is an all C api and it's my understanding that the
>> C ABI
>> has been stable between msvc versions.  I think the new/delete problem
>> does
>> not apply because of the way python's memory management works.  I also
>> think
>> that any python modules i've compiled do not pass FILE pointers to
>> python's
>> api.
>> I'm not saying problems aren't possible just that in my experience it
>> works
>> fine.
> This has generally been my experience as well. Namely, at work we use Maya
> 2013 which embeds CPython 2.7 compiled against VS2010, and most 3rd party C
> extensions work fine. Additionally, we have a few internal C extensions as
> well, which are compiled against VS2010, and they work fine in Python 2.7
> as downloaded from python.org.
> In a few cases, however, we have run into issues, which are quite
> annoying. Generally, any issues show up almost immediately, however in a
> few cases crashes have shown up days or weeks after starting to use a
> library, when somebody decides to call a function that then passes a C std
> object across the library boundary, which are then often very difficult to
> debug.
> Chris
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*Marcus Ottosson*
konstruktion at gmail.com
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