Boost Python - C++ class' private static data blown away before accessing in Python?
stodge at gmail.com
Fri Jul 4 18:18:33 CEST 2008
I've exposed a C++ class to Python using Boost Python. The class,
let's say it's called Entity, contains private static data, which is
an array of strings. Though I think it implements it using MFC's
I've also exposed a public function from Entity - let's say it's
called foo. This function accesses the private static data (the string
I have multiple instances of Entity stored in a custom C++ container,
which is also exposed to Python as class EntityList.
In Python, I retrive an Entity from the EntityList:
elist = EntityList()
entity = elist.get_at(0)
But it crashes inside foo() as the private static data is empty; or
rather the string array is empty. I know before that point that the
private static data is valid when accessed earlier by the C++ code as
the program works fine. It just won't work from Python, so somehow the
private static data has been blown away but I can't work out where or
The static data is setup at initialisation - my Python code is only
called long after initialisation is complete.
I added a static dump() function to the Entity class that dumps the
string array, and even if I just do the following in Python:
in Python, the private static data is empty. Doing the same from C++
works fine. Weird.
I know this is an impossible question to ask, but can anyone think of
something obvious I need to look into?
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