[英]Large table access from c++ functions with boost::python
I'm generating a very large lookup table in C++ and using it from a variety of C++ functions. 我正在C ++中生成一个非常大的查找表,并通过各种C ++函数使用它。 These functions are exposed to python using boost::python.
这些功能使用boost :: python公开给python。
When not used as part of a class the desired behaviour is achieved. 当不用作类的一部分时,可以实现所需的行为。 When I try and use the functions as part of a class written in just python I run in to issues accessing the lookup table.
当我尝试将这些功能用作仅用python编写的类的一部分时,我遇到访问访问表的问题。
------------------------------------
C++ for some numerical heavy lifting
------------------------------------
include <boost/python>
short really_big_array[133784630]
void fill_the_array(){
//Do some things which populate the array
}
int use_the_array(std::string thing){
//Lookup a few million things in the array depending on thing
//Return some int dependent on the values found
}
BOOST_PYTHON_MODULE(bigarray){
def("use_the_array", use_the_array)
def("fill_the_array", fill_the_array)
}
---------
PYTHON Working as desired
---------
import bigarray
if __name__ == "__main__"
bigarray.fill_the_array()
bigarray.use_the_array("Some Way")
bigarray.use_the_array("Some Other way")
#All works fine
---------
PYTHON Not working as desired
---------
import bigarray
class BigArrayThingDoer():
"""Class to do stuff which uses the big array,
use_the_array() in a few different ways
"""
def __init__(self,other_stuff):
bigarray.fill_the_array()
self.other_stuff = other_stuff
def use_one_way(thing):
return bigarray.use_the_array(thing)
if __name__ == "__main__"
big_array_thing_doer = BigArrayThingDoer()
big_array_thing_doer.use_one_way(thing)
#Segfaults or random data
I think I am probably not exposing enough to python to make sure the array is accessible at the right times, but im not quite sure exactly what I shoudld be exposing. 我想我可能没有足够地使用python来确保在正确的时间可以访问该数组,但是我不确定我应该公开什么。 Equally likely that there is some sort of problem involving ownership of the lookup table.
同样可能存在某种涉及查找表所有权的问题。
I dont ever need to manipulate the lookup table except via the other c++ functions. 除了通过其他c ++函数之外,我不需要操纵查找表。
Missing a self in a definition. 在定义中缺少自我。 Used key word arguments where I should probably have used keyword only arguments so got no error when running.
使用了关键字参数,我应该只使用关键字参数,因此在运行时不会出错。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.