[jira] [Closed] (ARROW-2091) Interacting with arrow/pyarrow in C++

["Jun (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jun closed ARROW-2091.
----------------------
    Resolution: Fixed

Looks like I have all I need. It's just not documented!

> Interacting with arrow/pyarrow in C++
> -------------------------------------
>
>                 Key: ARROW-2091
>                 URL: https://issues.apache.org/jira/browse/ARROW-2091
>             Project: Apache Arrow
>          Issue Type: Improvement
>            Reporter: Jun
>            Priority: Minor
>
> I've been searching online for a while but cannot figure out how to do this. Please help if this is already a resolved issue.
> I have a c++/python application that interacts with arrow/pyarrow. I want to write a C++ api that takes python objects directly and operate on them in c++.
> {code:java}
> PyObject* process_table(PyObject* table)
> {
>     // process the arrow table
>     std::shared_ptr<arrow::Table> tablePtr = table; // How?
> }{code}
> The problem here is: how do I extract the internal std::shared_ptr<Table> from the PyObject?
> Unfortunately we are not using cython in our stack, we operate on PyObject * directly in c++.
> I can easily do this on numpy arrays:
> {code:java}
> PyObject * process_array(PyObject* arr)
> {
>     PyArray_Check(arr);
>     // process the PyArrayObject directly
>     ...
> }{code}
> I wonder is there any way to achieve this level of c++ integration without using cython? Thanks!



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