Hey all, following up on a question I asked on stack overflow <https://stackoverflow.com/questions/57863751/how-to-convert-pyarrow-table-to-arrow-table-when-interfacing-between-pyarrow-in>.
It seems there is some code <https://arrow.apache.org/docs/python/extending.html#_CPPv412unwrap_tableP8PyObjectPNSt10shared_ptrI5TableEE> in PyArrow’s C++ to convert from a PyArrow table to an Arrow table. The problem with this is that my C++ library <https://github.com/finos/perspective> is going to build and link against Arrow on the C++ side rather than PyArrow side (because it will also be consumed in WebAssembly), so I want to avoid also linking against PyArrow’s copy of the arrow library. I also need to look for PyArrow’s header files, which might conflict with the version in the local C++ code. My solution right now is to just assert that PyArrow version == Arrow version and do some pruning (so I link against local libarrow and PyArrow’s libarrow_python rather than use PyArrow’s libarrow), but ideally it would be great if there was a clean way to hand a PyArrow Table over to C++ without requiring the C++ to have PyArrow (e.g. using only a PyObject *). Please forgive my ignorance/google skills if its already possible! unwrap_table code: https://github.com/apache/arrow/blob/c39e3508f93ea41410c2ae17783054d05592dc0e/python/pyarrow/public-api.pxi#L310 <https://github.com/apache/arrow/blob/c39e3508f93ea41410c2ae17783054d05592dc0e/python/pyarrow/public-api.pxi#L310> library pruning: https://github.com/finos/perspective/blob/python_arrow/cmake/modules/FindPyArrow.cmake#L53 <https://github.com/finos/perspective/blob/python_arrow/cmake/modules/FindPyArrow.cmake#L53> Tim
