Can a Python environment host C/C++ packages?

Doug_Epling · January 13, 2022, 1:43am

I just installed tabula-py into this env I set up especially for this project I am working on. As you might know, tabula-py relies heavily on subprocesses written in Java. The tabula-py module seems to work fine in this regard, but I was not pleased with the results. So I successfully called, from the Python environment, my system’s reference install of xpdf/poppler without doing anything to the env. But I am wondering if it is possible to provide a custom make/install of xpdf/poppler (C/C++) into a Python environment. Any pointers to more information about this, if it is even a thing?

AlbertDeFusco · January 13, 2022, 3:05am

Hi, Doug. Welcome to the Community.

In a very general sense yes, Conda supports C/C++. However, the package must first be built into a conda package.

I see that poppler is alrealy available

https://anaconda.org/search?q=Poppler

In your conda env you can run

conda install -c poppler

I don’t see any evidence of xpdf on Anaconda.org, but if you’re interested it’s not exceedingly difficult to create Conda packages and submit them to conda-forge.org. Here’s how the poppler package is compiled on linux and mac. See the bld.bat file in the same directory for the Windows details.

github.com

conda-forge/poppler-feedstock/blob/master/recipe/build.sh

#! /bin/bash

set -e

export EXTRA_CMAKE_ARGS="-GNinja -DCMAKE_INSTALL_LIBDIR=lib -DENABLE_UNSTABLE_API_ABI_HEADERS=ON -DENABLE_LIBCURL=ON -DENABLE_LIBOPENJPEG=openjpeg2"

if [ -n "$OSX_ARCH" ] ; then
    # The -dead_strip_dylibs option breaks g-ir-scanner in this package: the
    # scanner uses the linker to find paths to dylibs, and it wants to find
    # libpoppler.dylib, but with this option the linker strips the library
    # from the test executable. The error message is "ERROR: can't resolve
    # libraries to shared libraries: poppler".
    export LDFLAGS="$(echo $LDFLAGS |sed -e "s/-Wl,-dead_strip_dylibs//g")"
    export LDFLAGS_LD="$(echo $LDFLAGS_LD |sed -e "s/-dead_strip_dylibs//g")"
fi

if [ "${CONDA_BUILD_CROSS_COMPILATION}" = "1" ]; then
    unset _CONDA_PYTHON_SYSCONFIGDATA_NAME
    (
        mkdir -p native-build

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Doug_Epling · January 13, 2022, 1:46pm

Many thanks, that is good to know.

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Can a Python environment host C/C++ packages?

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