（解决）导入PYBID11/C++编译模块不工作

Question

我对python setuptools和dist还不太熟悉，我似乎无法导入一个c++包装器模块来使用这些函数。在

编译的.so文件显示在已安装的-文件.txt在pip安装之后，但是导入包装器却没有。在

设置.py

import subprocess
import os
from pathlib import Path

from setuptools import setup, Extension, find_packages
from setuptools.command.build_ext import build_ext


class CMakeExtension(Extension):
    def __init__(self, name):
        Extension.__init__(self, name, sources=[])


class CMakeBuild(build_ext):
    def run(self):
        for ext in self.extensions:
            self.build_cmake(ext)
        super().run()

    def build_cmake(self, ext):
        try:
            subprocess.check_output(["cmake", "--version"])
        except OSError:
            raise RuntimeError(
                "CMake must be installed to build the following extensions: "
                + ", ".join(e.name for e in self.extensions)
            )

        cwd = Path().absolute()

        # these dirs will be created in build_py, so if you don't have
        # any python sources to bundle, the dirs will be missing
        build_temp = Path(self.build_temp)
        build_temp.mkdir(parents=True, exist_ok=True)
        extdir = Path(self.get_ext_fullpath(ext.name))
        extdir.mkdir(parents=True, exist_ok=True)

        pyenv_root = os.environ.get("PYENV_ROOT")

        cmake_args = [
            f"-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={extdir}",
            "-DCMAKE_BUILD_TYPE=Release",
            "-DTRANSIT_INCLUDE_TESTS:BOOL=OFF",
        ]

        if pyenv_root is not None:
            cmake_args += [f"-DPYTHON_EXECUTABLE={pyenv_root}/shims/python"]

        build_args = ["--config", "Release", "--", "-j2"]

        env = os.environ.copy()

        self.announce("Running CMake prepare", level=3)
        subprocess.check_call(["cmake", cwd] + cmake_args, cwd=build_temp, env=env)

        self.announce("Building extensions")
        cmake_cmd = ["cmake", "--build", "."] + build_args
        subprocess.check_call(cmake_cmd, cwd=build_temp)


setup(
    name="bgtfs_py_lib",
    version="3.2.2",
    long_description="",
    zip_safe=False,
    install_requires=[
        "redis==2.10.6",
        "cffi==1.11.5",
        "numpy==1.15.3",
        "patricia-trie==10",
        "PuLP==1.6.8",
        "py-lz4framed==0.13.0",
        "pycparser==2.19",
        "pyparsing==2.2.2",
        "pypng==0.0.18",
        "pyproj==1.9.5.1",
        "python-graph-core==1.8.2",
        "pytz==2018.6",
        "redis==2.10.6",
        "requests==2.21.0",
        "six==1.11.0",
        "tabulate==0.8.2",
        "unicodecsv==0.14.1",
        "Unidecode==1.0.22",
    ],
    ext_modules=[CMakeExtension("bgtfs_py_lib.bgtfs_py_lib_wrapper")],
    cmdclass=dict(build_ext=CMakeBuild),
    packages=find_packages(exclude=["tests"]),
    package_data={"": "*.so"},
)

CMakeLists.txt文件

^{pr2}$

我尝试使用virtualenv来隔离在我的项目中运行所需的模块。在

以下是文件结构：

.
|-- CMakeLists.txt
|-- README.md
|-- bgtfs_py_lib
|   |-- __init__.py
|   |-- bgtfs_handler
|-- cpp
|   |-- BgtfsFeedHandler.cpp
|   |-- BgtfsFeedHandler.h
|   |-- bgtfsPyLibWrapper.cpp
|   `-- pybindCasts.cpp
|-- deploy.sh
|-- make.sh
|-- pybind11
|-- setup.py
|-- submodules
|-- test.sh
`-- tests
    |-- __init__.py
    |-- __pycache__
    |-- fixtures
    |-- test.py
    `-- test_functions.py

bgtfs_py_lib中的init.py文件如下所示。包装器的功能正在公开。在

import bgtfs_py_lib_wrapper as _bgtfs_py_lib
from bgtfs_py_lib.bgtfs_handler.bgtfs_handler import BgtfsHandler

在另一个项目中，使用git+ssh和egg进行pip安装。在

git+ssh://git@github.com/path/to/project.git@build/production/setup#egg=bgtfs_py_lib

当我ctrl+space在pyCharm中找到包装器模块并显示类。
该模块位于二进制Skeletons目录中，但是

将bgtfs_py_lib_wrapper导入为_bgtfs_py_lib只是不起作用，并引发以下异常：ModuleNotFoundError: No module named 'bgtfs_py_lib_wrapper'

可以帮助我找出如何正确地构建C++和PybDun11模块，并在PiP安装包中使用ValualEnv吗？在

Answer 1

我终于解决了

结果是CMakeLists.txt文件需要更改，因为cmake_参数和内部版本参数之间存在不一致。所以CMakeList.txt文件文件现在如下所示：

CMakeLists.txt文件

cmake_minimum_required(VERSION 3.8)

project(bgtfs_py_lib_wrapper)
include(submodules/transitLib/bgtfs/bgtfsLib/TransitUtils/transit_shared.cmake)

# bgtfsPyLib
set(PYBIND11_CPP_STANDARD -std=c++14)
set(PYBIND11_PYTHON_VERSION 3.6)

add_subdirectory(submodules/transitLib transitLib)
add_subdirectory(pybind11)

include_directories(
    cpp
    submodules/transitLib/bgtfs/bgtfsLib/
    submodules/transitLib/bgtfs/bgtfsLib/bgtfsLib
)

pybind11_add_module(bgtfs_py_lib_wrapper MODULE NO_EXTRAS
    cpp/pybindCasts.cpp
    cpp/bgtfsPyLibWrapper.cpp
    cpp/BgtfsFeedHandler.cpp
)

target_link_libraries(bgtfs_py_lib_wrapper PRIVATE transitLib)
target_compile_definitions(bgtfs_py_lib_wrapper PRIVATE TRANSIT_SERVER)
target_compile_definitions(transitLib PRIVATE TRANSIT_SERVER)
target_compile_definitions(bgtfsLib PRIVATE ENABLE_BACKWARD_FILE_COMPATIBILITY YES)
set_default_target_properties(bgtfs_py_lib_wrapper)

以及设置.py文件现在是：

设置.py

^{pr2}$

扩展文件不会被输出到bgtfs_py_lib目录，而是被输出到虚拟环境中，项目本身是必需的

向Sergei大声呼喊，请他帮忙解决问题