Using python-poppler-qt5 on Windows I am working on a project that involves qpageview, which is a library that extends PyQt5, and depends on python-poppler-qt5, the Python bindings for poppler-qt5. Poppler is a C++ library which easy to use on Linux, but difficult to use on Windows. A quick web search will indicate that many people have made various distributions for poppler on Windows, but unfortunately, none of these solve my problem. I have tried various environments on Windows, including MSYS, Cygwin, Anaconda, and the default Windows Python distribution with the MS Build Tools, and I believe that the furthest I have got is to use Cygwin, so this post will focus on that approach. I am just looking for someone to help point me in the right direction to getting this to work, as I have experience with Python, but much less with C/C++. This works fine in WSL, but I would like to make it work Windows natively too. First, to ensure that my various previous attempts will not cause problems, I created an entirely new Windows 10 installation in VirtualBox. Inside of VirtualBox, I only installed Cygwin (and Git Bash, so I could clone my repository to get my code in the virtual machine). Over the course of my various attempts, I have installed many packages to ensure that all the dependencies are installed in my Cygwin distribution. When I open up the Cygwin terminal, I use git to clone the repository. My minimal reproducible example program to run to prove qpageview works. This works fine in Ubuntu Linux on WSL:

from PyQt5.QtWidgets import QApplication
import qpageview

app = QApplication([])

v = qpageview.View()
v.resize(900, 500)
v.show()
v.loadPdf("../pyqt.pdf")
app.exec()

我安装了Cygwin包裹:https://pastebin.com/bL13jqic。

关于我的热带气候环境的其他信息:

me@system ~/python-poppler-qt5
$ pip freeze #this is run within cygwin, but outside of any virtual environment
Babel @ file:///pub/devel/python/python-babel/python-babel-2.12.1-1.noarch/build/dist/Babel-2.12.1-py3-none-any.whl
cffi @ file:///pub/devel/python/python-cffi/python-cffi-1.15.1-1.x86_64/build/dist/cffi-1.15.1-cp39-cp39-cygwin_3_4_6_x86_64.whl
chardet @ file:///pub/devel/python/python-chardet/python-chardet-4.0.0-2.noarch/build/dist/chardet-4.0.0-py2.py3-none-any.whl
Cython @ file:///pub/devel/python/python-cython/python-cython-0.29.33-1.x86_64/build/dist/Cython-0.29.33-cp39-cp39-cygwin_3_4_6_x86_64.whl
dbus-python @ file:///pub/devel/python/python-dbus/python-dbus-1.2.18-1.x86_64/build/dist/dbus_python-1.2.18-cp39-cp39-cygwin_3_3_3_x86_64.whl
distlib @ file:///pub/devel/python/python-distlib/python-distlib-0.3.6-1.noarch/build/dist/distlib-0.3.6-py2.py3-none-any.whl
docutils @ file:///pub/devel/python/python-docutils/python-docutils-0.18.1-1.noarch/build/dist/docutils-0.18.1-py2.py3-none-any.whl
filelock @ file:///pub/devel/python/python-filelock/python-filelock-3.9.0-1.noarch/build/dist/filelock-3.9.0-py3-none-any.whl
idna @ file:///pub/devel/python/python-idna/python-idna-3.3-1.noarch/build/dist/idna-3.3-py3-none-any.whl
imagesize @ file:///pub/devel/python/python-imagesize/python-imagesize-1.3.0-1.noarch/build/dist/imagesize-1.3.0-py2.py3-none-any.whl
iniconfig @ file:///pub/devel/python/python-iniconfig/python-iniconfig-2.0.0-1.noarch/build/dist/iniconfig-2.0.0-py3-none-any.whl
Jinja2 @ file:///pub/devel/python/python-jinja2/python-jinja2-3.1.2-1.noarch/build/dist/Jinja2-3.1.2-py3-none-any.whl
MarkupSafe @ file:///pub/devel/python/python-markupsafe/python-markupsafe-2.1.2-1.x86_64/build/dist/MarkupSafe-2.1.2-cp39-cp39-cygwin_3_4_6_x86_64.whl
olefile @ file:///pub/devel/python/python-olefile/python-olefile-0.46-3.noarch/build/dist/olefile-0.46-py2.py3-none-any.whl
packaging @ file:///pub/devel/python/python-packaging/python-packaging-21.3-1.noarch/build/dist/packaging-21.3-py3-none-any.whl
Pillow @ file:///home/Hamis/python-imaging/python-imaging-8.4.0-1.x86_64/build/dist/Pillow-8.4.0-cp39-cp39-cygwin_3_3_3_x86_64.whl
platformdirs @ file:///pub/devel/python/python-platformdirs/python-platformdirs-3.1.1-1.noarch/build/dist/platformdirs-3.1.1-py3-none-any.whl
pluggy @ file:///pub/devel/python/python-pluggy/python-pluggy-1.0.0-1.noarch/build/dist/pluggy-1.0.0-py2.py3-none-any.whl
ply==3.11
pycairo @ file:///pub/devel/python/python-cairo/python-cairo-1.20.1-1.x86_64/build/dist/pycairo-1.20.1-cp39-cp39-cygwin_3_3_3_x86_64.whl
pycparser @ file:///pub/devel/python/python-pycparser/python-pycparser-2.21-1.noarch/build/dist/pycparser-2.21-py2.py3-none-any.whl
PyCygwin==0.1
Pygments @ file:///pub/devel/python/python-pygments/python-pygments-2.10.0-1.noarch/build/dist/Pygments-2.10.0-py3-none-any.whl
PyGObject @ file:///cygdrive/d/a/scallywag/python-gi/python-gi-3.36.1-3.x86_64/build/dist/PyGObject-3.36.1-cp39-cp39-cygwin_3_4_5_x86_64.whl
pyparsing @ file:///pub/devel/python/python-pyparsing/python-pyparsing-3.0.6-1.noarch/build/dist/pyparsing-3.0.6-py3-none-any.whl
PyQt-builder==1.15.1
PyQt5==5.15.6
pytest @ file:///pub/devel/python/python-pytest/python-pytest-7.3.0-1.noarch/build/dist/pytest-7.3.0-py3-none-any.whl
requests @ file:///pub/devel/python/python-requests/python-requests-2.27.1-1.noarch/build/dist/requests-2.27.1-py2.py3-none-any.whl
sip==6.7.9
six @ file:///pub/devel/python/python-six/python-six-1.16.0-1.noarch/build/dist/six-1.16.0-py2.py3-none-any.whl
snowballstemmer @ file:///pub/devel/python/python-snowballstemmer/python-snowballstemmer-2.2.0-1.noarch/build/dist/snowballstemmer-2.2.0-py2.py3-none-any.whl
Sphinx @ file:///pub/devel/python/python-sphinx/python-sphinx-4.4.0-1.noarch/build/dist/Sphinx-4.4.0-py3-none-any.whl
sphinxcontrib-serializinghtml @ file:///pub/devel/python/python-sphinxcontrib-serializinghtml/python-sphinxcontrib-serializinghtml-1.1.5-1.noarch/build/dist/sphinxcontrib_serializinghtml-1.1.5-py2.py3-none-any.whl
toml @ file:///pub/devel/python/python-toml/python-toml-0.10.2-2.noarch/build/dist/toml-0.10.2-py2.py3-none-any.whl
tomli==2.0.1
urllib3 @ file:///pub/devel/python/python-urllib3/python-urllib3-1.26.7-1.noarch/build/dist/urllib3-1.26.7-py2.py3-none-any.whl
virtualenv @ file:///pub/devel/python/python-virtualenv/python-virtualenv-20.21.0-1.noarch/build/dist/virtualenv-20.21.0-py3-none-any.whl

me@system ~/python-poppler-qt5
$ which gcc
/usr/bin/gcc

me@system ~/python-poppler-qt5
$ which g++
/usr/bin/g++

me@system ~/python-poppler-qt5
$ which python
/usr/bin/python

me@system ~/python-poppler-qt5
$ which sip-build
/usr/local/bin/sip-build

me@system ~/python-poppler-qt5
$ which sip-install
/usr/local/bin/sip-install

me@system ~/python-poppler-qt5
$ python --version
Python 3.9.16

me@system ~/python-poppler-qt5
$ gcc --version
gcc (GCC) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


me@ system ~/python-poppler-qt5
$ g++ --version
g++ (GCC) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


me@system ~/python-poppler-qt5
$ sip-build --version
6.7.9

me@system ~/python-poppler-qt5
$ sip-install --version
6.7.9

me@system ~/python-poppler-qt5
$ which ld
/usr/bin/ld

me@system ~/python-poppler-qt5
$ ld --version
GNU ld (GNU Binutils) 2.40
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.

为了建立这一系统,我仅操作sip-build -verbose。 当你安装了Python-poppler-qt5和Pip时,该指挥系统也投入运作,但是这允许你实际上看到编集器的分解结果。 然而,我对汇编阶段感到困惑,我正在收到大量错误信息,似乎表明与某种“灰色”和“C++”兼容图书馆有联系。 例如,其中第5条说:

/usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: sippopplerqt5cmodule.o:sippopplerqt5cmodule.cpp:(.text+0x296): undefined reference to `Py_BuildValue 
/usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: sippopplerqt5cmodule.o:sippopplerqt5cmodule.cpp:(.text+0x306): undefined reference to `Py_BuildValue 
/usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: sippopplerqt5cmodule.o:sippopplerqt5cmodule.cpp:(.text+0x1ad9): undefined reference to `PyModule_Create2 
/usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: sippopplerqt5cmodule.o:sippopplerqt5cmodule.cpp:(.text+0x1aed): undefined reference to `PyModule_GetDict 
/usr/lib/gcc/x86_64-pc-cygwin/11/../../../../x86_64-pc-cygwin/bin/ld: sippopplerqt5cmodule.o:sippopplerqt5cmodule.cpp:(.text+0x1afc): undefined reference to `PyImport_ImportModule 

我不知道如何纠正这种情况,我期待着看到有人能够帮助我正确指明方向。 你能够补充的是有用的。 感谢!

更新:建筑文字似乎排除了必要的加++编造旗——lpython3.9。 问题在于如何适当补充,因为项目似乎自动产生文件。