如何解决 weasyprint 错误消息 gobject-2.0-0 错误 0x7e 消息？

Question

我安装了几个基于 `https://pbpython.com/pdf-reports.htm 的文件来创建报告。但是以下错误消息

Traceback (most recent call last):
  File "C:\histdata\test02.py", line 10, in <module>
    from weasyprint import HTML
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\weasyprint\__init__.py", line 322, in <module>
    from .css import preprocess_stylesheet  # noqa isort:skip
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\weasyprint\css\__init__.py", line 27, in <module>
    from . import computed_values, counters, media_queries
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\weasyprint\css\computed_values.py", line 16, in <module>
    from ..text.ffi import ffi, pango, units_to_double
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\weasyprint\text\ffi.py", line 380, in <module>
    gobject = _dlopen(
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\weasyprint\text\ffi.py", line 377, in _dlopen
    return ffi.dlopen(names[0])  # pragma: no cover
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\cffi\api.py", line 150, in dlopen
    lib, function_cache = _make_ffi_library(self, name, flags)
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\cffi\api.py", line 832, in _make_ffi_library
    backendlib = _load_backend_lib(backend, libname, flags)
  File "C:\Users\AquaTrader\AppData\Local\Programs\Python\Python38\lib\site-packages\cffi\api.py", line 827, in _load_backend_lib
    raise OSError(msg)
OSError: cannot load library 'gobject-2.0-0': error 0x7e.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'gobject-2.0-0'

有什么建议吗？提前致谢。 （请注意github上有一个类似的问题告诉个人安装GTK3。）这是正确的吗？

Answer 1

该错误意味着无法找到作为 GTK3+ 一部分的 gobject-2.0.0 库。您是否遵循安装说明 (https://doc.courtbouillon.org/weasyprint/stable/first_steps.html)，其中包括安装 GTK3+？如果没有，就这样做。如果是，那么问题是 GTK3+ DLL 不是 Python 正在寻找它们的地方。为此，您需要将包含 DLL 的目录（例如 Windows 上的 C:\Program Files\GTK3-Runtime Win64\bin）添加到您的 PATH 环境变量中。该目录包含相关的libgobject-2.0-0.dll 库。

对于 Python 3.8+ 和 weasyprint 54+，您可以使用环境变量 WEASYPRINT_DLL_DIRECTORIES (documentation) 手动设置 GTK3+ 库的路径。