Python代码执行报错：matplotlib导入时kiwisolver DLL加载失败

报错核心 #

导入matplotlib时，加载kiwisolver的_cext模块出现DLL加载失败，找不到指定模块。

完整报错栈：

Traceback (most recent call last):
  File "C:\Users\pacym\Plc_Math\pythonProject3\PLC_PUMP_GALLONS.py", line 7, in <module>
    from matplotlib.figure import Figure

  File "C:\Users\pacym\Plc_Math\pythonProject3\.venv\Lib\site-packages\matplotlib\__init__.py", line 272, in <module>
    _check_versions()

  File "C:\Users\pacym\Plc_Math\pythonProject3\.venv\Lib\site-packages\matplotlib\__init__.py", line 266, in _check_versions
    module = importlib.import_module(modname)

             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\pacym\AppData\Local\Programs\Python\Python311\Lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\pacym\Plc_Math\pythonProject3\.venv\Lib\site-packages\kiwisolver\__init__.py", line 8, in <module>
    from ._cext import (

ImportError: DLL load failed while importing _cext: The specified module could not be found.

解决方案 #

• 重新安装kiwisolver：激活虚拟环境后执行以下命令

  pip uninstall kiwisolver -y
  pip install kiwisolver
  

  若仍报错，尝试指定兼容Python3.11的稳定版本：

  pip install kiwisolver==1.4.4
  

• 重建matplotlib依赖链：同时卸载相关包后重新安装matplotlib，让其自动匹配兼容依赖

  pip uninstall matplotlib kiwisolver -y
  pip install matplotlib
  

• 安装VC运行库：Windows环境下，Python的C扩展模块依赖微软VC Redistributable运行库，安装对应Python3.11的VC++ 2015-2022版本后重试
• 验证架构匹配：确保Python和安装的依赖包架构一致（均为32位或64位），执行以下命令查看Python架构

  python -c "import sys; print('64位' if sys.maxsize > 2**32 else '32位')"
  

  若架构不匹配，卸载现有kiwisolver后重新安装对应架构的包

内容的提问来源于stack exchange，提问作者ready press start