WindowsError：加载ctypes DLL时出错[126] [英] WindowsError: [Error 126] when loading a DLL with ctypes

问题描述

在Windows 7上使用Python 2.7可以正常工作：

This works fine on Windows 7 with Python 2.7:

lib = ctypes.cdll.LoadLibrary('prov_means')
provmeans = lib.provmeans  

库prov_means.DLL在我的工作目录中。它导出一个简单的，独立的C函数provmeans（），没有依赖关系。

The library prov_means.DLL is in my working directory. It exports a simple, stand-alone C function provmeans() with no dependencies.

当我在Windows XP和Python 2.7上尝试相同的事情时，我得到

When I try the same thing on Windows XP and Python 2.7 I get

Traceback (most recent call last):
  File "D:\python\Auxil\src\auxil.py", line 130, in <module>
    lib = ctypes.cdll.LoadLibrary('prov_means')
  File "C:\Python27\lib\ctypes\__init__.py", line 431, in LoadLibrary
    return self._dlltype(name)
  File "C:\Python27\lib\ctypes\__init__.py", line 353, in __init__
    self._handle = _dlopen(self._name, mode)
WindowsError: [Error 126] The specified module could not be found 

我尝试过将DLL复制到Windows \System32并输入完整路径名称

I have tried copying the DLL to Windows\System32 and also entering the full path name

"d:\\python\\auxil\\src\\prov_means"

带有和不含.DLL延期。没有什么工作。

with and without the ".DLL" extension. Nothing works.

推荐答案

错误126是在找不到依赖DLL时所得到的。这有两个明显的原因：

Error 126 is what you get when a dependent DLL can not be found. There are two obvious causes for this:

1. 您的DLL未找到。


2. 您的DLL取决于找不到的其他DLL。

我怀疑选项1是问题，但在任何情况下，我想我可能会使用一个完整的路径，该DLL可以肯定。

I doubt that option 1 is the problem but in any case I think I would probably be using a full path to that DLL to be sure.

所以，留下选项2和最常见的原因那就是你的目标机器没有安装C ++运行时。在目标机器上安装C ++运行时，或使用静态链接， / MT ，构建DLL时，不需要重新分发运行时。

So that leaves option 2 and the most common cause for that is that your target machine does not have the C++ runtime installed. Either install the C++ runtime on your target machine, or use static linking, /MT, when building your DLL so that you do not need to redistribute the runtime.

可能是在您开发了DLL的机器，您已经安装了一个C ++编译器，并为您安装了运行时。在目标机器上，代码失败，您尚未安装编译器，因此运行时不存在。

Probably, on the machine that you developed the DLL, you have installed a C++ compiler and that installed the runtime for you. On your target machine, where the code fails, you have not installed the compiler and so the runtime is not present.

这篇关于WindowsError：加载ctypes DLL时出错[126]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！