在python 3.4中从imp转换为importlib时出现问题 [英] Problems when converting from imp to importlib in python 3.4

问题描述

我已经制作了一个可以加载插件的Python应用程序.这些插件是根据名称和路径加载的.

I've made a Python application which can load plugins. These plugins are loaded based on a name and path.

我当前正在使用

pluginModule = imp.load_source(pluginModuleName,  pluginModulePath)

然后以这种方式在模块中获取类实例

and then getting a class instance in the module this way

# Load the module class and initialize it.
if hasattr(pluginModule, pluginClassName):
  try:
    pluginClassInst = getattr(pluginModule, pluginClassName)()
  except Exception as e:
    errorMsg = ('In plugin module [{}], {}'.format(os.path.basename(pluginModulePath), e))
    exceptionTracePrint(self._log)
    self._log.error(errorMsg)
    continue

由于不建议使用imp lib，所以我想使用importlib.而且，获取类实例的唯一类似方法是使用

Since the imp lib is deprecated I want to use importlib. And the only similar method of getting my class instance was to use

pluginModule = importlib.machinery.SourceFileLoader(pluginModuleName, pluginModulePath).load_module()

这很奇怪(我正在使用pyCharm作为IDE).当我在调试模式下运行代码时，上面的命令可以正常工作，并且可以获取类实例.但是，运行代码通常会给我以下错误.

The weird thing here is that (I am using pyCharm as IDE). when I run my code in debugging mode the above command works fine and I get my class instance. however running the code normally gives me the following error.

pluginModule = importlib.machinery.SourceFileLoader(pluginModuleName, pluginModulePath).load_module()
AttributeError: 'module' object has no attribute 'machinery'

为什么运行和调试之间会有区别. 有没有一种做我想要的替代方法.

Why is there a difference between run and debug. Is there an alternative way of doing what I want.

我也尝试过

pluginModuleTmp = importlib.util.spec_from_file_location(pluginModuleName, pluginModulePath)

哪个也能给我正确的数据，但是我不能以这种方式加载模块，或者至少我不知道如何

Which also gives me the correct data however I cannot load the module this way or at least I do not know how

问候 安德斯

推荐答案

找到了解决方案.显然，在调试模式下，有更多的模块被导入到我的背后.我通过添加导入对其进行了修复.

Found the solution. Apparently in debug mode a lot more modules are imported behind my back. I fixed it by adding the import.

import importlib.machinery

问候 安德斯

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