动态地按名称导入类以进行静态访问 [英] Dynamically import class by name for static access
问题描述
我动态生成类名,然后想要通过其名称导入该类来访问静态方法。
I am generating class names dynamically and then want to import that class by its name to access a static method.
这是在the_module中导入的类。 py:
This is the class to import in "the_module.py":
class ToImport(object):
@classmethod
def initialize(cls, parameter):
print parameter
根据 Blog post 这是我到来的:
theModule = __import__("the_module")
toImport = getattr(theModule, "ToImport")
toImport.initialize("parameter")
但博客示例似乎不完整,因为它给我一个没有我需要的类的模块对象 ToImport
。查看 __ import __()
文档告诉我,函数有更多的可选属性。我成功了
But the blog example seems to be incomplete as it gives me a module object without my desired class ToImport
. Looking at the __import__()
documentation shows me that there are more optional attributes to the function. I succeeded with
theModule = __import__("the_module", globals(), locals(), ["ToImport"])
为什么我必须提供 fromlist
属性?我不能导入所有的模块属性?
Why do I have to give the fromlist
attribute? Can't I import all the modules attributes?
推荐答案
p>
I have done exactly what you did and I retrieved the class.
In [1]: theModule = __import__("the_module")
In [2]: toImport = getattr(theModule, "ToImport")
In [3]: toImport.initialize("parameter")
parameter
我使用的是Python 2.6.4。你能进一步解释一下,到底什么对你不起作用?
I am using Python 2.6.4. Could you explain further, what exactly doesn't work for you?
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