动态导入模块，然后从所述模块实例化具有特定基类的对象

您可能会执行以下 *** 作：

for c in candidates:    modname = os.path.splitext(c)[0]    try:        module=__import__(modname)   #<-- You can get the module this way    except (importError,NotImplementedError):        continue    for cls in dir(module):          #<-- Loop over all objects in the module's namespace        cls=getattr(module,cls)        if (inspect.isclass(cls)     # Make sure it is a class  and inspect.getmodule(cls)==module  # Make sure it was defined in module, not just imported and issubclass(cls,base)):          # Make sure it is a subclass of base # print('found in {f}: {c}'.format(f=module.__name__,c=cls)) classList.append(cls)

为了测试以上内容，我不得不对您的代码进行一些修改；以下是完整的脚本。

import sysimport inspectimport osclass Pluginbase(object): passdef search(base):    for root, dirs, files in os.walk('.'):        candidates = [fname for fname in files if fname.endswith('.py') and not fname.startswith('__')]        classList=[]        if candidates: for c in candidates:     modname = os.path.splitext(c)[0]     try:         module=__import__(modname)     except (importError,NotImplementedError):         continue     for cls in dir(module):         cls=getattr(module,cls)         if (inspect.isclass(cls)  and inspect.getmodule(cls)==module  and issubclass(cls,base)):  # print('found in {f}: {c}'.format(f=module.__name__,c=cls))  classList.append(cls)        print(classList)search(Pluginbase)