Steven D'Aprano schrieb:
On Mon, 05 Oct 2009 23:32:27 -0700, gentlestone wrote:
Suppose I've saved the class name and (don't know how) I've also saved
the Class's module (package path or I don't know what's the name for XYZ
"from X.Y.Z import ...). How can I construct a new class according to
saved informations? If I don't know what Class it could be, only I have
the saved Class name?
If you have the module *object*, and the name of the class, then you can
do this:
theclass = getattr(module, "MyClass")
to get the class itself, and then call it as normal to instantiate it:
instance = theclass(args)
Classes are just like any other object in that regard.
If you have the *name* of the module, you can import it first to get the
module object:
module = __import__('module_name')
Not working for modules in packages, it will return the toplevel module
only. I never remember if there is a convenience-function, what I
usually do is this:
module = __import__(module_name)
for part in module_name.split(".")[1:]:
module = getattr(module, part)
Diez
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