On Thu, Sep 30, 2010 at 6:54 PM, tekion <tek...@gmail.com> wrote: > All, > I have file name A.py with a class name Aclass. I have a file name > B.py with sub class of Aclass, like > import A > class Bclass(Aclass) > ...rest of code > When I test it, calling B.py, I am getting: > > class Bclas(Aclass): > NameError: name 'Aclass' is not defined > > When I move Bclass to A.py, it works. Is there some restriction in > python that sub classing a class has be in the same file as the class > you're are sub classing? Thanks.
"import A" *only* imports the name "A" into B's namespace; names within A.py are not directly imported and can only be referenced using the dot operator on A (i.e. "A.Aclass"). "from A import *" takes all the names defined in A.py and imports them into B's namespace (which is apparently what you expected "import A" to do), but this is frowned upon as it can pollute B's namespace. You should probably either do "from A import Aclass" (i.e. explicitly specifying which names from A you want), or instead refer to Aclass in B.py using "A.Aclass" (i.e. "class Bclass(A.Aclass)"). Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
