Hi Tim,
Either -
class test:
def __init__(self,v):
self.__val = v
def val(self):
print self.__val
class sub(test):
def __init__(self, v):
test.__init__(v)
self.val()
or -
class sub(test):
def __init__(self, v):
test.__init__(v)
test.val()
That will resolve your calling the method problem, but self.__val won't
inherit (I think). I don't recommend using double underscored variables
unless there's a really good reason, C# et al be damned.
Oh, and if self.__val / val is set by the superclasses __init__ method, then
you'll need to call it specifically, or otherwise you'll get a
UnboundLocalError, because self.__val/val won't exist.
Liam Clarke-Hutchinson
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Tim Johnson
Sent: Thursday, 1 December 2005 3:46 p.m.
To: tutor@python.org
Subject: [Tutor] Class Inheritance -> NameError
The following code snippet is meant to test inheritance:
class test:
def __init__(self,v):
self.__val = v
def val(self):
print self.__val
class sub(test):
def __init__(self):
val()
The following console session has an error:
>>> T = mylib.test('hello')
>>> s = mylib.sub()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "mylib.py", line 1612, in __init__
val()
NameError: global name 'val' is not defined
## what do I need to do to make the 'test method visible
## class 'sub?
thanks
tim
--
Tim Johnson <[EMAIL PROTECTED]>
http://www.alaska-internet-solutions.com
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