Hi!
I'm in the position that I have a bunch of classes defined before hand
and then in some special circumstances I need to dynamically create a
class that has a number of the static classes as parents.
So I thought I could use classobj() from the new module, it seem exactly
what I wanted.
But, it doesn't perform as I expected.
I've made an extremely simple program to try to show what I mean and
what I expected. It's attached to this mail.
So, how should I have done it ?
-- Roland
#!/usr/bin/env python
class A(object):
def __init__(self):
if "list" in self.__dict__.keys():
self.list.extend(["a","b","c"])
else:
self.list = ["a","b","c"]
self.list.sort()
class B(object):
def __init__(self):
if "list" in self.__dict__.keys():
self.list.extend(["x","y","z"])
else:
self.list = ["x","y","z"]
self.list.sort()
class C(B):
def __init__(self):
B.__init__(self)
if "list" in self.__dict__.keys():
self.list.extend(["0","1","2"])
else:
self.list = ["0","1","2"]
self.list.sort()
class X(C):
def __init__(self):
C.__init__(self)
if "list" in self.__dict__.keys():
self.list.extend(["9","8","7"])
else:
self.list = ["9","8","7"]
self.list.sort()
__test__ = { "a":"""
>>> from new import classobj
>>> c = C()
>>> c.list
['0', '1', '2', 'x', 'y', 'z']
>>> x = X()
>>> x.list
['0', '1', '2', '7', '8', '9', 'x', 'y', 'z']
>>> D = classobj("D",(A,C),{})
>>> d = D()
>>> d.list
['0', '1', '2', '7', '8', '9', 'x', 'y', 'z']
>>> E = classobj("E",(C,A),{})
>>> e = E()
>>> e.list
['0', '1', '2', '7', '8', '9', 'x', 'y', 'z']
"""}
if __name__ == "__main__":
import doctest
doctest.testmod()
--
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