blob: 811040c02095412dda10d93cf4de665a49fa3115 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
from oopp import *
class Final(Singleton,type):
"Inherits the 'instance' attribute from Singleton (default None)"
def __new__(meta,name,bases,dic):
if meta.counter==0: # first call
return super(Final,meta).__new__(meta,name,bases,dic)
else:
raise NonDerivableError("I cannot derive from %s" % bases)
class C: __metaclass__=Final
try:
class D(C): pass
except NonDerivableError,e:
print e
|
