On Sat, 21 Feb 2009 01:12:01 -0000, Darren Dale <dsdal...@gmail.com> wrote:
I would like to assert that a method accepts certain types. I have a
short example that works:
from functools import wraps
def accepts(*types):
def check_accepts(f):
@wraps(f)
def new_f(self, other):
assert isinstance(other, types), \
"arg %r does not match %s" % (other, types)
return f(self, other)
return new_f
return check_accepts
class Test(object):
@accepts(int)
def check(self, obj):
print obj
t = Test()
t.check(1)
but now I want Test.check to accept an instance of Test as well. Does
anyone know how this can be accomplished? The following class
definition for Test raises a NameError:
class Test(object):
@accepts(int, Test)
def check(self, obj):
print obj
An icky but relatively clear way to get around this is to gratuitously
subclass Test:
class AcceptableTest(object):
pass
class Test(AcceptableTest):
@accepts(int, AcceptableTest)
def check(self, obj):
print obj
--
Rhodri James *-* Wildebeeste Herder to the Masses
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