[Python-Dev] Object customization (was: Arbitrary attributes on funcs and methods)

[Barry A. Warsaw]

>>>>> "FL" == Fredrik Lundh <effbot@telia.com> writes:

    FL> because people isn't likely to use __doc__ to store
    FL> static variables?

Okay, let's really see how much we can abuse __doc__ today.  I'm
surprised neither Zope nor SPARK are this evil.  Why must I add the
extra level of obfuscating indirection?

Or are we talking about making __doc__ read-only in 1.6, or
restricting it to strings only?

-Barry

-------------------- snip snip --------------------
import sys
print sys.version

def decorate(func):
    class D:
        pass
    doc = func.__doc__
    func.__doc__ = D()
    func.__doc__.__doc__ = doc


def eff():
    "eff"
    print "eff", eff.__doc__.__doc__
decorate(eff)

def bot():
    "bot"
    print "bot", bot.__doc__.__doc__
decorate(bot)

eff.__doc__.publish = 1
bot.__doc__.publish = 0

eff()
bot()

eff, bot = bot, eff

eff()
bot()

for f in (eff, bot):
    print 'Can I publish %s? ... %s' % (f.__name__,
                                        f.__doc__.publish and 'yes' or 'no')
-------------------- snip snip --------------------

% python /tmp/scary.py
1.5.2 (#7, Apr 16 1999, 18:24:22)  [GCC 2.8.1]
eff eff
bot bot
bot eff
eff bot
Can I publish bot? ... no
Can I publish eff? ... yes