I'm creating a cmd.Cmd class, and I have developed a helper method to easily
handle help_xxx methods.
I'm trying to figure out if there is an even lazier way I could do this with
decorators.
Here is the code:
*********************
import cmd
def add_help(func):
if not hasattr(func, 'im_class'):
return func #probably should raise an error
cls = func.im_class
setattr(cls, func.im_func.__name__.replace("do","help"), None)
return func
class BaseCmd(cmd.Cmd):
def __init__(self, *args, **kwargs):
cmd.Cmd.__init__(self, *args, **kwargs)
def show_help(self, func):
print "\n".join((line.strip() for line in func.__doc__.splitlines()))
@add_help
def do_done(self, line):
"""done
Quits this and goes to higher level or quits the application.
I mean, what else do you expect?
"""
return True
if __name__=='__main__':
c = BaseCmd()
print c.help_done
*********************
This generates "AttributeError: BaseCmd instance has no attribute 'help_done'"
The show_help method is the shortcut I want to use (I'm pretty sure it's from
Doug Hellman's site). I'm wondering if it's possible to use a decorator such as
add_help to automatically create the appropriate help_xxx function.
In the decorator, I can get the function and the name of the class, but I can't
find the instance of the class that the method is attached to. Maybe this is
just one step of lazy too far.
Am I right in thinking that I can't do this? There is no way to access the
class instance from the method?
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