Allow help() to work on partial function object

I found a pretty hacky way to do this. I wrote the following function to override the __builtins__.help function:

def partialhelper(object=None):
    if isinstance(object, functools.partial):
        return pydoc.help(object.func)
    else:
        # Preserve the ability to go into interactive help if user calls
        # help() with no arguments.
        if object is None:
            return pydoc.help()
        else:
            return pydoc.help(object)

Then just replace it in the REPL with:

__builtins__.help = partialhelper

This works and doesn't seem to have any major downsides, yet. However, there isn't a way with the above naive implementation to support still showing the __doc__ of some functools.partial objects. It's all or nothing, but could probably attach an attribute to the wrapped (original) function to indicate whether or not the original __doc__ should be shown. However, in my scenario I never want to do this.

Note the above does NOT work when using IPython and the embed functionality. This is because IPython directly sets the shell's namespace with references to the 'real' __builtin__, see the code and old mailing list for information on why this is.

So, after some investigation there's another way to hack this into IPython. We must override the site._Helper class, which is used by IPython to explicitly setup the help system. The following code will do just that when called BEFORE IPython.embed:

import site
site._Helper.__call__ = lambda self, *args, **kwargs: partialhelper(*args, **kwargs)

Are there any other downsides I'm missing here?