Should hooking the %pdb IPython magic be default? about pudb HOT 4 OPEN

See also #83.

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I'd ask the IPython guys. (Let's try one: hey, @minrk) This depends on what they want in a debugger. If hooking into %pdb is expected, then that's ok, whereas if we're supposed to provide our own %pudb builtin, I suppose that's also fine. We'd just have to figure out what they want in their interface.

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You can do it how you want. The official IPython way to extend IPython is with an extension - any importable module that defines load_ipython_extension(ip) can be loaded with %load_ext module.etc. If it were me, I would define load_ipython_extension(ip) at the top-level in pudb.__init__.py, so users can do %load_ext pudb. I might define a %pudb magic rather than overriding %pdb, but at the same time, I doubt there are any active users of an a specific debugger who don't actually want to use it all the time, so overriding is probably a reasonable thing to do.

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What is the recommended way for something that goes in an IPython profile file?

I'll have to check and see if it is just as easy to make %pudb work instead of %pdb. I'm also not sure if I can make anything happen if they are both called (obviously you can't use both debuggers at the same time, but I'm not even sure if I could make %pudb followed by %pdb raise an error, unless I also redefine %pdb).

It's also worth noting that there already is a %pudb magic, which currently acts like %run -d. But I suppose it could serve a dual purpose.

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