lldb python error

It looks like you installed /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/readline.so at some point on your system (I don't see it on my Mac OS X 10.7.5 installation, although maybe it's included in 10.8), and that dylib is only built 32-bit. You can confirm with

file /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/readline.so

on your system. You could try to force lldb to also run in 32-bit mode (the distribution binary is built 32-/64- universal) but instead I would recommend removing that 32-bit-only readline.so from your system unless you really need it there.