64 bit Python
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NOTE: This is no longer necessary with Snow Leopard.

To compile 64 bit python on Mac 

$ env CFLAGS='-arch x86_64' CPPFLAGS='-arch x86_64' LDFLAGS='-arch x86_64' \
./configure --disable-toolbox-glue --prefix=/usr/local64
$ make
$ make install

or 

$ CC='gcc -m64' LDFLAGS=-m64 ./configure --disable-toolbox-glue --prefix=/usr/local64
Python.Mac