Note: the wrappers link with the alsasound library (from the alsa-lib package). Verify that this is installed by looking for /usr/lib/libasound.so before building. Naturally you also need to use a kernel with proper ALSA support. This is the default in Linux kernel 2.6 and later. If you are using kernel version 2.4 you may need to install the ALSA patches yourself - although most distributions ship with ALSA kernels.
To install, execute the following:
$ python setup.py build
And then as root:
# python setup.py install