Install net-snmp5.5 and python module on CentOS5 note Install needed packages:
yum install python-devel
yum groupinstall "Development Tools"
ln -s /usr/lib/libnetsnmp.so.10 /usr/lib/libnetsnmp.so.20
wget http://pypi.python.org/packages/2.4/s/setuptools/setuptools-0.6c11-py2.4.egg#md5=bd639f9b0eac4c42497034dec2ec0c2b
sh setuptools-0.6c11-py2.4.egg

Install net-snmp:
wget http://downloads.sourceforge.net/project/net-snmp/net-snmp/5.5/net-snmp-5.5.tar.gz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fnet-snmp%2Ffiles%2Fnet-snmp%2F5.5%2F&ts=1285562293&use_mirror=nchc
tar -vzxf net-snmp-5.5.tar.gz
cd net-snmp-5.5
./configure
make
make install

Install python module:
cd python/
python setup.py build
python setup.py install  ¶ 5:16 PM