Для SLE 11 SP4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Tools/SLE_11_SP4/openSUSE:Tools.repo
zypper refresh
zypper install python-six
Для SLE 11 SP3 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Tools/SLE_11_SP3/openSUSE:Tools.repo
zypper refresh
zypper install python-six
Для SLE 11 SP2 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Tools/SLE_11_SP2/openSUSE:Tools.repo
zypper refresh
zypper install python-six