createrepo -g repodata/repomd.xml /home/OS
Traceback (most recent call last):
  File "/usr/share/createrepo/genpkgmetadata.py", line 28, in <module>
    import createrepo
  File "/usr/lib/python2.6/site-packages/createrepo/__init__.py", line 19, in <module>
    import libxml2
  File "/usr/lib/python2.6/site-packages/libxml2.py", line 1, in <module>
    import libxml2mod
ImportError: /usr/lib/python2.6/site-packages/libxml2mod.so: wrong ELF class: ELFCLASS32

yum install python*

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