OMD: python problem after CentOS yum update

After yum update I got a problem, related to python, with check_mk in the OMD implementation.

Environment:

• CentOS 7
• check_mk 1.2.4p5
• omd-1.20

In the check_mk web page you can see a lot of messages like this in each "Check_MK inventory" check.

(Return code of 5 is out of bounds)

and if you issue the check_mk command you get

Cannot read file /omd/sites/prod/share/check_mk/modules/check_mk_base.py: 'frozenset' object is not callable

My solution was:

cp /omd/versions/1.20/lib/python/hashlib.py /omd/versions/1.20/lib/python/hashlib.py.OLD

cp /usr/lib64/python2.7/hashlib.py /omd/versions/1.20/lib/python/hashlib.py