On yum update, I see yum is trying to install the following packages because of dependency:
python3 x86_64 3.6.8-13.el7 base 69 k
python3-libs x86_64 3.6.8-13.el7 base 7.0 M
python3-pip noarch 9.0.3-7.el7_7 updates 1.8 M
python3-setuptools noarch 39.2.0-10.el7 base 629 k
but on running transaction test, I got lot of errors like this one:
file /usr/lib64/python3.6/xml/sax/__pycache__/handler.cpython-36.pyc from install of python3-libs-3.6.8-13.el7.x86_64 conflicts with file from package python36u-libs-3.6.8-1.el7.ius.x86_64
file /usr/lib64/python3.6/xml/sax/__pycache__/saxutils.cpython-36.opt-1.pyc from install of python3-libs-3.6.8-13.el7.x86_64 conflicts with file from package python36u-libs-3.6.8-1.el7.ius.x86_64
file /usr/lib64/python3.6/xml/sax/__pycache__/saxutils.cpython-36.pyc from install of python3-libs-3.6.8-13.el7.x86_64 conflicts with file from package python36u-libs-3.6.8-1.el7.ius.x86_64
file /usr/lib64/python3.6/xml/sax/__pycache__/xmlreader.cpython-36.opt-1.pyc from install of python3-libs-3.6.8-13.el7.x86_64 conflicts with file from package python36u-libs-3.6.8-1.el7.ius.x86_64
file /usr/lib64/python3.6/xml/sax/__pycache__/xmlreader.cpython-36.pyc from install of python3-libs-3.6.8-13.el7.x86_64 conflicts with file from package python36u-libs-3.6.8-1.el7.ius.x86_64
It seems cwp installed python36u.x86_64 3.6.8-1.el7.ius which is in conflict with the regulare centos update.
# yum list python34* python35* python36* python34u* python35u* python36u* -q | tr -s ' ' | column -t
Installed packages
python36u.x86_64 3.6.8-1.el7.ius @cwp
python36u-libs.x86_64 3.6.8-1.el7.ius @cwp
Available packages
python34.x86_64 3.4.10-4.el7 epel
python34-Cython.x86_64 0.28.5-1.el7 epel
python34-HepMC3.x86_64 3.2.1-2.el7 epel
python34-HepMC3-rootIO.x86_64 3.2.1-2.el7 epel
python34-HepMC3-search.x86_64 3.2.1-2.el7 epel
python34-PyYAML.x86_64 3.12-1.el7 epel
python34-apsw.x86_64 3.7.17.r1-3.el7 epel
python34-argcomplete.noarch 1.7.0-4.el7 epel
python34-asn1crypto.noarch 0.24.0-7.el7 epel
python34-backports-ssl_match_hostname.noarch
3.5.0.1-1.el7 epel
python34-blosc.x86_64 1.2.8-5.el7 epel
python34-bottle.noarch 0.12.13-3.el7 epel
python34-bsddb3.x86_64 6.2.6-4.el7 epel
python34-certifi.noarch 2018.10.15-5.el7 epel
python34-chardet.noarch 3.0.4-1.el7 epel
python34-click.noarch 6.7-8.el7 epel
python34-coverage.x86_64 4.0.3-5.el7 epel
python34-cups.x86_64 1.9.74-4.el7 epel
python34-dateutil.noarch 1:2.4.2-5.el7 epel
python34-debug.x86_64 3.4.10-4.el7 epel
python34-devel.x86_64 3.4.10-4.el7 epel
python34-docutils.noarch 0.14-1.el7 epel
python34-empy.noarch 3.3.3-2.el7 epel
python34-httmock.noarch 1.2.6-2.el7 epel
python34-idna.noarch 2.7-2.el7 epel
python34-iso3166.noarch 1.0.1-1.el7 epel
python34-jinja2.noarch 2.11.1-1.el7 epel
python34-jsmva.noarch 6.20.04-1.el7 epel
python34-jupyroot.x86_64 6.20.04-1.el7 epel
python34-lark-parser.noarch 0.7.1-1.el7 epel
python34-leveldb.x86_64 0.194-2.el7 epel
python34-lhapdf.x86_64 6.2.1-6.el7 epel
python34-libs.x86_64 3.4.10-4.el7 epel
python34-markdown.noarch 2.4.1-4.el7 epel
python34-markupsafe.x86_64 0.23-3.el7 epel
python34-mock.noarch 2.0.0-2.el7 epel
python34-nose.noarch 1.3.7-4.el7 epel
python34-numpy.x86_64 1.12.1-3.el7 epel
python34-numpy-f2py.x86_64 1.12.1-3.el7 epel
python34-parso.noarch 0.3.1-2.el7 epel
python34-pbr.noarch 4.2.0-3.el7 epel
python34-pip.noarch 8.1.2-12.el7 epel
python34-prelude.x86_64 5.1.1-1.el7 epel
python34-preludedb.x86_64 5.1.0-2.el7 epel
python34-prettytable.noarch 0.7.2-19.el7 epel
python34-process-tests.noarch 1.0.0-11.el7 epel
python34-psutil.x86_64 5.6.7-1.el7 epel
python34-psycopg2.x86_64 2.7.7-2.el7 epel
python34-psycopg2-tests.x86_64 2.7.7-2.el7 epel
python34-py.noarch 1.4.32-2.el7 epel
python34-py4j.noarch 0.10.7-4.el7 epel
python34-pycryptodomex.x86_64 3.9.7-1.el7 epel
python34-pycurl.x86_64 7.43.0-7.el7 epel
python34-pygments.noarch 2.2.0-3.el7 epel
python34-pygraphviz.x86_64 1.3-2.rc2.el7.2 epel
python34-pyscard.x86_64 1.9.7-1.el7 epel
python34-pysocks.noarch 1.6.8-7.el7 epel
python34-pytest.noarch 2.9.2-4.el7 epel
python34-pytest-cov.noarch 2.5.1-3.el7 epel
python34-pythia8.x86_64 8.2.43-1.el7 epel
python34-pyvirtualize.noarch 0.10-2.20191018gitdc2d971.el7 epel
python34-pyvmomi.noarch 6.7.3-4.el7 epel
python34-requests.noarch 2.14.2-2.el7 epel
python34-rfc3986.noarch 1.3.0-1.el7 epel
python34-root.x86_64 6.20.04-1.el7 epel
python34-setuptools.noarch 39.2.0-4.el7 epel
python34-setuptools_scm.noarch 1.17.0-3.el7 epel
python34-slack_cleaner.noarch 0.5.0-2.el7 epel
python34-slacker.noarch 0.12.0-4.el7 epel
python34-snowballstemmer.noarch 1.2.1-9.el7 epel
python34-sphinx.noarch 1.2.3-6.el7 epel
python34-sphinx-latex.noarch 1.2.3-6.el7 epel
python34-sqlalchemy.x86_64 1.1.3-3.el7 epel
python34-tabulate.noarch 0.8.3-8.el7 epel
python34-test.x86_64 3.4.10-4.el7 epel
python34-tkinter.x86_64 3.4.10-4.el7 epel
python34-tools.x86_64 3.4.10-4.el7 epel
python34-urllib3.noarch 1.25.6-1.el7 epel
python34-uwsgidecorators.x86_64 2.0.17.1-2.el7 epel
python34-virtualenv.noarch 15.1.0-5.el7 epel
python34-whoosh.noarch 2.7.4-5.el7 epel
python34-xrootd.x86_64 1:4.11.3-1.el7 epel
python36-Cython.x86_64 0.28.5-1.el7 epel
python36-GitPython.noarch 1.0.1-8.el7 epel
python36-HepMC3.x86_64 3.2.1-2.el7 epel
python36-HepMC3-rootIO.x86_64 3.2.1-2.el7 epel
python36-HepMC3-search.x86_64 3.2.1-2.el7 epel
python36-PyMySQL.noarch 0.9.3-1.el7 epel
python36-PyYAML.x86_64 3.12-1.el7 epel
python36-SecretStorage.noarch 2.1.1-2.el7 epel
python36-abimap.noarch 0.3.1-3.el7 epel
<cut the rest of the python36 package>