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Yaml.load() return Python object may be dangerous if you receive a YAML document from an untrusted source such as the Internet. The function yaml.safe_load() limits this ability to simple Python objects like integers or lists. Reference: https://security.openstack.org/guidelines/dg_avoid-dangerous-input-parsing-libraries.html Change-Id: Ie3e632bef72f02f7895b6d46215111b8dc4d3a6a