newrelic-plugin-agent issue on linux server

[bosekin]

We followed the instruction for Apache HTTPd plugin on our Linux servers but the installation shows python runtime errors on the package file - newrelic_plugin_agent-1.3.0.tar.gz.(i.e errors are shown below).
Our environment details are:

• Python version: Python 2.6
• Linux OS version: redhat-release-server-6Server-6.9.0.4.el6.x86_64
• The command that we use is, pip install newrelic-plugin-agent
  Could you please help to overcome the below error?
  Error Details:
  [root@ushpelvlbr003 newrelic_plugin_agent-1.3.0]# pip install newrelic-plugin-agent
  Collecting newrelic-plugin-agent
  Using cached newrelic_plugin_agent-1.3.0.tar.gz
  Collecting helper>=2.2.2 (from newrelic-plugin-agent)
  Using cached helper-2.4.2-py2.py3-none-any.whl
  Collecting requests>=2.0.0 (from newrelic-plugin-agent)
  Using cached requests-2.18.4-py2.py3-none-any.whl
  Collecting importlib (from newrelic-plugin-agent)
  Using cached importlib-1.0.4.zip
  Collecting logutils; python_version == "2.6" (from helper>=2.2.2->newrelic-plugin-agent)
  Using cached logutils-0.3.5.tar.gz
  Collecting pyyaml (from helper>=2.2.2->newrelic-plugin-agent)
  Using cached PyYAML-3.12.tar.gz
  Complete output from command python setup.py egg_info:
  Traceback (most recent call last):
  File "", line 1, in
  File "/tmp/pip-build-ZkjfdB/pyyaml/setup.py", line 83, in
  from wheel.bdist_wheel import bdist_wheel
  File "/usr/lib/python2.6/site-packages/wheel/bdist_wheel.py", line 407
  ignore=lambda x, y: {'PKG-INFO', 'requires.txt', 'SOURCES.txt',
  ^
  SyntaxError: invalid syntax

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Thanks,
Kingsly