Semanage command fails with 'module 'pkg_resources' has no attribute 'get_distribution'

Issue

• While executing semanage command, it fails with following error:

[root@xxx xxxxx]# semanage fcontext -a -t httpd_sys_content_t /etc/nginx/ header_hash.js
Traceback (most recent call last):
  File "/sbin/semanage", line 1000, in <module>
    do_parser()
  File "/sbin/semanage", line 970, in do_parser
    commandParser = createCommandParser()
  File "/sbin/semanage", line 900, in createCommandParser
    import seobject
  File "/usr/lib/python3.6/site-packages/seobject.py", line 33, in <module>
    import sepolicy
  File "/usr/lib/python3.6/site-packages/sepolicy/__init__.py", line 7, in <module>
    import setools
  File "/usr/lib64/python3.6/site-packages/setools/__init__.py", line 24, in <module>
    __version__ = pkg_resources.get_distribution("setools").version
AttributeError: module 'pkg_resources' has no attribute 'get_distribution'