pip install simplejson
Collecting simplejson
  Downloading https://files.pythonhosted.org/packages/e3/24/c35fb1c1c315fc0fffe61ea00d3f88e85469004713dab488dee4f35b0aff/simplejson-3.16.0.tar.gz (81kB)
    100% |████████████████████████████████| 81kB 1.5MB/s eta 0:00:01
Building wheels for collected packages: simplejson
  Running setup.py bdist_wheel for simplejson ... error
  Complete output from command /srv/paws/bin/python3.6 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-a9d3_pqi/simplejson/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmp5ok23brmpip-wheel- --python-tag cp36:
  usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
     or: -c --help [cmd1 cmd2 ...]
     or: -c --help-commands
     or: -c cmd --help
  
  error: invalid command 'bdist_wheel'
  
  ----------------------------------------
  Failed building wheel for simplejson
  Running setup.py clean for simplejson
Failed to build simplejson
Installing collected packages: simplejson
  Running setup.py install for simplejson ... done
Successfully installed simplejson-3.16.0
pip freeze | grep rdf
Warning: cannot find svn location for nosetrim===0.1.dev-r0
rdflib==4.2.2