pip install awscli failing in Software Collections Python 2.7 with "AttributeError: 'NoneType' object has no attribute 'digest_size'"

Issue

• Receiving the following traceback when attempting to install awscli with pip in Python 2.7 environment

# pip install awscli
You are using pip version 7.1.0, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting awscli
  Unsupported hash name md5 for package https://pypi.python.org/packages/9a/6c/a4e81e1eec2c22c8421a849ed6287c839068052251c32c0501141f789f30/awscli-1.11.23-py2.py3-none-any.whl#md5=c047d991207719873badd9c05fd6de82 (from https://pypi.python.org/simple/awscli/)
  Using cached awscli-1.11.23-py2.py3-none-any.whl
Exception:
Traceback (most recent call last):
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/basecommand.py", line 223, in main
    status = self.run(options, args)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/commands/install.py", line 301, in run
    wb.build(autobuilding=True)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/wheel.py", line 707, in build
    self.requirement_set.prepare_files(self.finder)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 334, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 321, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 491, in _prepare_file
    session=self.session)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/download.py", line 825, in unpack_url
    session,
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/download.py", line 673, in unpack_http_url
    from_path, content_type = _download_http_url(link, session, temp_dir)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/download.py", line 886, in _download_http_url
    _download_url(resp, link, content_file)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/download.py", line 626, in _download_url
    _check_hash(download_hash, link)
  File "/opt/rh/python27/root/usr/lib/python2.7/site-packages/pip/download.py", line 489, in _check_hash
    if download_hash.digest_size != hashlib.new(link.hash_name).digest_size:
AttributeError: 'NoneType' object has no attribute 'digest_size'

• Issue persists when pip is updated as suggested