Collecting db4==0.1.0
  1 location(s) to search for versions of db4:
  * https://pypi.python.org/simple/db4/
  Getting page https://pypi.python.org/simple/db4/
  Analyzing links from page https://pypi.org/simple/db4/
    Found link https://files.pythonhosted.org/packages/a9/63/db87493acc9ddc343090384ba6982cf03758aee52a87a140635b3eec39b8/db4-0.1.0-py2.py3-none-any.whl#sha256=239ad8bbce7d2527f697e654a46336b2a9f65883ed4a9e260f050b39db5f673c (from https://pypi.org/simple/db4/), version: 0.1.0
  Using version 0.1.0 (newest of versions: 0.1.0)
  Downloading https://files.pythonhosted.org/packages/a9/63/db87493acc9ddc343090384ba6982cf03758aee52a87a140635b3eec39b8/db4-0.1.0-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/a9/63/db87493acc9ddc343090384ba6982cf03758aee52a87a140635b3eec39b8/db4-0.1.0-py2.py3-none-any.whl#sha256=239ad8bbce7d2527f697e654a46336b2a9f65883ed4a9e260f050b39db5f673c (from https://pypi.org/simple/db4/)
  Saved /tmp/tmpzrznasw5/db4-0.1.0-py2.py3-none-any.whl
Skipping db4, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-a0namuoy/db4