Collecting spanning==1.0.0
  1 location(s) to search for versions of spanning:
  * https://pypi.python.org/simple/spanning/
  Getting page https://pypi.python.org/simple/spanning/
  Analyzing links from page https://pypi.org/simple/spanning/
    Found link https://files.pythonhosted.org/packages/83/5d/00870dadc71e36abb4526372a6f67bdce8060268fed85c8696a58d5fe9b0/spanning-1.0.0-py2.py3-none-any.whl#sha256=14019e6029158e0aeb6bd95d66d5575c954ec32efae0ba71c3bc7543966b6f5e (from https://pypi.org/simple/spanning/), version: 1.0.0
    Found link https://files.pythonhosted.org/packages/df/35/b6ebe23d6c9ae51814bb422b78e5f98a6ad45e949906a0c1659042cd2df4/spanning-1.0.0.tar.gz#sha256=db15601f68ac64b90c34955c05b9fa9ec4e7d8f3bf88fbc7c905cdec229b519b (from https://pypi.org/simple/spanning/), version: 1.0.0
  Using version 1.0.0 (newest of versions: 1.0.0)
  Downloading https://files.pythonhosted.org/packages/83/5d/00870dadc71e36abb4526372a6f67bdce8060268fed85c8696a58d5fe9b0/spanning-1.0.0-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/83/5d/00870dadc71e36abb4526372a6f67bdce8060268fed85c8696a58d5fe9b0/spanning-1.0.0-py2.py3-none-any.whl#sha256=14019e6029158e0aeb6bd95d66d5575c954ec32efae0ba71c3bc7543966b6f5e (from https://pypi.org/simple/spanning/)
  Saved /tmp/tmpf586dmwa/spanning-1.0.0-py2.py3-none-any.whl
Skipping spanning, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-i27kj7_7/spanning