Created temporary directory: /tmp/pip-ephem-wheel-cache-8rh46yfo
Created temporary directory: /tmp/pip-req-tracker-2r7h_39c
Created requirements tracker '/tmp/pip-req-tracker-2r7h_39c'
Created temporary directory: /tmp/pip-wheel-5z9qvdbp
Looking in indexes: https://pypi.python.org/simple
Collecting optlang==1.4.3
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  Getting page https://pypi.python.org/simple/optlang/
  Analyzing links from page https://pypi.org/simple/optlang/
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  Using version 1.4.3 (newest of versions: 1.4.3)
  Created temporary directory: /tmp/pip-unpack-eqhx0wud
  Downloading https://files.pythonhosted.org/packages/7b/78/4492435999ff24f27b5298e681d77f0bb5efd6ee36273907e4daa71fa856/optlang-1.4.3-py2.py3-none-any.whl (121kB)
  Downloading from URL https://files.pythonhosted.org/packages/7b/78/4492435999ff24f27b5298e681d77f0bb5efd6ee36273907e4daa71fa856/optlang-1.4.3-py2.py3-none-any.whl#sha256=a56cd33516aef427ccc4a914fe003fe83c4cf0c6884bd8efc1b7197e6ff039f0 (from https://pypi.org/simple/optlang/)
  Saved /tmp/tmpe1ecsaof/optlang-1.4.3-py2.py3-none-any.whl
  Added optlang==1.4.3 from https://files.pythonhosted.org/packages/7b/78/4492435999ff24f27b5298e681d77f0bb5efd6ee36273907e4daa71fa856/optlang-1.4.3-py2.py3-none-any.whl#sha256=a56cd33516aef427ccc4a914fe003fe83c4cf0c6884bd8efc1b7197e6ff039f0 to build tracker '/tmp/pip-req-tracker-2r7h_39c'
  Removed optlang==1.4.3 from https://files.pythonhosted.org/packages/7b/78/4492435999ff24f27b5298e681d77f0bb5efd6ee36273907e4daa71fa856/optlang-1.4.3-py2.py3-none-any.whl#sha256=a56cd33516aef427ccc4a914fe003fe83c4cf0c6884bd8efc1b7197e6ff039f0 from build tracker '/tmp/pip-req-tracker-2r7h_39c'
Skipping optlang, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-5z9qvdbp/optlang
Removed build tracker '/tmp/pip-req-tracker-2r7h_39c'