Created temporary directory: /tmp/pip-ephem-wheel-cache-jb_44bqm
Created temporary directory: /tmp/pip-req-tracker-cdjs1c1c
Created requirements tracker '/tmp/pip-req-tracker-cdjs1c1c'
Created temporary directory: /tmp/pip-wheel-x1yn1u9h
Looking in indexes: https://pypi.python.org/simple
Collecting molmass==2018.8.15
  1 location(s) to search for versions of molmass:
  * https://pypi.python.org/simple/molmass/
  Getting page https://pypi.python.org/simple/molmass/
  Analyzing links from page https://pypi.org/simple/molmass/
    Found link https://files.pythonhosted.org/packages/16/22/d19375b980699d3b0e4d76e828f7d395294077a537be12156c24c2d5625a/molmass-2018.8.15-py2.py3-none-any.whl#sha256=d7b63ff2921b21f282c284fcec8321f3c92ce0168997723284c7078aae473e73 (from https://pypi.org/simple/molmass/), version: 2018.8.15
    Found link https://files.pythonhosted.org/packages/7d/f5/5568064bbcb04381bb2b4e9dbb37227d47f668adbf1362c42ada1a09745e/molmass-2018.8.15.tar.gz#sha256=ab36939d4d9b33cfb2e8a77b389cdcd1bbad5bde823fe61f80c42e9c69587aea (from https://pypi.org/simple/molmass/), version: 2018.8.15
  Using version 2018.8.15 (newest of versions: 2018.8.15)
  Created temporary directory: /tmp/pip-unpack-9lx8fo5z
  Downloading https://files.pythonhosted.org/packages/16/22/d19375b980699d3b0e4d76e828f7d395294077a537be12156c24c2d5625a/molmass-2018.8.15-py2.py3-none-any.whl (62kB)
  Downloading from URL https://files.pythonhosted.org/packages/16/22/d19375b980699d3b0e4d76e828f7d395294077a537be12156c24c2d5625a/molmass-2018.8.15-py2.py3-none-any.whl#sha256=d7b63ff2921b21f282c284fcec8321f3c92ce0168997723284c7078aae473e73 (from https://pypi.org/simple/molmass/)
  Saved /tmp/tmp6xpxgdvv/molmass-2018.8.15-py2.py3-none-any.whl
  Added molmass==2018.8.15 from https://files.pythonhosted.org/packages/16/22/d19375b980699d3b0e4d76e828f7d395294077a537be12156c24c2d5625a/molmass-2018.8.15-py2.py3-none-any.whl#sha256=d7b63ff2921b21f282c284fcec8321f3c92ce0168997723284c7078aae473e73 to build tracker '/tmp/pip-req-tracker-cdjs1c1c'
  Removed molmass==2018.8.15 from https://files.pythonhosted.org/packages/16/22/d19375b980699d3b0e4d76e828f7d395294077a537be12156c24c2d5625a/molmass-2018.8.15-py2.py3-none-any.whl#sha256=d7b63ff2921b21f282c284fcec8321f3c92ce0168997723284c7078aae473e73 from build tracker '/tmp/pip-req-tracker-cdjs1c1c'
Skipping molmass, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-x1yn1u9h/molmass
Removed build tracker '/tmp/pip-req-tracker-cdjs1c1c'