Created temporary directory: /tmp/pip-ephem-wheel-cache-0659q96j
Created temporary directory: /tmp/pip-req-tracker-0rjnrw4h
Created requirements tracker '/tmp/pip-req-tracker-0rjnrw4h'
Created temporary directory: /tmp/pip-wheel-q15pw22r
Collecting molmass==2019.1.1
  1 location(s) to search for versions of molmass:
  * https://pypi.org/simple/molmass/
  Getting page https://pypi.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
    Found link https://files.pythonhosted.org/packages/cd/b8/ccbb477ff8b247c1c2a47811154668d296c7550dd1eddd222735d0119c71/molmass-2018.10.18-py2.py3-none-any.whl#sha256=fa299f5952546b462c1a104314ab4e23c4255259388c4154081e732c5e3fa2f8 (from https://pypi.org/simple/molmass/), version: 2018.10.18
    Found link https://files.pythonhosted.org/packages/c0/9b/f8a3668f7914c7d247ab39c038615054458415772bf51b41aa13a8b883d9/molmass-2018.10.18.tar.gz#sha256=266f60b831c9467183cf6ea531b8a679376af9b4682ef66ef26806e55fdc1ba2 (from https://pypi.org/simple/molmass/), version: 2018.10.18
    Found link https://files.pythonhosted.org/packages/21/e5/a4eac639c4a90ce491bc1d9e8a24779aa16741677a710a5c15dda39e8945/molmass-2019.1.1-py2.py3-none-any.whl#sha256=c264122565f1c2aef3fdc776c911d77ddcbe335aff33008efe438b7f8d7c2519 (from https://pypi.org/simple/molmass/), version: 2019.1.1
    Found link https://files.pythonhosted.org/packages/2d/e6/01b576b79cef7adfeaca6d77c6991b4e6933c3d0985b9db55bf5ac223392/molmass-2019.1.1.tar.gz#sha256=a9b17b8abf7ebb67bff5e55bd8c2053a65626af8d3bbdfe9ef7900dc99f9cfb8 (from https://pypi.org/simple/molmass/), version: 2019.1.1
  Using version 2019.1.1 (newest of versions: 2019.1.1)
  Created temporary directory: /tmp/pip-unpack-0w5fcgtw
  Downloading https://files.pythonhosted.org/packages/21/e5/a4eac639c4a90ce491bc1d9e8a24779aa16741677a710a5c15dda39e8945/molmass-2019.1.1-py2.py3-none-any.whl (63kB)
  Downloading from URL https://files.pythonhosted.org/packages/21/e5/a4eac639c4a90ce491bc1d9e8a24779aa16741677a710a5c15dda39e8945/molmass-2019.1.1-py2.py3-none-any.whl#sha256=c264122565f1c2aef3fdc776c911d77ddcbe335aff33008efe438b7f8d7c2519 (from https://pypi.org/simple/molmass/)
  Saved /tmp/tmp9ud_jues/molmass-2019.1.1-py2.py3-none-any.whl
  Added molmass==2019.1.1 from https://files.pythonhosted.org/packages/21/e5/a4eac639c4a90ce491bc1d9e8a24779aa16741677a710a5c15dda39e8945/molmass-2019.1.1-py2.py3-none-any.whl#sha256=c264122565f1c2aef3fdc776c911d77ddcbe335aff33008efe438b7f8d7c2519 to build tracker '/tmp/pip-req-tracker-0rjnrw4h'
  Removed molmass==2019.1.1 from https://files.pythonhosted.org/packages/21/e5/a4eac639c4a90ce491bc1d9e8a24779aa16741677a710a5c15dda39e8945/molmass-2019.1.1-py2.py3-none-any.whl#sha256=c264122565f1c2aef3fdc776c911d77ddcbe335aff33008efe438b7f8d7c2519 from build tracker '/tmp/pip-req-tracker-0rjnrw4h'
Skipping molmass, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-q15pw22r/molmass
Removed build tracker '/tmp/pip-req-tracker-0rjnrw4h'