Collecting calculation==2.0
  1 location(s) to search for versions of calculation:
  * https://pypi.python.org/simple/calculation/
  Getting page https://pypi.python.org/simple/calculation/
  Analyzing links from page https://pypi.python.org/simple/calculation/
    Found link https://pypi.python.org/packages/57/b8/32a1f168918459ba40947db42d7ef4db35ee87d5948d1c5f8bbc45a376dd/calculation-2.0.tar.gz#md5=503e6e3dbcbaa51f10608c064b253f58 (from https://pypi.python.org/simple/calculation/), version: 2.0
    Found link https://pypi.python.org/packages/66/e7/b725df307aaa250727957c0f78a8c53d81f1535df564105f972dfc7d194f/calculation-1.0-py2.py3-none-any.whl#md5=e593682dcd495e981d977faab53005e2 (from https://pypi.python.org/simple/calculation/), version: 1.0
    Found link https://pypi.python.org/packages/a4/d0/722bb75b45fa811e12d1c7e2af4322ac147613674cacad0d1953633cce06/calculation-2.0-py2.py3-none-any.whl#md5=6fd861b9075eea4d25be19ac2814bfb5 (from https://pypi.python.org/simple/calculation/), version: 2.0
    Found link https://pypi.python.org/packages/c5/da/e5039b28fc59a715c39e51768375c91e57f0bc227a6db27467571b367f46/calculation-1.0.tar.gz#md5=4063d2988341635e45382f4534782846 (from https://pypi.python.org/simple/calculation/), version: 1.0
  Using version 2.0 (newest of versions: 2.0)
  Downloading calculation-2.0-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/a4/d0/722bb75b45fa811e12d1c7e2af4322ac147613674cacad0d1953633cce06/calculation-2.0-py2.py3-none-any.whl#md5=6fd861b9075eea4d25be19ac2814bfb5 (from https://pypi.python.org/simple/calculation/)
  Saved /tmp/tmpga_kd64b/calculation-2.0-py2.py3-none-any.whl
Skipping calculation, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-klbxqx51/calculation