Collecting callspect==0.1.0
  1 location(s) to search for versions of callspect:
  * https://pypi.python.org/simple/callspect/
  Getting page https://pypi.python.org/simple/callspect/
  Analyzing links from page https://pypi.python.org/simple/callspect/
    Found link https://pypi.python.org/packages/3e/8c/2b192bc31a1839e7923ab7b456976dd5df1f00a48c55294ae004d0a669c8/callspect-0.1.0.tar.gz#md5=e1c2a2e15fb6e6ac7ab8d760afe340b0 (from https://pypi.python.org/simple/callspect/) (requires-python:>=3.5), version: 0.1.0
    Found link https://pypi.python.org/packages/93/95/af15de540eeecfd2a8f3f08592b2db1baf4464d439e903a34cfb8aa235b7/callspect-0.1.0-py3-none-any.whl#md5=d77a3fa6bf5556439a95acd592a3edb2 (from https://pypi.python.org/simple/callspect/) (requires-python:>=3.5), version: 0.1.0
  Using version 0.1.0 (newest of versions: 0.1.0)
  Downloading callspect-0.1.0-py3-none-any.whl (2.3MB)
  Downloading from URL https://pypi.python.org/packages/93/95/af15de540eeecfd2a8f3f08592b2db1baf4464d439e903a34cfb8aa235b7/callspect-0.1.0-py3-none-any.whl#md5=d77a3fa6bf5556439a95acd592a3edb2 (from https://pypi.python.org/simple/callspect/) (requires-python:>=3.5)
  Saved /tmp/tmphkyfhldh/callspect-0.1.0-py3-none-any.whl
Skipping callspect, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-7pgk7pea/callspect