Collecting python-interface==1.4.0
  1 location(s) to search for versions of python-interface:
  * https://pypi.python.org/simple/python-interface/
  Getting page https://pypi.python.org/simple/python-interface/
  Analyzing links from page https://pypi.python.org/simple/python-interface/
    Found link https://pypi.python.org/packages/13/f8/1b4ad1a70ef1001d6dba5ca7cfd227ef6ee4c86df8d90f70a7fbfd2c1e6e/python-interface-1.2.0.tar.gz#md5=81157c3e87eba55e5dd5e467d4c218a6 (from https://pypi.python.org/simple/python-interface/), version: 1.2.0
    Found link https://pypi.python.org/packages/3d/d5/d0f45a4d8b524281b3bf9094f2c4eeb57093aad4fbae45a4fcc2ffac0953/python-interface-1.0.0.tar.gz#md5=2b7964187a2bcf74eec6b38cfdde1dc8 (from https://pypi.python.org/simple/python-interface/), version: 1.0.0
    Found link https://pypi.python.org/packages/97/c4/1f3a0a4b6b360189ddda9dc3a9d264064c6b952a783322502048af8b3c12/python_interface-1.4.0-py3-none-any.whl#md5=8bbff13cc58f02ab4338eb84559e1a08 (from https://pypi.python.org/simple/python-interface/), version: 1.4.0
    Found link https://pypi.python.org/packages/9a/bc/10e76b74a416821712a67eb0c0d27489b417c01280a02aaae5901fc1412c/python-interface-1.4.0.tar.gz#md5=d75cfa2c8438999181618811fe29be18 (from https://pypi.python.org/simple/python-interface/), version: 1.4.0
    Found link https://pypi.python.org/packages/af/21/4f408d1e033e6c17b05b844f1bfc77b293cb447dc2953277302d5eba6088/python-interface-1.3.0.tar.gz#md5=d6326e4b0c8c400977651b6782557a47 (from https://pypi.python.org/simple/python-interface/), version: 1.3.0
    Found link https://pypi.python.org/packages/df/4b/a9486f700cf41f01b2baf72be8cc8ef4b5ba4ab0e835e8d98ca8d1730ad7/python-interface-1.1.0.tar.gz#md5=ba91c727c201b8b7881287e4b938278a (from https://pypi.python.org/simple/python-interface/), version: 1.1.0
  Using version 1.4.0 (newest of versions: 1.4.0)
  Downloading python_interface-1.4.0-py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/97/c4/1f3a0a4b6b360189ddda9dc3a9d264064c6b952a783322502048af8b3c12/python_interface-1.4.0-py3-none-any.whl#md5=8bbff13cc58f02ab4338eb84559e1a08 (from https://pypi.python.org/simple/python-interface/)
  Saved /tmp/tmppsyj5ayr/python_interface-1.4.0-py3-none-any.whl
Skipping python-interface, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-5sgqqsad/python-interface