Collecting attrs==17.4.0
  1 location(s) to search for versions of attrs:
  * https://pypi.python.org/simple/attrs/
  Getting page https://pypi.python.org/simple/attrs/
  Analyzing links from page https://pypi.python.org/simple/attrs/
    Found link https://pypi.python.org/packages/01/b0/3ac73bf6df716a38568a16f6a9cbc46cc9e8ed6fe30c8768260030db55d4/attrs-16.3.0.tar.gz#md5=4ec003c49360853cf935113d1ae56151 (from https://pypi.python.org/simple/attrs/), version: 16.3.0
    Skipping link https://pypi.python.org/packages/1a/61/f43428ad99e09a1c3d7c7f7e6325527283f9d5647dda42e686a522a22076/attrs-15.0.0a1-py2-none-any.whl#md5=2687ab67bb5713c46d027c90bf0f165c (from https://pypi.python.org/simple/attrs/); it is not compatible with this Python
    Found link https://pypi.python.org/packages/1f/32/aab2edd5cd015b0155214de10160d205e7d593be9670240358892c7cb253/attrs-15.0.0a1.tar.gz#md5=e180618d9d32607c38495d27bd81a0d1 (from https://pypi.python.org/simple/attrs/), version: 15.0.0a1
    Found link https://pypi.python.org/packages/1f/9e/797b1b3e1faef3d62560ec55b1bf16311eeb54baf7d7ea64a1d7508824e5/attrs-16.0.0-py2.py3-none-any.whl#md5=fd0df120e109cc59dd00f887bc642f54 (from https://pypi.python.org/simple/attrs/), version: 16.0.0
    Skipping link https://pypi.python.org/packages/2f/b8/f65204c643546fe6c2f16a305c5c4903a696a9ac3281708af747e080d97d/attrs-15.0.0-py2-none-any.whl#md5=7a4933b0a76c7d68a8f04a73c94cbe0b (from https://pypi.python.org/simple/attrs/); it is not compatible with this Python
    Found link https://pypi.python.org/packages/33/51/c53224aeff5af098204ee15281c662e1d4ac4635a15552bfdb17b97674e4/attrs-17.1.0.tar.gz#md5=928ca9077241cff337ffb5a6821b0278 (from https://pypi.python.org/simple/attrs/), version: 17.1.0
    Found link https://pypi.python.org/packages/3f/a4/d0db68156abbdee228ce69a786ecb512da40b36b1289aadb9e3f9fd45121/attrs-17.3.0.tar.gz#md5=4314f784ca3174d91956da9828248960 (from https://pypi.python.org/simple/attrs/), version: 17.3.0
    Found link https://pypi.python.org/packages/41/c5/b7ab0d97bb20cec1ca4bb1f0a418c5f50022b6624e6417e997b2e1c034d5/attrs-16.2.0-py2.py3-none-any.whl#md5=3b923385af5d43da9327d4326dbece83 (from https://pypi.python.org/simple/attrs/), version: 16.2.0
    Found link https://pypi.python.org/packages/43/c6/18446759c9b0f89a149854974e9ac8050f14cebea31dbff7344dd7bd35ef/attrs-17.3.0-py2.py3-none-any.whl#md5=726f29636ec7b1e199c5752223d10cb0 (from https://pypi.python.org/simple/attrs/), version: 17.3.0
    Found link https://pypi.python.org/packages/6b/71/1682316894ed80b362b9102e7a10997136d8dc1213c36a9f0515c451373a/attrs-16.2.0.tar.gz#md5=442b73d049af046ced010671b7bfd0e9 (from https://pypi.python.org/simple/attrs/), version: 16.2.0
    Found link https://pypi.python.org/packages/89/15/80d388d696c8c8ba14874635207aa698eb30ef1242dbb54d9eccf0e927ff/attrs-16.0.0.tar.gz#md5=5bcdd418f6e83e580434c63067c08a73 (from https://pypi.python.org/simple/attrs/), version: 16.0.0
    Found link https://pypi.python.org/packages/8b/0b/a06cfcb69d0cb004fde8bc6f0fd192d96d565d1b8aa2829f0f20adb796e5/attrs-17.4.0.tar.gz#md5=d7a89063b2e0fd36bd82389c4d82821d (from https://pypi.python.org/simple/attrs/), version: 17.4.0
    Found link https://pypi.python.org/packages/8b/76/c57eefda827b981135ccacd4328fceaa3693f79d9da1e5d78fbe59ebd0c4/attrs-15.2.0.tar.gz#md5=b3c460eb6482f6e557c0e4025475c007 (from https://pypi.python.org/simple/attrs/), version: 15.2.0
    Found link https://pypi.python.org/packages/a2/f6/97806e9f6fe4d2b6f04d947a9a4ac36b17d1f4bc48cbebfcd27d5c198d33/attrs-15.0.0.tar.gz#md5=b45f34b1a49e667880f2c5efcfc533b2 (from https://pypi.python.org/simple/attrs/), version: 15.0.0
    Found link https://pypi.python.org/packages/b2/63/c969a9e1acca5922edf35f48552cdd40ec29f5bbb26fab6a3190b155a96e/attrs-16.1.0.tar.gz#md5=5bc532dde76f34ade746debabdfe1662 (from https://pypi.python.org/simple/attrs/), version: 16.1.0
    Found link https://pypi.python.org/packages/b4/ac/9685a9e9e0857b7229a47573fd7ec6a1b930b07d05cb93d25ad109e55013/attrs-15.2.0-py2.py3-none-any.whl#md5=9c0855df4ea158b74574deeb379283f2 (from https://pypi.python.org/simple/attrs/), version: 15.2.0
    Found link https://pypi.python.org/packages/b5/60/4e178c1e790fd60f1229a9b3cb2f8bc2f4cc6ff2c8838054c142c70b5adc/attrs-17.4.0-py2.py3-none-any.whl#md5=5835a573b3f0316e1602dac3fd9c1daf (from https://pypi.python.org/simple/attrs/), version: 17.4.0
    Found link https://pypi.python.org/packages/bb/6c/730710c765ab6d4493f460196ab003671d27b38568412a780fc67532b47c/attrs-16.3.0-py2.py3-none-any.whl#md5=0d188abbbde8c83253cb11e8df890d30 (from https://pypi.python.org/simple/attrs/), version: 16.3.0
    Found link https://pypi.python.org/packages/be/41/e909cb6d901e9689da947419505cc7fb7d242a08a62ee221fce6a009a523/attrs-17.2.0.tar.gz#md5=3b7136a570f3ff8a4ff42e7360073f9f (from https://pypi.python.org/simple/attrs/), version: 17.2.0
    Found link https://pypi.python.org/packages/cd/ff/2d0c4483443789477022d85ab467bc4c0f18c6d45cb02234ed64048cbb33/attrs-17.2.0-py2.py3-none-any.whl#md5=24d211e9b6dbb0cdcce15dea97d93019 (from https://pypi.python.org/simple/attrs/), version: 17.2.0
    Found link https://pypi.python.org/packages/d6/6f/ed3c4f786f828a01306c36128fa606ef8b56495d691cd42f2d4478f8a676/attrs-17.1.0-py2.py3-none-any.whl#md5=20e72100f5743de7e27615b2781f36f5 (from https://pypi.python.org/simple/attrs/), version: 17.1.0
    Found link https://pypi.python.org/packages/d7/ab/a723ff08187ad381952d2ee7b00afbb577367919b6188a4fd5050e0e47d8/attrs-15.1.0-py2.py3-none-any.whl#md5=c403734ae572c96b7066b32d7687bd8d (from https://pypi.python.org/simple/attrs/), version: 15.1.0
    Found link https://pypi.python.org/packages/fd/23/ec3d4db4d2b902d47a856db4e7e8461fb9bc6561dcb1cd007670afdce332/attrs-16.1.0-py2.py3-none-any.whl#md5=432d031bfa523a4f7935029bf4bce02b (from https://pypi.python.org/simple/attrs/), version: 16.1.0
    Found link https://pypi.python.org/packages/fe/f6/3dc91aadb0a6c29e80943ce8345664220762f0db34c047dd3722fd40a9b0/attrs-15.1.0.tar.gz#md5=9c6322db32b56ab2f755a7e544083f4a (from https://pypi.python.org/simple/attrs/), version: 15.1.0
  Using version 17.4.0 (newest of versions: 17.4.0)
  Downloading attrs-17.4.0-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/b5/60/4e178c1e790fd60f1229a9b3cb2f8bc2f4cc6ff2c8838054c142c70b5adc/attrs-17.4.0-py2.py3-none-any.whl#md5=5835a573b3f0316e1602dac3fd9c1daf (from https://pypi.python.org/simple/attrs/)
  Saved /tmp/tmpqmbnrae9/attrs-17.4.0-py2.py3-none-any.whl
Skipping attrs, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-b_x2pekc/attrs