Created temporary directory: /tmp/pip-ephem-wheel-cache-1m9ct6oj
Created temporary directory: /tmp/pip-req-tracker-pqrj5h3n
Created requirements tracker '/tmp/pip-req-tracker-pqrj5h3n'
Created temporary directory: /tmp/pip-wheel-nkcsi5hl
Looking in indexes: https://pypi.python.org/simple
Collecting backports.shutil_which==3.5.2
  1 location(s) to search for versions of backports.shutil-which:
  * https://pypi.python.org/simple/backports-shutil-which/
  Getting page https://pypi.python.org/simple/backports-shutil-which/
  Analyzing links from page https://pypi.org/simple/backports-shutil-which/
    Found link https://files.pythonhosted.org/packages/a2/c4/fb76dfc7831416ec0832420abbd72d8fac262a44df2759deeaf75c8c0d70/backports.shutil_which-3.5.1-py2.py3-none-any.whl#sha256=ce71e4040360e239d142e73d28d592f1951cdff4330db6616efcb43d1abe6ad4 (from https://pypi.org/simple/backports-shutil-which/), version: 3.5.1
    Found link https://files.pythonhosted.org/packages/dd/ea/715dc80584207a0ff4a693a73b03c65f087d8ad30842832b9866fe18cb2f/backports.shutil_which-3.5.1.tar.gz#sha256=dd439a7b02433e47968c25a45a76704201c4ef2167deb49830281c379b1a4a9b (from https://pypi.org/simple/backports-shutil-which/), version: 3.5.1
    Found link https://files.pythonhosted.org/packages/3d/1b/136e8ffa98ce077e12afde6c333eb2b61266e0de0e404ec7a0c47b8f8a8b/backports.shutil_which-3.5.2-py2.py3-none-any.whl#sha256=dc627fb2bc40f8ad7e012d7d9a59ed0cb1b74a9510ed936b3f9358b7ac6d4d31 (from https://pypi.org/simple/backports-shutil-which/), version: 3.5.2
    Found link https://files.pythonhosted.org/packages/a0/22/51b896a4539f1bff6a7ab8514eb031b9f43f12bff23f75a4c3f4e9a666e5/backports.shutil_which-3.5.2.tar.gz#sha256=fe39f567cbe4fad89e8ac4dbeb23f87ef80f7fe8e829669d0221ecdb0437c133 (from https://pypi.org/simple/backports-shutil-which/), version: 3.5.2
  Using version 3.5.2 (newest of versions: 3.5.2)
  Created temporary directory: /tmp/pip-unpack-044pv426
  Downloading https://files.pythonhosted.org/packages/3d/1b/136e8ffa98ce077e12afde6c333eb2b61266e0de0e404ec7a0c47b8f8a8b/backports.shutil_which-3.5.2-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/3d/1b/136e8ffa98ce077e12afde6c333eb2b61266e0de0e404ec7a0c47b8f8a8b/backports.shutil_which-3.5.2-py2.py3-none-any.whl#sha256=dc627fb2bc40f8ad7e012d7d9a59ed0cb1b74a9510ed936b3f9358b7ac6d4d31 (from https://pypi.org/simple/backports-shutil-which/)
  Saved /tmp/tmp2osd773h/backports.shutil_which-3.5.2-py2.py3-none-any.whl
  Added backports.shutil_which==3.5.2 from https://files.pythonhosted.org/packages/3d/1b/136e8ffa98ce077e12afde6c333eb2b61266e0de0e404ec7a0c47b8f8a8b/backports.shutil_which-3.5.2-py2.py3-none-any.whl#sha256=dc627fb2bc40f8ad7e012d7d9a59ed0cb1b74a9510ed936b3f9358b7ac6d4d31 to build tracker '/tmp/pip-req-tracker-pqrj5h3n'
  Removed backports.shutil_which==3.5.2 from https://files.pythonhosted.org/packages/3d/1b/136e8ffa98ce077e12afde6c333eb2b61266e0de0e404ec7a0c47b8f8a8b/backports.shutil_which-3.5.2-py2.py3-none-any.whl#sha256=dc627fb2bc40f8ad7e012d7d9a59ed0cb1b74a9510ed936b3f9358b7ac6d4d31 from build tracker '/tmp/pip-req-tracker-pqrj5h3n'
Skipping backports.shutil-which, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-nkcsi5hl/backports.shutil-which
Removed build tracker '/tmp/pip-req-tracker-pqrj5h3n'