Created temporary directory: /tmp/pip-ephem-wheel-cache-r9ctxxxc
Created temporary directory: /tmp/pip-req-tracker-937qt8e4
Created requirements tracker '/tmp/pip-req-tracker-937qt8e4'
Created temporary directory: /tmp/pip-wheel-fxkaqf4y
Collecting shell-cache==2019.3.21
  1 location(s) to search for versions of shell-cache:
  * https://pypi.org/simple/shell-cache/
  Getting page https://pypi.org/simple/shell-cache/
  Analyzing links from page https://pypi.org/simple/shell-cache/
    Found link https://files.pythonhosted.org/packages/ad/10/63a6ffcba1483d28d6e91194dff7346f119540ce1758aa444402068e7615/shell-cache-2019.3.21.tar.gz#sha256=8da37bf8c36f9afe5e379eaf707a63a59fae5e7b784cea9f00c9873e103dc419 (from https://pypi.org/simple/shell-cache/), version: 2019.3.21
    Found link https://files.pythonhosted.org/packages/0f/14/e3098cc9b3bc054c04303e868aa0c8c00b997efd78e2b023d68ce4d9a3b5/shell_cache-2019.3.21-py2.py3-none-any.whl#sha256=df97c11b361de0e7bb4b4799e5650b76fe65a4f00b66f08cd79719873fc8f733 (from https://pypi.org/simple/shell-cache/), version: 2019.3.21
    Found link https://files.pythonhosted.org/packages/41/53/673ec230adcdc31fd703a0b513188c1ca08b71bec00fe666a1bf56220410/shell-cache-2019.3.23.tar.gz#sha256=8ed16bd4dc4a5a5c31c75b61999a026cadaf9b1c6f7a5ad7a4dd533b5350a92d (from https://pypi.org/simple/shell-cache/), version: 2019.3.23
    Found link https://files.pythonhosted.org/packages/78/82/e328c214409cbacef4bb5dd5122220b1880a8ad9d0171320fc873d680ae5/shell_cache-2019.3.23-py2.py3-none-any.whl#sha256=e30f4c36bfea0ad25273a1734dc91c3dd318e7b5045041ade64a52c4e418523a (from https://pypi.org/simple/shell-cache/), version: 2019.3.23
    Found link https://files.pythonhosted.org/packages/e8/d7/6ee5f68322af848e210bb1aea2c1569a60461164ec1f8bc6341337523fe4/shell-cache-2019.4.13.tar.gz#sha256=6c0bb8650947968bf04e731a2db48745abfc3ad7c520af93eab36b1dac8f59b4 (from https://pypi.org/simple/shell-cache/), version: 2019.4.13
  Using version 2019.3.21 (newest of versions: 2019.3.21)
  Created temporary directory: /tmp/pip-unpack-xw024gw1
  Downloading https://files.pythonhosted.org/packages/0f/14/e3098cc9b3bc054c04303e868aa0c8c00b997efd78e2b023d68ce4d9a3b5/shell_cache-2019.3.21-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/0f/14/e3098cc9b3bc054c04303e868aa0c8c00b997efd78e2b023d68ce4d9a3b5/shell_cache-2019.3.21-py2.py3-none-any.whl#sha256=df97c11b361de0e7bb4b4799e5650b76fe65a4f00b66f08cd79719873fc8f733 (from https://pypi.org/simple/shell-cache/)
  Saved /tmp/tmpi8zudtjy/shell_cache-2019.3.21-py2.py3-none-any.whl
  Added shell-cache==2019.3.21 from https://files.pythonhosted.org/packages/0f/14/e3098cc9b3bc054c04303e868aa0c8c00b997efd78e2b023d68ce4d9a3b5/shell_cache-2019.3.21-py2.py3-none-any.whl#sha256=df97c11b361de0e7bb4b4799e5650b76fe65a4f00b66f08cd79719873fc8f733 to build tracker '/tmp/pip-req-tracker-937qt8e4'
  Removed shell-cache==2019.3.21 from https://files.pythonhosted.org/packages/0f/14/e3098cc9b3bc054c04303e868aa0c8c00b997efd78e2b023d68ce4d9a3b5/shell_cache-2019.3.21-py2.py3-none-any.whl#sha256=df97c11b361de0e7bb4b4799e5650b76fe65a4f00b66f08cd79719873fc8f733 from build tracker '/tmp/pip-req-tracker-937qt8e4'
Skipping shell-cache, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-fxkaqf4y/shell-cache
Removed build tracker '/tmp/pip-req-tracker-937qt8e4'