Created temporary directory: /tmp/pip-ephem-wheel-cache-rjxmowug
Created temporary directory: /tmp/pip-req-tracker-6c23j5ji
Created requirements tracker '/tmp/pip-req-tracker-6c23j5ji'
Created temporary directory: /tmp/pip-wheel-9bawpin_
Collecting collapsing-thread-pool-executor==2018.2
  1 location(s) to search for versions of collapsing-thread-pool-executor:
  * https://pypi.org/simple/collapsing-thread-pool-executor/
  Getting page https://pypi.org/simple/collapsing-thread-pool-executor/
  Analyzing links from page https://pypi.org/simple/collapsing-thread-pool-executor/
    Found link https://files.pythonhosted.org/packages/2e/73/fab3b6e06529ffb3633f719c4d4851b6592e21a60b801f5fc798dcfee4f3/collapsing-thread-pool-executor-2018.1.tar.gz#sha256=34f99ba97c6b71ce196289b841871d9c6e3efd428f05136baa42ccb79a6e2040 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.1
    Found link https://files.pythonhosted.org/packages/f9/d4/4e4f9ffb8008c2be3ae425b90167ab25c988f4082886a60e9d5e9b650c65/collapsing_thread_pool_executor-2018.1-py3-none-any.whl#sha256=243c9e20364dd3655787a1ee3c62ebb7863c37e0274dd8bdafa964e9f87f8d25 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.1
    Found link https://files.pythonhosted.org/packages/3c/21/c22af8577713f3b7477b63552002db33c655f54b7821adf0a093bd90f4df/collapsing-thread-pool-executor-2018.2.tar.gz#sha256=43716998d40c56fde45b725924d491f26fa27359b2567a88a28883ffb687ca1f (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.2
    Found link https://files.pythonhosted.org/packages/1a/6d/f22a6fadee10a8cdd2ebdd77f2750b6f028c3be4a0b2b8462beac8f88362/collapsing_thread_pool_executor-2018.2-py3-none-any.whl#sha256=bbb6546438982e385071481494750448bd7b8dbadd47d3013cd781c17133c175 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.2
    Found link https://files.pythonhosted.org/packages/84/eb/2944e2d902d6dbd1a9216e51c9d41241ce74842fbf5053e1f403386e1fe4/collapsing-thread-pool-executor-2018.3.tar.gz#sha256=d0e1adce9116eab1229844cb459bc6a421649290dda31fdfb67bae899eda0f5a (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.3
    Found link https://files.pythonhosted.org/packages/47/64/fdaeff0dd805ba753d4f10345bf8a2c889b9971a1a200ec8b5cc69d67f6b/collapsing_thread_pool_executor-2018.3-py3-none-any.whl#sha256=57b6ea9e179552c7fc618718631fe8f43441d7b929abbe44422348b1dec23ee1 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.3
    Found link https://files.pythonhosted.org/packages/4e/45/eb0b0a9c3db7c23e4945fd4eedc0aa45d9df7c23cbd05d8b240786e84de2/collapsing-thread-pool-executor-2018.4.tar.gz#sha256=a266659e273b734b2f2c12f36effe6942841f1b70b25996d9e83c9e752a230ad (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.4
    Found link https://files.pythonhosted.org/packages/f2/e2/886fe27ad887b1105e5d7024bf56528447a2a43efe42c0ad0994e2c92e04/collapsing_thread_pool_executor-2018.4-py3-none-any.whl#sha256=8edd559c5f3c433f593b5f179fce1a39da25273fbd04f1100a43ce6afe168381 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.4
    Found link https://files.pythonhosted.org/packages/7f/e5/2b996074c8e3eab865f0bac3d8e9ad2088a3ec5650535783a001bce511ce/collapsing-thread-pool-executor-2018.5.tar.gz#sha256=e53440298dda071e116319666145917212a28ad9bb305ee38925dd3baf1e3aed (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.5
    Found link https://files.pythonhosted.org/packages/d3/98/c1456d60494b236456ed5bb9df42441ee4804c732e5e9f0e28ecc81c1841/collapsing_thread_pool_executor-2018.5-py3-none-any.whl#sha256=dc4b8b1ab6b6416d4666156f60cd680534572e09c6958825b99543e96691bd42 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.5
    Found link https://files.pythonhosted.org/packages/53/2c/617bd9e1b670b873ca0a1a88c636fdeae322f67981cbffa08ade20540e07/collapsing-thread-pool-executor-2018.6.tar.gz#sha256=1abcfe023e5ba5a5a46f2f6e693d24d5fc34a49271480e18f37338e72ee97f73 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.6
    Found link https://files.pythonhosted.org/packages/aa/2d/b25036fac734f699279105d7c6445baaf3b0f501f84c08afbc5931868941/collapsing_thread_pool_executor-2018.6-py3-none-any.whl#sha256=ddc996e762e6600443c0ba847a8a0d70791fdc647f0cb25fe0ecb8c7420da1f6 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2018.6
    Found link https://files.pythonhosted.org/packages/1c/2a/93f3b44ceb5408e0fed1b476973266a51cdab6ad54ebc113403b50f74531/collapsing-thread-pool-executor-2019.10.tar.gz#sha256=02a3087372067f3fa6dd26b49239ed45f088fd57edfb1e4abb8d35385d12451e (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2019.10
    Skipping link https://files.pythonhosted.org/packages/db/e5/ab3f932bb631e50fe4f4688d79fd217b9db6eb107092bb747e6059977791/collapsing_thread_pool_executor-2019.10-py2-none-any.whl#sha256=c0452b7491bea45d91dcc5534742148479931b9bd3695fae29b0eb9228ffe6e9 (from https://pypi.org/simple/collapsing-thread-pool-executor/); it is not compatible with this Python
    Found link https://files.pythonhosted.org/packages/c2/fb/feaf237a778b9d2388f0bc765eaa63b9f9d9fcf23ecb01f482cd7fa47e5a/collapsing-thread-pool-executor-2019.11.tar.gz#sha256=e41ee61945211faa7a1f736083ff8c0f3e305fa1b11c28ab5b1f973426369152 (from https://pypi.org/simple/collapsing-thread-pool-executor/), version: 2019.11
  Using version 2018.2 (newest of versions: 2018.2)
  Created temporary directory: /tmp/pip-unpack-w9j89dv6
  Downloading https://files.pythonhosted.org/packages/1a/6d/f22a6fadee10a8cdd2ebdd77f2750b6f028c3be4a0b2b8462beac8f88362/collapsing_thread_pool_executor-2018.2-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/1a/6d/f22a6fadee10a8cdd2ebdd77f2750b6f028c3be4a0b2b8462beac8f88362/collapsing_thread_pool_executor-2018.2-py3-none-any.whl#sha256=bbb6546438982e385071481494750448bd7b8dbadd47d3013cd781c17133c175 (from https://pypi.org/simple/collapsing-thread-pool-executor/)
  Saved /tmp/tmpji7953p5/collapsing_thread_pool_executor-2018.2-py3-none-any.whl
  Added collapsing-thread-pool-executor==2018.2 from https://files.pythonhosted.org/packages/1a/6d/f22a6fadee10a8cdd2ebdd77f2750b6f028c3be4a0b2b8462beac8f88362/collapsing_thread_pool_executor-2018.2-py3-none-any.whl#sha256=bbb6546438982e385071481494750448bd7b8dbadd47d3013cd781c17133c175 to build tracker '/tmp/pip-req-tracker-6c23j5ji'
  Removed collapsing-thread-pool-executor==2018.2 from https://files.pythonhosted.org/packages/1a/6d/f22a6fadee10a8cdd2ebdd77f2750b6f028c3be4a0b2b8462beac8f88362/collapsing_thread_pool_executor-2018.2-py3-none-any.whl#sha256=bbb6546438982e385071481494750448bd7b8dbadd47d3013cd781c17133c175 from build tracker '/tmp/pip-req-tracker-6c23j5ji'
Skipping collapsing-thread-pool-executor, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-9bawpin_/collapsing-thread-pool-executor
Removed build tracker '/tmp/pip-req-tracker-6c23j5ji'