Created temporary directory: /tmp/pip-ephem-wheel-cache-bavp5vsv
Created temporary directory: /tmp/pip-req-tracker-pxn8qlju
Created requirements tracker '/tmp/pip-req-tracker-pxn8qlju'
Created temporary directory: /tmp/pip-wheel-tb8drnhh
Collecting py-trees==2.0.8
  1 location(s) to search for versions of py-trees:
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  Getting page https://pypi.org/simple/py-trees/
  Analyzing links from page https://pypi.org/simple/py-trees/
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    Found link https://files.pythonhosted.org/packages/b9/fb/f3eaad77e4326de680709dfee2844f8c47797d1a29cf4b42ad4dd82c30f5/py_trees-0.6.0.tar.gz#sha256=e8adf5b3bf5549e6995241442a7a643683aeebf47fcee723650ed9ca92d5de46 (from https://pypi.org/simple/py-trees/), version: 0.6.0
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    Found link https://files.pythonhosted.org/packages/e6/53/a109eb9163ce01ca4de398a33c7be8ac873d5691a5022e3e11f632e3db3a/py_trees-0.6.2.tar.gz#sha256=f2605882ce697fc6ad4ffa0fbd62aba2734ee78bbe9116e88149c95d3890b6d1 (from https://pypi.org/simple/py-trees/), version: 0.6.2
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    Found link https://files.pythonhosted.org/packages/52/37/d4152213dc498ae245bb223c552a81343ad2c3b49b323648829a08359124/py_trees-0.6.3.tar.gz#sha256=fc883768dd577c5f465f2c1e1a9cf301a19fd656de72caed9720956338fbede1 (from https://pypi.org/simple/py-trees/), version: 0.6.3
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    Found link https://files.pythonhosted.org/packages/71/c4/9f504b7e82759d6ec09d6cd1125408c47ac58fd8f707ca4787008f8dbff2/py_trees-0.6.4.tar.gz#sha256=a6e4364c8a39383ab8020ca4f68cb001be3bb9ee080decaa78bea79738d8d709 (from https://pypi.org/simple/py-trees/), version: 0.6.4
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    Found link https://files.pythonhosted.org/packages/2b/12/8a8a1b9605d954c0b778b84e25829589163b4463bf4c9aab9417bd02efe6/py_trees-0.6.5.tar.gz#sha256=2a67fa532576fa037bd51aa9b77ada29abf08c0da00a6b1d87bc526f9f3920c2 (from https://pypi.org/simple/py-trees/), version: 0.6.5
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    Found link https://files.pythonhosted.org/packages/06/78/40689675bc9b74e0d42e32b01d04ce91c6fd261765fea82550a7770993cc/py_trees-0.7.3.tar.gz#sha256=4d6c9aa7cdf1c726b2baadd571e1548f76f9d0499867bc13389af49e7148d181 (from https://pypi.org/simple/py-trees/), version: 0.7.3
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  Downloading https://files.pythonhosted.org/packages/e5/b1/60e25f08dd1c31a19ad0b5582357543ec2026caf381d7414dd8d7415de0c/py_trees-2.0.8-py3-none-any.whl (90kB)
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  Saved /tmp/tmp0whdxogd/py_trees-2.0.8-py3-none-any.whl
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Skipping py-trees, due to already being wheel.
Cleaning up...
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Removed build tracker '/tmp/pip-req-tracker-pxn8qlju'