Copyright for pytools source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: pytools
Upstream-Contact: Andreas Klöckner 
Source: https://git.tiker.net/pytools.git
 https://pypi.org/project/pytools/
 https://github.com/inducer/pytools

Files: *
Copyright: 2009-2016 Andreas Klöckner 
License: Expat

Files: pytools/__init__.py
Copyright: 2009-2016 Andreas Klöckner 
           2008 Michele Simionato
License: Expat

Files: pytools/persistent_dict.py
Copyright: 2011, 2014 Andreas Klöckner 
           2017 Matt Wala
License: Expat

Files: pytools/importlib_backport.py
Copyright: Python Software Foundation
License: PSF
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License: Expat
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
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 Software is furnished to do so, subject to the following
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 included in all copies or substantial portions of the Software.
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 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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