I have two Bionic x86_64 systems. One was showing the problem, the other was
not.
The problem disappeared after issuing:
# apt purge python-backports.functools-lru-cache
# apt install python-matplotlib
The first command also uninstalled python-matplotlib.
The second command re-installed python-b
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: matplotlib (Ubuntu)
Status: New => Confirmed
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Title:
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: backports.functools-lru-cache (Ubuntu)
Status: New => Confirmed
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That should have been created on install, by the namespace mechanism of
dh_python2
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https://bugs.launchpad.net/bugs/1764823
Title:
[bionic] python-matplotlib import fails
To manage not
** Also affects: backports.functools-lru-cache (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1764823
Title:
[bionic] python-matplotlib import fai
Found it: Package **python-backports.functools-lru-cache** does not contain the
necessary file
/usr/lib/python2.7/dist-packages/backports/__init__.py
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https://bugs.launchpad.net/bugs/1764
