matplotlib 2.1.0 "stable" · Issue #9578 · matplotlib/matplotlib · GitHub

2.1.0 raises the following import error:

import matplotlib

File "/home/enoch/.local/lib/python2.7/site-packages/matplotlib/init.py", line 128, in
from matplotlib.rcsetup import defaultParams, validate_backend, cycler
File "/home/enoch/.local/lib/python2.7/site-packages/matplotlib/rcsetup.py", line 29, in
from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
File "/home/enoch/.local/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py", line 32, in
from backports.functools_lru_cache import lru_cache
ImportError: No module named functools_lru_cache

Previous stable version 2.0.2 does not.
Please be guided accordingly. Thanks, Enoch.

How did you install Matplotlib? It appears to have not correctly picked up a required dependency.

How did you install/upgrade matplotlib? We have been seeing reports like this that come from incorrect packaging from downstream providers.

…

On Wed, Oct 25, 2017 at 2:31 PM, Enoch ***@***.***> wrote: 2.1.0 raises the following import error: import matplotlib File "/home/enoch/.local/lib/python2.7/site-packages/matplotlib/*init*.py", line 128, in from matplotlib.rcsetup import defaultParams, validate_backend, cycler File "/home/enoch/.local/lib/python2.7/site-packages/matplotlib/rcsetup.py", line 29, in from matplotlib.fontconfig_pattern import parse_fontconfig_pattern File "/home/enoch/.local/lib/python2.7/site-packages/ matplotlib/fontconfig_pattern.py", line 32, in from backports.functools_lru_cache import lru_cache ImportError: No module named functools_lru_cache Previous stable version 2.0.2 does not. Please be guided accordingly. Thanks, Enoch. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#9578>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AARy-K5H-kXOig140K17CYU15-R8PqTNks5sv36MgaJpZM4QGdMm> .

pip install --upgrade --user matplotlib

uname -a
Linux dome 4.13.0-16-generic #19-Ubuntu SMP Wed Oct 11 18:35:14 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Can you uninstall matplotlib (pip uninstall matplotlib) and post the log of

$ pip install -v --upgrade --user matplotlib # -v: verbose.

(possibly to a gist, it's quite long)? thanks.

matplotlib.log

So the log says

Requirement already up-to-date: backports.functools-lru-cache in /home/enoch/.local/lib/python2.7/site-packages (from matplotlib)

Do you indeed have /home/enoch/.local/lib/python2.7/site-packages/backports/functools_lru_cache?
Can you directly import it?
You may have a broken install of backports.functools_lru_cache in which case you should just uninstall and reinstall it. (xref pypa/pip#3869 :-/)

No such file or directory

uninstalling, then installing backports.functools_lru_cache is not helping
This package is probably broken:

pip install --upgrade --user backports.functools_lru_cache
Collecting backports.functools_lru_cache
Using cached backports.functools_lru_cache-1.4-py2.py3-none-any.whl
Installing collected packages: backports.functools-lru-cache
Successfully installed backports.functools-lru-cache-1.4

pip install --no-cache-dir ... backports.functools... ?
Perhaps your cache is also messed up :/

didn't help.
I note that matplotlib==2.0.2, which works well, does not depend on backports.functools-lru-cache-1.4

Mine is in /Users/jklymak/anaconda3/envs/py27/lib/python2.7/site-packages/backports.functools_lru_cache-1.4-py2.7.egg-info So maybe look in your /home/enoch/.local/lib/python2.7/site-packages for any files relevant to backports?

The package on pypi installs OK for me. Here is some history showing a conda environment starting without it, then the installation, and then the verification that it imports OK.

In [1]: from backports.functools_lru_cache import lru_cache
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-ac5dd3d77a19> in <module>()
----> 1 from backports.functools_lru_cache import lru_cache

ImportError: No module named functools_lru_cache

In [2]: exit
(python2) efiring@manini2:~$ pip install backports.functools_lru_cache
Collecting backports.functools_lru_cache
  Downloading backports.functools_lru_cache-1.4-py2.py3-none-any.whl
Installing collected packages: backports.functools-lru-cache
Successfully installed backports.functools-lru-cache-1.4
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
(python2) efiring@manini2:~$ ipython
Python 2.7.12 |Continuum Analytics, Inc.| (default, Jul  2 2016, 17:43:17)
Type "copyright", "credits" or "license" for more information.

IPython 5.0.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: from backports.functools_lru_cache import lru_cache

In [2]:

It appears that there is something odd about your python installation--maybe some leftover bits from earlier package installations, or something in PYTHONPATH, or multiple installations. In any case, this is not a matplotlib bug, so I am closing this issue.

If I follow your sequence I get the same results, so it must be something peculiar to my order of module imports. matplotlib is imported quite late. I'll have to step through and compare...
Thanks.

Uninstall first pip uninstall backports.functools_lru_cache
and then re-install it pip install backports.functools_lru_cache

https://stackoverflow.com/a/47317710/4521646

matplotlib 2.1.0 "stable" · Issue #9578 · matplotlib/matplotlib · GitHub

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matplotlib 2.1.0 "stable" #9578

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matplotlib 2.1.0 "stable" · Issue #9578 · matplotlib/matplotlib · GitHub

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matplotlib 2.1.0 "stable" #9578

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tacaswell commented on Oct 25, 2017

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