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ImportError: No module named functools_lru_cache #9344
Description
Bug report
Bug summary
upgraded matplotlib using MacPorts and found out that matplotlib now can't be imported
tried uninstall and reinstall matplotlib using MacPorts but the problem still exists
Code for reproduction
import matplotlibActual outcome
Traceback (most recent call last):
File "/Users/Albert_Guo/Desktop/test_code.py", line 1, in <module>
import matplotlib
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/__init__.py", line 128, in <module>
from matplotlib.rcsetup import defaultParams, validate_backend, cycler
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/rcsetup.py", line 29, in <module>
from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py", line 32, in <module>
from backports.functools_lru_cache import lru_cache
ImportError: No module named functools_lru_cache
Expected outcome
Matplotlib version
- Operating system: macOS Sierra Version: 10.12.6
- Matplotlib version: py27-matplotlib @2.1.0_1 (installed by MacPorts)
- Matplotlib backend (print(matplotlib.get_backend())): can't print anything because matplotlib can't be imported at the first place
- Python version: python27 @2.7.14 (installed by MacPorts)
- Jupyter version (if applicable): py27-jupyter @1.0.0_1 (installed by MacPorts)
- Other libraries: py27-backports @1.0_0 (installed by MacPorts)
Activity
WeatherGod commented on Oct 10, 2017
Albert-Z-Guo commented on Oct 10, 2017
backports? Yes, I do have it. But the problem still exists.
WeatherGod commented on Oct 10, 2017
Albert-Z-Guo commented on Oct 10, 2017
I solved this problem. Thanks for the quick help @WeatherGod!
I need to manually install another package named "py27-backports-functools_lru_cache" through MacPorts.
I guess I shall move to Python 3 now. Python 2.7 seems to have more and more legacy compatibility problems these days.
WeatherGod commented on Oct 10, 2017
paulbrodersen commented on Nov 23, 2017
Can we re-open this issue, please? The problem re-surfaces (at least for me) when I pip install matplotlib 2.1.0 in a clean virtualenv. Regression to matplotlib 2.0.2 solves the problem. Ubuntu 17.04, virtualenv with python 2.7.13.
tacaswell commented on Nov 23, 2017
@paulbrodersen What version of pip are you using? Starting from an empty venv works correctly for me:
12:23 $ virtualenv2 /tmp/lpy New python executable in /tmp/lpy/bin/python2 Also creating executable in /tmp/lpy/bin/python Installing setuptools, pip, wheel...done. ✔ ~ 12:25 $ source /tmp/lpy/bin/activate (lpy) ✔ ~ 12:25 $ pip install matplotlib Collecting matplotlib Downloading matplotlib-2.1.0-cp27-cp27mu-manylinux1_x86_64.whl (14.9MB) 100% |████████████████████████████████| 14.9MB 73kB/s Collecting python-dateutil>=2.0 (from matplotlib) Using cached python_dateutil-2.6.1-py2.py3-none-any.whl Collecting cycler>=0.10 (from matplotlib) Using cached cycler-0.10.0-py2.py3-none-any.whl Collecting subprocess32 (from matplotlib) Collecting pytz (from matplotlib) Downloading pytz-2017.3-py2.py3-none-any.whl (511kB) 100% |████████████████████████████████| 512kB 1.7MB/s Collecting six>=1.10 (from matplotlib) Downloading six-1.11.0-py2.py3-none-any.whl Collecting backports.functools-lru-cache (from matplotlib) Using cached backports.functools_lru_cache-1.4-py2.py3-none-any.whl Collecting numpy>=1.7.1 (from matplotlib) Downloading numpy-1.13.3-cp27-cp27mu-manylinux1_x86_64.whl (16.6MB) 100% |████████████████████████████████| 16.7MB 66kB/s Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib) Using cached pyparsing-2.2.0-py2.py3-none-any.whl Installing collected packages: six, python-dateutil, cycler, subprocess32, pytz, backports.functools-lru-cache, numpy, pyparsing, matplotlib Successfully installed backports.functools-lru-cache-1.4 cycler-0.10.0 matplotlib-2.1.0 numpy-1.13.3 pyparsing-2.2.0 python-dateutil-2.6.1 pytz-2017.3 six-1.11.0 subprocess32-3.2.7 (lpy) ✔ ~ 12:25 $ python Python 2.7.14 (default, Sep 20 2017, 01:25:59) [GCC 7.2.0] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import matplotlib >>> import matplotlib.pyplot as plt >>>Can you post your install log?
paulbrodersen commented on Nov 24, 2017
This is getting more and more mysterious: backports.functools-lru-cache is clearly being downloaded and installed, but somehow it ends up not being on the path?!
Setting up fresh virtualenv, installing matplotlib, ignoring cache:
paul@paul-XPS-15-9560:~⟫ mkvirtualenv test_matplotlib_install Running virtualenv with interpreter /usr/bin/python2 New python executable in /home/paul/.virtualenvs/test_matplotlib_install/bin/python2 Also creating executable in /home/paul/.virtualenvs/test_matplotlib_install/bin/python Installing setuptools, pkg_resources, pip, wheel...done. (test_matplotlib_install) paul@paul-XPS-15-9560:~⟫ pip install --no-cache-dir matplotlib Collecting matplotlib Downloading matplotlib-2.1.0-cp27-cp27mu-manylinux1_x86_64.whl (14.9MB) 100% |████████████████████████████████| 14.9MB 9.3MB/s Collecting backports.functools-lru-cache (from matplotlib) Downloading backports.functools_lru_cache-1.4-py2.py3-none-any.whl Collecting python-dateutil>=2.0 (from matplotlib) Downloading python_dateutil-2.6.1-py2.py3-none-any.whl (194kB) 100% |████████████████████████████████| 194kB 7.3MB/s Collecting numpy>=1.7.1 (from matplotlib) Downloading numpy-1.13.3-cp27-cp27mu-manylinux1_x86_64.whl (16.6MB) 100% |████████████████████████████████| 16.7MB 7.5MB/s Collecting cycler>=0.10 (from matplotlib) Downloading cycler-0.10.0-py2.py3-none-any.whl Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib) Downloading pyparsing-2.2.0-py2.py3-none-any.whl (56kB) 100% |████████████████████████████████| 61kB 10.2MB/s Collecting six>=1.10 (from matplotlib) Downloading six-1.11.0-py2.py3-none-any.whl Collecting pytz (from matplotlib) Downloading pytz-2017.3-py2.py3-none-any.whl (511kB) 100% |████████████████████████████████| 512kB 9.5MB/s Collecting subprocess32 (from matplotlib) Downloading subprocess32-3.2.7.tar.gz (54kB) 100% |████████████████████████████████| 61kB 17.6MB/s Installing collected packages: backports.functools-lru-cache, six, python-dateutil, numpy, cycler, pyparsing, pytz, subprocess32, matplotlib Running setup.py install for subprocess32 ... done Successfully installed backports.functools-lru-cache-1.4 cycler-0.10.0 matplotlib-2.1.0 numpy-1.13.3 pyparsing-2.2.0 python-dateutil-2.6.1 pytz-2017.3 six-1.11.0 subprocess32-3.2.7ImportError:
(test_matplotlib_install) paul@paul-XPS-15-9560:~⟫ ipython /usr/local/lib/python2.7/dist-packages/IPython/core/interactiveshell.py:726: UserWarning: Attempting to work in a virtualenv. If you encounter problems, please install IPython inside the virtualenv. warn("Attempting to work in a virtualenv. If you encounter problems, please " Python 2.7.13 (default, Jan 19 2017, 14:48:08) Type "copyright", "credits" or "license" for more information. IPython 5.4.1 -- 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. --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-1-5cdaae59dc80> in <module>() ----> 1 import numpy as np; import matplotlib.pyplot as plt /home/paul/.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages/matplotlib/__init__.py in <module>() 126 _backports, mplDeprecation, dedent, get_label, sanitize_sequence) 127 from matplotlib.compat import subprocess --> 128 from matplotlib.rcsetup import defaultParams, validate_backend, cycler 129 130 import numpy /home/paul/.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages/matplotlib/rcsetup.py in <module>() 27 28 from matplotlib.cbook import mplDeprecation, deprecated, ls_mapper ---> 29 from matplotlib.fontconfig_pattern import parse_fontconfig_pattern 30 from matplotlib.colors import is_color_like 31 /home/paul/.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py in <module>() 30 from functools import lru_cache 31 except ImportError: ---> 32 from backports.functools_lru_cache import lru_cache 33 34 family_punc = r'\\\-:,' ImportError: No module named functools_lru_cachetacaswell commented on Nov 24, 2017
It looks like you are pulling IPython from the system level but still importing some things from the venv.
Also check what is in sys.path. I suspect you have both the system python paths and the venv paths in there.
jklymak commented on Nov 24, 2017
The first line of your output indicates what the problem likely is and how to fix it ;-)
paulbrodersen commented on Nov 24, 2017
Installing ipython inside the venv has no effect:
(test_matplotlib_install) paul@paul-XPS-15-9560:~⟫ pip install --no-cache-dir ipython Collecting ipython Downloading ipython-5.5.0-py2-none-any.whl (758kB) 100% |████████████████████████████████| 768kB 11.7MB/s Requirement already satisfied: setuptools>=18.5 in ./.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages (from ipython) Collecting backports.shutil-get-terminal-size; python_version == "2.7" (from ipython) Downloading backports.shutil_get_terminal_size-1.0.0-py2.py3-none-any.whl Collecting pickleshare (from ipython) Downloading pickleshare-0.7.4-py2.py3-none-any.whl Collecting simplegeneric>0.8 (from ipython) Downloading simplegeneric-0.8.1.zip Collecting decorator (from ipython) Downloading decorator-4.1.2-py2.py3-none-any.whl Collecting prompt-toolkit<2.0.0,>=1.0.4 (from ipython) Downloading prompt_toolkit-1.0.15-py2-none-any.whl (247kB) 100% |████████████████████████████████| 256kB 9.9MB/s Collecting pexpect; sys_platform != "win32" (from ipython) Downloading pexpect-4.3.0-py2.py3-none-any.whl (55kB) 100% |████████████████████████████████| 61kB 20.5MB/s Collecting pathlib2; python_version == "2.7" or python_version == "3.3" (from ipython) Downloading pathlib2-2.3.0-py2.py3-none-any.whl Collecting pygments (from ipython) Downloading Pygments-2.2.0-py2.py3-none-any.whl (841kB) 100% |████████████████████████████████| 849kB 9.0MB/s Collecting traitlets>=4.2 (from ipython) Downloading traitlets-4.3.2-py2.py3-none-any.whl (74kB) 100% |████████████████████████████████| 81kB 11.4MB/s Requirement already satisfied: six>=1.9.0 in ./.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages (from prompt-toolkit<2.0.0,>=1.0.4->ipython) Collecting wcwidth (from prompt-toolkit<2.0.0,>=1.0.4->ipython) Downloading wcwidth-0.1.7-py2.py3-none-any.whl Collecting ptyprocess>=0.5 (from pexpect; sys_platform != "win32"->ipython) Downloading ptyprocess-0.5.2-py2.py3-none-any.whl Collecting scandir; python_version < "3.5" (from pathlib2; python_version == "2.7" or python_version == "3.3"->ipython) Downloading scandir-1.6.tar.gz Collecting ipython-genutils (from traitlets>=4.2->ipython) Downloading ipython_genutils-0.2.0-py2.py3-none-any.whl Collecting enum34; python_version == "2.7" (from traitlets>=4.2->ipython) Downloading enum34-1.1.6-py2-none-any.whl Installing collected packages: backports.shutil-get-terminal-size, scandir, pathlib2, pickleshare, simplegeneric, decorator, wcwidth, prompt-toolkit, ptyprocess, pexpect, pygments, ipython-genutils, enum34, tra$tlets, ipython Running setup.py install for scandir ... done Running setup.py install for simplegeneric ... done Successfully installed backports.shutil-get-terminal-size-1.0.0 decorator-4.1.2 enum34-1.1.6 ipython-5.5.0 ipython-genutils-0.2.0 pathlib2-2.3.0 pexpect-4.3.0 pickleshare-0.7.4 prompt-toolkit-1.0.15 ptyprocess-$.5.2 pygments-2.2.0 scandir-1.6 simplegeneric-0.8.1 traitlets-4.3.2 wcwidth-0.1.7ImportError:
(test_matplotlib_install) paul@paul-XPS-15-9560:~⟫ ipython /usr/local/lib/python2.7/dist-packages/IPython/core/interactiveshell.py:726: UserWarning: Attempting to work in a virtualenv. If you encounter problems, please install IPython inside the virtualenv. warn("Attempting to work in a virtualenv. If you encounter problems, please " Python 2.7.13 (default, Jan 19 2017, 14:48:08) Type "copyright", "credits" or "license" for more information. IPython 5.4.1 -- 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. --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-1-5cdaae59dc80> in <module>() ----> 1 import numpy as np; import matplotlib.pyplot as plt /home/paul/.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages/matplotlib/__init__.py in <module>() 126 _backports, mplDeprecation, dedent, get_label, sanitize_sequence) 127 from matplotlib.compat import subprocess --> 128 from matplotlib.rcsetup import defaultParams, validate_backend, cycler 129 130 import numpy /home/paul/.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages/matplotlib/rcsetup.py in <module>() 27 28 from matplotlib.cbook import mplDeprecation, deprecated, ls_mapper ---> 29 from matplotlib.fontconfig_pattern import parse_fontconfig_pattern 30 from matplotlib.colors import is_color_like 31 /home/paul/.virtualenvs/test_matplotlib_install/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py in <module>() 30 from functools import lru_cache 31 except ImportError: ---> 32 from backports.functools_lru_cache import lru_cache 33 34 family_punc = r'\\\-:,' ImportError: No module named functools_lru_cachepaulbrodersen commented on Nov 24, 2017
I do have weird stuff in my sys.path, and I am unsure how that stuff got there as I just created the venv. However, as far as I can see, site-packages are only imported from .virtualenvs/test_matplotlib_install/lib/python2.7/site-packages, so it seems to me that I am not importing another matplotlib version from somewhere else.
paulbrodersen commented on Nov 24, 2017
@jklymak Which line are you referring to?
jklymak commented on Nov 24, 2017
So the ipython you are calling is not in your virtualenv. In fact, as you can clearly see above, the versions are diferent; 5.4.1 is what you call, and 5.5.0 is what you installed.
Unless you like banging your head against a wall or have some compelling use-case that precludes it, I strongly suggest using anaconda. I'm sure all that /usr/lib/ stuff is whats causing you grief.
2 remaining items
paulbrodersen commented on Nov 24, 2017
It seems unlikely that I would have had a matplotlib path already cached. I opened a new shell before initializing the venv. In my window manager (byobu) the hash table is empty when I initialize a new shell. Anyway, I am fairly happy now (albeit still confused). Thanks for all the help!
WeatherGod commented on Nov 27, 2017
skyson commented on Feb 6, 2018
come across with problem, after uninstall the matplotlib and install the privious version 2.0.2, the problem is solved
nadnerbity commented on May 24, 2018
Same as above: #9344 but I don't have anything funny in my path, I am not using a virtual environment and have installed everything using apt (I'm on Ubuntu 18.04). If I go back to matplotlib 2.0.2 using pip then it works, so I'm going with that for now, but I'd rather not use a billion installers.
I'm having this problem with matplotlib 2.1+ too, but only with Python:
Python 2.7.15rc1 (default, Apr 15 2018, 21:51:34) [GCC 7.3.0] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import matplotlib Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/user/.local/lib/python2.7/site-packages/matplotlib/__init__.py", line 131, in <module> from matplotlib.rcsetup import defaultParams, validate_backend, cycler File "/home/user/.local/lib/python2.7/site-packages/matplotlib/rcsetup.py", line 29, in <module> from matplotlib.fontconfig_pattern import parse_fontconfig_pattern File "/home/user/.local/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py", line 28, in <module> from backports.functools_lru_cache import lru_cache ImportError: No module named functools_lru_cacheWhen I use iPython everything is peachy:
I am not at all sure what is causing this. I suspect there is some local vs system library thing going on. How do I fix this?
Update:
If I import pip before attempting to import matplotlib, it works in python.
It looks like importing pip changes at least the sys.path but I can't tell why what it is doing matters and how that relates to ipython.
Update #2:
I suspect no one is reading this but I figured out what is going on. Rather why ipython works and python doesn't. It is a path issue but I am not sure why it is a path issue. I had a stack exchange Q up too, which can be found here: https://stackoverflow.com/questions/50538327/python-matplotlib-loads-using-ipython-but-not-using-python.
The problem appears to be a path problem I am not sure how to solve. I use apt on Ubuntu 18.04 to install system modules into /usr/lib/python2.7/dist-packages/. This directory is where backports.functools_lru_cache lives. I also have some compiled modules installed in /usr/local/lib/python2.7/dist-packages/ where there is a backports module WITHOUT functools_lru_cache. The problem is that python is not following the system path and only seems to be looking in /usr/local/lib/python2.7/dist-packages/ for backports. However, ipython looks in both which is why ipython was working while python was not.
python:
ipython:
Solution:
To solve the problem I manually copied functools_lru_cache.py from /usr/lib/python2.7/dist-packages/backports/ to /usr/local/lib/python2.7/dist-packages/backports/. Now I can run matplotlib 2.2.2 no problem in python and ipython.
It isn't clear to my why python and ipython are ignoring my request to reorder the path. My suspicion is that it has to do with backports being "built-in" now. I have another machine running 2.7.12 and it doesn't have this problem and backports isn't built in. ipython works because it looks in two places.
andrewyong87 commented on Aug 21, 2018
@nadnerbity you idea is useful to me, I met the same error, both the os version and the dependencies packages are same with your's. Follow your way I fixed the error.
solatale commented on Sep 5, 2018
In my case, I pip installed the package named "backports-functools_lru_cache" for MacOSX.
Borda commented on Jan 2, 2019
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
ha7ilm commented on Mar 4, 2019
I solved it by installing the following from the Ubuntu repos:
rocchow commented on Apr 22, 2019
I updated to Ubuntu 19.04 and used this method to resolve.
tacaswell commented on Apr 22, 2019
@sandrotosi This suggests that there is a bug in the py2 dependencies for the debian packaging?
sandrotosi commented on Apr 23, 2019
@tacaswell it's highly unlikely something in Debian is not ok with dependencies, as there would be people screaming all over the place and this is the first time i heard about this :)
the OP is on Mac, and the 2 latest users look like they are using Ubuntu, which may have a more original way of handling dependencies due to their main/universe repos separations, but i cant comment on Ubuntu as i dont maintain the package there
let me know if i can help in any way tho
tacaswell commented on Apr 23, 2019
Ah, sorry to bother you @sandrotosi , I thought the debian -> ubuntu pipeline was more direct.
https://bugs.launchpad.net/ubuntu/+source/matplotlib/+bug/1764823 For ubuntu it looks like there is an open issue about this problem (that is blamed an the python-backports.functools-lru-cache package missing a file!).
sandrotosi commented on Apr 23, 2019
ah yeah, when i first introduce backports.funtools_lru_cache i had issues as well in defining the namespace backports in Debian, and had to fix a couple of other packages sharing that namespace to have them all cooperate
aaronjs99 commented on May 3, 2020
This helped. Thanks!!!
marwan2akram commented on May 7, 2020
sudo apt install python-backports.functools-lru-cache
it worked with me