Cannot import pyplot #12173
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Same on a mac installed with conda if (mat_bug_py37) moonbase:~ lloyd$ ls -al /Users/lloyd/.matplotlib/fontlist-v300.json
-rw-r--r-- 1 lloyd staff 130027 Sep 19 10:45 /Users/lloyd/.matplotlib/fontlist-v300.json
(mat_bug_py37) moonbase:~ lloyd$ python -c 'from matplotlib import pyplot'
(mat_bug_py37) moonbase:~ lloyd$ rm /Users/lloyd/.matplotlib/fontlist-v300.json
(mat_bug_py37) moonbase:~ lloyd$ python -c 'from matplotlib import pyplot'hangs.... ctl-c ^CTraceback (most recent call last):
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 1353, in <module>
fontManager = json_load(_fmcache)
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 888, in json_load
with open(filename, 'r') as fh:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/lloyd/.matplotlib/fontlist-v300.json'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/pyplot.py", line 32, in <module>
import matplotlib.colorbar
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/colorbar.py", line 32, in <module>
import matplotlib.contour as contour
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/contour.py", line 18, in <module>
import matplotlib.font_manager as font_manager
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 1363, in <module>
_rebuild()
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 1344, in _rebuild
fontManager = FontManager()
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 978, in __init__
ttffiles = findSystemFonts(paths) + findSystemFonts()
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 270, in findSystemFonts
fontfiles.update(OSXInstalledFonts(fontext=fontext))
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 218, in OSXInstalledFonts
for directory in directories
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 220, in <listcomp>
for path in list_fonts(directory, ext)]
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 157, in list_fonts
for path in filter(Path.is_file, Path(directory).glob("**/*.*"))
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/site-packages/matplotlib/font_manager.py", line 156, in <listcomp>
return [str(path)
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/pathlib.py", line 1344, in is_file
return S_ISREG(self.stat().st_mode)
File "/Users/lloyd/anaconda2/envs/mat_bug_py37/lib/python3.7/pathlib.py", line 1140, in stat
return self._accessor.stat(self)
KeyboardInterrupt
^C
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I have the same issue, the same error. matplotlib 3.00. Doesn't find fontlist-v300.json |
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Not finding that file in fine, it is a cache and automatically re-generated. |
from matplotlib.font_manager import win32InstalledFonts
print(win32InstalledFonts())Output: Added logging to import winreg
from matplotlib.font_manager import MSFontDirectories, win32FontDirectory
from pathlib import Path
fontext = 'ttf'
directory = win32FontDirectory()
items = set()
for fontdir in MSFontDirectories:
try:
with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, fontdir) as local:
for j in range(winreg.QueryInfoKey(local)[1]):
key, direc, tp = winreg.EnumValue(local, j)
if not isinstance(direc, str):
print('Skipped "{}" because is of type: {}'.format(direc, type(direc)))
continue
# Work around for https://bugs.python.org/issue25778, which
# is fixed in Py>=3.6.1.
direc = direc.split("\0", 1)[0]
path = Path(directory, direc).resolve()
if path.suffix.lower() in fontext:
items.add(str(path))
else:
print('Skipped "{}" because font format "{}" is not supported'.format(path, path.suffix.lower()))
print('Return font list: {}'.format(list(items)))
break
except (OSError, MemoryError) as e:
print('Skipped "{}" because of error: {}'.format(fontdir, e))
continueOutput: So we have a problem... |
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There are more problem usages of
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Kojoley
added a commit
that referenced
this issue
Sep 22, 2018
The problem is that `Path(...).suffix` includes the dot, so ``.ttf` in 'ttf'` gives `False`. Also fixed other suffix usages. Fixes #12173
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Thanks for investigating. |
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Oops, that's something I had misconception, I thought |
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For lists too you can pass an "invalid" slice and it'll just give you an empty list. |
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#12212 will not solve the issue. The |
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I think #12174 is just fine to handle this case. Perhaps we were just lucky not to have run into that before? |
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I don't think we should overly bother about cases where well-documented regsitry keys are missing (i.e. I don't think we should try too hard to find the fonts in that case). |
1 task
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I am not sure what is the purpose of matplotlib/lib/matplotlib/font_manager.py Line 275 in 333dad1 win32FontDirectory()
Is not |
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Well, at least technically win32InstalledFonts can return fonts that are not in win32FontDirectory(), as the registry can specify absolute paths (https://superuser.com/a/1258913/41302). |
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Well, then I am taking back my last message... So, may be than solve the both problems (#12174 (comment) and #12173/#12213) by replacing matplotlib/lib/matplotlib/font_manager.py Line 209 in 333dad1 return list(items)?
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6 tasks
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That'll be [] in any case, no? |
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No, for example if |
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Then just change to call EnumValue until it raises OSError, as officially documented? (https://docs.python.org/3/library/winreg.html#winreg.EnumValue) |
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I think changing matplotlib/lib/matplotlib/font_manager.py Line 206 in 333dad1 |
That seems actually the best solution. Thanks for spotting the details. |
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Closed in #12213 |
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Unfortunately, no. |
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Hi, I just downloaded and am still getting the same error: Any other ideas? |
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@sebastianjungels what did you put in the missing file? |
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Hi, I got the file from a colleague who didn't face the problem.
Let me know if you need it.
Thanks,
Sebastian
…________________________________
From: Thomas A Caswell <notifications@github.com>
Sent: Friday, October 5, 2018 4:23:05 PM
To: matplotlib/matplotlib
Cc: Sebastian Jungels; Mention
Subject: Re: [matplotlib/matplotlib] Cannot import pyplot (#12173)
@sebastianjungels<https://github.com/sebastianjungels> what did you put in the missing file?
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub<#12173 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/ApAv0T5MPBaEsgV6Sgad7Zs2Acp4ePqMks5uh825gaJpZM4WwVec>.
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I would not have thought to try that.... Given that the cache encodes some local paths I am a bit surprised that this works.... |
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@sebastianjungels Can you please install a snapshot build from #12416 (wheels 3.5 3.6 3.7) and provide us a traceback of the error? |
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@Kojoley sure, I can do that. However, I am fairly new to git and am not sure how I can install that build. can you point me to a link or provide the steps? Cheers |
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I have included links to wheels in my last post. You should be able to install one with |
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Just experienced this issue in a conda environment with I guess this is the best workaround until this fix is released? |
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@drdavella The OP here is a windows-specific bug (issues with getting keys out of the the windows registry) so I suspect you were seeing a different issue. I am very confused by the report that changing what directory you are in making a difference, but if it does, that is almost certainly a bug we need to fix! Can you open a new issue with more detials (if you can still reproduce the issue). |
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@tacaswell, oops I guess I skimmed this a little too quickly! Yes I can still reproduce it, so I'll open a new issue presently. UPDATE: See #12556 |
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Just wanted to add that as of today I can still reproduce it. Using Windows 10 with a 32-bit version of Python 3.5.2, installed mathplotlib via pip, and I get the exact same error when importing the module. |
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@deansg That is expected, the fix is in the source but has not been released yet. The current plan is to release 3.0.1 around Nov 3. |
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@tacaswell Alright, I wasn't sure about it because after reading the entire exchange, at one point the focus shifted to a (possibly different?) bug in OSX and I couldn't figure out what the current status is. Maybe it will be beneficial to include an explicit workaround in the description (such as downgrading to 2.2.3)? |
10 tasks
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What is the solution for this? |
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@erotavlas you should be able to install 3.0.1 using conda now. |
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@drdavella it wont let me, either from the prompt (conda update matplotlib) or from the anaconda navigator...it says "All requested packaged already installed " |
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Just installed v3.0.2 and am getting the exact same error. Python 3.6.0. Windows 8.1. |
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Are you all getting v3.0.1 now? My conda still only has v3.0.0 (python 3.6.8). Actually v3.0.0 has been working fine for me, until I did the following update recently, then I started to get this error: The following packages will be UPDATED: Update: I installed v.3.0.2 from conda-forge channel and the issue is fixed. |
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Unfortunately, I have encountered the same issue just now. I needed seaborn because it seemed not be installed (oddly), so I ran Next, I receive a warning that a newer conda version exists 4.5.12 while I was running 4.511. So I follow instructions to update that. It all proceeds to downloading a number of packages including seaborn-0.9.0 and matplotlib-3.0.0 All funky, apparently, until I run import matplotlib and I get the error: I'm now stuck without a functioning matplotlib. To fix this problem, I try this: Same problem and worse because it wants to now downgrade a ton of packages. I rejected this install. What do I do now? |
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This issue is still reproduced for me on gentoo linux for python 3.6.10 + matplotlib 3.1.2 with error about no such file in "/home/user/.cache/matplotlib/fontlist-v310.json" |
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Bug report
Bug summary
I am unable to
import matplotlib.pyplotstarting in version 3.0.0. Might be related to Issue #9485?Code for reproduction
Actual outcome
I get the following traceback when executing the above
importMatplotlib version
Installed via
pipThe text was updated successfully, but these errors were encountered: