René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Permission denied when importing matplotlib.pyplot","articleBody":"### Bug summary\r\n\r\nOnce I type \" import matplotlib.pyplot as plt\" and run it, jupyter always returns：\r\n＂Matplotlib is building the font cache; this may take a moment.＂\r\n＃Then the return messages will end up as ：\r\n \"PermissionError: [Errno 13] Permission denied: 'C:\\\\Users\\\\J\\\\.matplotlib\\\\fontlist-v330.json.matplotlib-lock'\r\n\r\nAnd the functions of matplotlib.pyplot can not be excuted.\r\n\r\n### Code for reproduction\r\n\r\n```Python\r\nimport matplotlib.pyplot as plt\r\n```\r\n\r\n\r\n### Actual outcome\r\n```\r\nMatplotlib is building the font cache; this may take a moment.\r\n\r\nPermissionError                           Traceback (most recent call last)\r\nCell In[3], line 1\r\n----\u003e 1 import matplotlib.pyplot as plt\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\pyplot.py:56\r\n     54 from cycler import cycler\r\n     55 import matplotlib\r\n---\u003e 56 import matplotlib.colorbar\r\n     57 import matplotlib.image\r\n     58 from matplotlib import _api\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\colorbar.py:19\r\n     16 import numpy as np\r\n     18 import matplotlib as mpl\r\n---\u003e 19 from matplotlib import _api, cbook, collections, cm, colors, contour, ticker\r\n     20 import matplotlib.artist as martist\r\n     21 import matplotlib.patches as mpatches\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\contour.py:15\r\n     13 import matplotlib as mpl\r\n     14 from matplotlib import _api, _docstring\r\n---\u003e 15 from matplotlib.backend_bases import MouseButton\r\n     16 from matplotlib.lines import Line2D\r\n     17 from matplotlib.path import Path\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\backend_bases.py:46\r\n     43 import numpy as np\r\n     45 import matplotlib as mpl\r\n---\u003e 46 from matplotlib import (\r\n     47     _api, backend_tools as tools, cbook, colors, _docstring, text,\r\n     48     _tight_bbox, transforms, widgets, is_interactive, rcParams)\r\n     49 from matplotlib._pylab_helpers import Gcf\r\n     50 from matplotlib.backend_managers import ToolManager\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\text.py:16\r\n     14 from . import _api, artist, cbook, _docstring\r\n     15 from .artist import Artist\r\n---\u003e 16 from .font_manager import FontProperties\r\n     17 from .patches import FancyArrowPatch, FancyBboxPatch, Rectangle\r\n     18 from .textpath import TextPath, TextToPath  # noqa # Logically located here\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\font_manager.py:1582\r\n   1578     _log.info(\"generated new fontManager\")\r\n   1579     return fm\r\n-\u003e 1582 fontManager = _load_fontmanager()\r\n   1583 findfont = fontManager.findfont\r\n   1584 get_font_names = fontManager.get_font_names\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\font_manager.py:1577, in _load_fontmanager(try_read_cache)\r\n   1575             return fm\r\n   1576 fm = FontManager()\r\n-\u003e 1577 json_dump(fm, fm_path)\r\n   1578 _log.info(\"generated new fontManager\")\r\n   1579 return fm\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\font_manager.py:963, in json_dump(data, filename)\r\n    946 def json_dump(data, filename):\r\n    947     \"\"\"\r\n    948     Dump `FontManager` *data* as JSON to the file named *filename*.\r\n    949 \r\n   (...)\r\n    961     processes from overwriting one another's output.\r\n    962     \"\"\"\r\n--\u003e 963     with cbook._lock_path(filename), open(filename, 'w') as fh:\r\n    964         try:\r\n    965             json.dump(data, fh, cls=_JSONEncoder, indent=2)\r\n\r\nFile ~\\anaconda3\\Lib\\contextlib.py:137, in _GeneratorContextManager.__enter__(self)\r\n    135 del self.args, self.kwds, self.func\r\n    136 try:\r\n--\u003e 137     return next(self.gen)\r\n    138 except StopIteration:\r\n    139     raise RuntimeError(\"generator didn't yield\") from None\r\n\r\nFile ~\\anaconda3\\Lib\\site-packages\\matplotlib\\cbook.py:1821, in _lock_path(path)\r\n   1819 for _ in range(retries):\r\n   1820     try:\r\n-\u003e 1821         with lock_path.open(\"xb\"):\r\n   1822             break\r\n   1823     except FileExistsError:\r\n\r\nFile ~\\anaconda3\\Lib\\pathlib.py:1013, in Path.open(self, mode, buffering, encoding, errors, newline)\r\n   1011 if \"b\" not in mode:\r\n   1012     encoding = io.text_encoding(encoding)\r\n-\u003e 1013 return io.open(self, mode, buffering, encoding, errors, newline)\r\n\r\nPermissionError: [Errno 13] Permission denied: 'C:\\\\Users\\\\happy\\\\.matplotlib\\\\fontlist-v330.json.matplotlib-lock'\r\n\r\n### Expected outcome\r\n\r\nThe expected outcome is to successful import matplotlib.pyplot. \r\n(Ｓｏｒｒｙ　ｔｏ　ｂｏｔｈｅｒ　ｙｏｕ．\r\nI have struggled with this for more than 2 weeks and searched different methods to resolve it. But, ...\r\nPlease help me to out of this, many many thanks!)\r\n\r\n### Additional information\r\n\r\n＊What are the conditions under which this bug happens? input parameters, edge cases, etc?\r\nAns: When I type \" import matplotlib.pyplot as plt\" and run it in the Jupyter Notebook.\r\n＊Has this worked in earlier versions? \r\nAns:　No. \r\n＊Do you know why this bug is happening?\r\nＡｎｓ：　 No. \r\n＊Do you maybe even know a fix? \r\nＡｎｓ：No.\r\nI have tried a lot of times to figure out this import problem, including uninstall/reinstall anaconda, python, upgrade the version of matplotlib......\r\n Based on the google search results, I also tried to type\r\n \"import matplotlib matplotlib.use('TkAgg')\" \r\nbefore I import matplotlib.pyplot. \r\nBut it returns me \r\n＂Cell In[2], \r\nline 1     import matplotlib matplotlib.use('TkAgg')                       \r\n^ SyntaxError: invalid syntax＂\r\n```\r\n\r\n### Operating system\r\n\r\nＷｉｎｄｏｗｓ\r\n\r\n### Matplotlib Version\r\n\r\nmatplotlib 3.8.4\r\n\r\n### Matplotlib Backend\r\n\r\nmatplotlib-inline 0.1.6\r\n\r\n### Python version\r\n\r\nPython 3.12.3\r\n\r\n### Jupyter version\r\n\r\nＪｕｐｙｔｅｒ　7.0.8\r\n\r\n### Installation\r\n\r\nconda\r\n\r\n\r\n[TAC edited to add markup]","author":{"url":"https://github.com/JCisCS","@type":"Person","name":"JCisCS"},"datePublished":"2024-07-11T10:08:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/28538/matplotlib/issues/28538"}