'RuntimeError: implement_array_function method already has a docstring' after matplotlib installation

I’m using numpy==1.18.1 within a conda environment. Everything worked fine until I installed matplotlib==3.1.3 yesterday. After matplotlib has been installed (successfully), and I try to import either matplotlib or numpy using

import numpy

or

import matplotlib

I get the following error:

Error message:

`Traceback (most recent call last): File “C:\Users\user\AppData\Roaming\Python\Python36\site- packages\IPython\core\interactiveshell.py”, line 2963, in run_code exec(code_obj, self.user_global_ns, self.user_ns)

File “<ipython-input-2-0484cd13f94d>”, line 1, in <module> import matplotlib File “C:\Program Files\JetBrains\PyCharm 2019.2.3\helpers\pydev_pydev_bundle\pydev_import_hook.py”, line 21, in do_import module = self.system_import(name, *args, **kwargs) File "C:\Users\user\Anaconda3\envs\ma-automl-ppm\lib\site-packages\matplotlib_init.py", line 138, in <module> from . import cbook, rcsetup File “C:\Program Files\JetBrains\PyCharm 2019.2.3\helpers\pydev_pydev_bundle\pydev_import_hook.py”, line 21, in do_import module = self.system_import(name, *args, **kwargs) File "C:\Users\user\Anaconda3\envs\ma-automl-ppm\lib\site- packages\matplotlib\cbook_init.py", line 31, in <module> import numpy as np File “C:\Program Files\JetBrains\PyCharm 2019.2.3\helpers\pydev_pydev_bundle\pydev_import_hook.py”, line 21, in do_import module = self.system_import(name, *args, **kwargs) File "C:\Users\user\Anaconda3\envs\ma-automl-ppm\lib\site-packages\numpy_init.py", line 142, in <module> from . import core File “C:\Program Files\JetBrains\PyCharm 2019.2.3\helpers\pydev_pydev_bundle\pydev_import_hook.py”, line 21, in do_import module = self.system_import(name, *args, **kwargs) File "C:\Users\user\Anaconda3\envs\ma-automl-ppm\lib\site-packages\numpy\core_init.py", line 24, in <module> from . import multiarray File “C:\Program Files\JetBrains\PyCharm 2019.2.3\helpers\pydev_pydev_bundle\pydev_import_hook.py”, line 21, in do_import module = self._system_import(name, *args, **kwargs) File “C:\Users\user\Anaconda3\envs\ma-automl-ppm\lib\site- packages\numpy\core\multiarray.py”, line 14, in <module> from . import overrides File “C:\Program Files\JetBrains\PyCharm 2019.2.3\helpers\pydev_pydev_bundle\pydev_import_hook.py”, line 21, in do_import module = self._system_import(name, *args, **kwargs) File “C:\Users\user\Anaconda3\envs\ma-automl-ppm\lib\site-packages\numpy\core\overrides.py”, line 47, in <module> “”") RuntimeError: implement_array_function method already has a docstring`

Numpy/Python version information:

‘3.6.9 |Anaconda, Inc.| (default, Jul 30 2019, 14:00:49) [MSC v.1915 64 bit (AMD64)]’

installed packages within the virtual environment:

absl-py 0.9.0 alembic 1.3.2 astor 0.8.1 autokeras 1.0.0 backcall 0.1.0 bleach 2.1.3 cachetools 4.0.0 certifi 2019.11.28 chardet 3.0.4 ciso8601 2.1.2 Click 7.0 colorama 0.3.9 cycler 0.10.0 dash 1.7.0 dash-bootstrap-components 0.7.2 dash-core-components 1.6.0 dash-daq 0.3.1 dash-html-components 1.0.2 dash-renderer 1.2.2 dash-table 4.5.1 decorator 4.3.0 dnspython 1.16.0 entrypoints 0.2.3 eventlet 0.25.1 Flask 1.1.1 Flask-Caching 1.8.0 Flask-Compress 1.4.0 Flask-Migrate 2.5.2 Flask-SocketIO 4.2.1 Flask-SQLAlchemy 2.4.1 future 0.18.2 gast 0.2.2 google-auth 1.11.0 google-auth-oauthlib 0.4.1 google-pasta 0.1.8 graphviz 0.13.2 greenlet 0.4.15 grpcio 1.26.0 h5py 2.10.0 html5lib 1.0.1 idna 2.8 intervaltree 3.0.2 ipykernel 4.8.2 ipython 6.4.0 ipython-genutils 0.2.0 ipywidgets 7.2.1 itsdangerous 1.1.0 jedi 0.12.0 Jinja2 2.10.3 joblib 0.14.1 jsonschema 2.6.0 jupyter 1.0.0 jupyter-client 5.2.3 jupyter-console 5.2.0 jupyter-core 4.4.0 Keras 2.3.1 Keras-Applications 1.0.8 Keras-Preprocessing 1.1.0 keras-tuner 1.0.1 kiwisolver 1.0.1 lightgbm 2.3.1 lxml 4.4.2 Mako 1.1.0 Markdown 3.1.1 MarkupSafe 1.0 matplotlib 3.1.3 mistune 0.8.3 mkl-fft 1.0.15 mkl-random 1.1.0 mkl-service 2.3.0 monotonic 1.5 mpmath 1.0.0 nbconvert 5.3.1 nbformat 4.4.0 networkx 2.4 nose 1.3.7 notebook 5.5.0 numpy 1.18.1 oauthlib 3.1.0 opt-einsum 3.1.0 opyenxes 0.3.0 ortools 7.4.7247 packaging 20.1 pandas 0.25.3 pandocfilters 1.4.2 parso 0.2.1 pickleshare 0.7.4 pip 19.3.1 plotly 4.4.1 pm4py 1.2.8 prompt-toolkit 1.0.15 protobuf 3.11.2 psutil 5.6.5 PuLP 2.0 pyarrow 0.15.1 pyasn1 0.4.8 pyasn1-modules 0.2.8 pydotplus 2.0.2 Pygments 2.4.2 pyparsing 2.2.0 python-dateutil 2.7.3 python-editor 1.0.4 python-engineio 3.10.0 python-socketio 4.4.0 pytz 2019.3 pyvis 0.1.7.0 pywinpty 0.5.3 PyYAML 5.3 pyzmq 17.0.0 qtconsole 4.3.1 requests 2.22.0 requests-oauthlib 1.3.0 retrying 1.3.3 rsa 4.0 scikit-learn 0.22.1 scipy 1.4.1 Send2Trash 1.5.0 setuptools 42.0.1.post20191125 simplegeneric 0.8.1 six 1.11.0 sklearn 0.0 sortedcontainers 2.1.0 SQLAlchemy 1.3.12 sympy 1.1.1 tabulate 0.8.6 tensorboard 2.0.2 tensorflow 2.0.0 tensorflow-estimator 2.0.1 termcolor 1.1.0 terminado 0.8.1 terminaltables 3.1.0 testpath 0.3.1 tornado 5.0.2 tqdm 4.41.1 traitlets 4.3.2 urllib3 1.25.7 wcwidth 0.1.7 webencodings 0.5.1 websockets 8.1 Werkzeug 0.16.0 wheel 0.33.6 widgetsnbextension 3.2.1 wincertstore 0.2 wrapt 1.11.2

[Louagyd]

you can simply just try matplotlib==3.0.3

[anhzhi]

This issue may occure when numpy/matplotlib or their requiment packages degraded, with their dependency broken and version requiments not met.

For example: install package of six to 1.5.6, which break the requirement six>=1.10 of matplotlib 2.2.5 . Then this issue happens.

I found a solution that works in Pycharm.

1. clean cache of numpy in pycharm which seems like C:\Users\anhzhi.PyCharm2019.3*numpy*
2. remove pyc in Program Folder for JetBrains
3. reinstall numpy/matplotlib and check their requiments strickly met.
4. restart Pycharm and make sure numpy can import.

I think step 3 is key and make use, while step 1 and 2 explains why this issue not happens outside pycharm. I use “Everything” to find those matched files in step 1 and step 2.

I wish my comment can help.