<p dir="auto"><strong>AttributeError: module 'sip' has no attribute 'setapi'</strong></p>
<p dir="auto">Error appears for this one line code <code class="notranslate">import matplotlib.pyplot as plt</code></p>
<p dir="auto"><strong>Actual outcome</strong></p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Traceback (most recent call last):
  File &quot;e:\GoogleDriveBB\Program\bb_git_repo\test.py&quot;, line 5, in &lt;module&gt;
    import matplotlib.pyplot as plt
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py&quot;, line 2336, in &lt;module&gt;
    switch_backend(rcParams[&quot;backend&quot;])
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\__init__.py&quot;, line 703, in __getitem__
    plt.switch_backend(rcsetup._auto_backend_sentinel)
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py&quot;, line 256, in switch_backend
    switch_backend(candidate)
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py&quot;, line 276, in switch_backend
    class backend_mod(matplotlib.backend_bases._Backend):
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py&quot;, line 277, in backend_mod
    locals().update(vars(importlib.import_module(backend_name)))
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\importlib\__init__.py&quot;, line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\backend_qt5agg.py&quot;, line 11, in &lt;module&gt;
    from .backend_qt5 import (
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\backend_qt5.py&quot;, line 16, in &lt;module&gt;
    import matplotlib.backends.qt_editor.figureoptions as figureoptions
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_editor\figureoptions.py&quot;, line 11, in &lt;module&gt;
    from matplotlib.backends.qt_compat import QtGui
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_compat.py&quot;, line 172, in &lt;module&gt;
    _setup()
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_compat.py&quot;, line 132, in _setup_pyqt4
    _setup_pyqt4_internal(api=2)
  File &quot;C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_compat.py&quot;, line 115, in _setup_pyqt4_internal
    sip.setapi(_sip_api, api)
AttributeError: module 'sip' has no attribute 'setapi'"><pre class="notranslate"><code class="notranslate">Traceback (most recent call last):
  File "e:\GoogleDriveBB\Program\bb_git_repo\test.py", line 5, in &lt;module&gt;
    import matplotlib.pyplot as plt
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py", line 2336, in &lt;module&gt;
    switch_backend(rcParams["backend"])
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\__init__.py", line 703, in __getitem__
    plt.switch_backend(rcsetup._auto_backend_sentinel)
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py", line 256, in switch_backend
    switch_backend(candidate)
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py", line 276, in switch_backend
    class backend_mod(matplotlib.backend_bases._Backend):
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\pyplot.py", line 277, in backend_mod
    locals().update(vars(importlib.import_module(backend_name)))
  File "C:\ProgramData\Anaconda3\envs\mne\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\backend_qt5agg.py", line 11, in &lt;module&gt;
    from .backend_qt5 import (
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\backend_qt5.py", line 16, in &lt;module&gt;
    import matplotlib.backends.qt_editor.figureoptions as figureoptions
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_editor\figureoptions.py", line 11, in &lt;module&gt;
    from matplotlib.backends.qt_compat import QtGui
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_compat.py", line 172, in &lt;module&gt;
    _setup()
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_compat.py", line 132, in _setup_pyqt4
    _setup_pyqt4_internal(api=2)
  File "C:\ProgramData\Anaconda3\envs\mne\lib\site-packages\matplotlib\backends\qt_compat.py", line 115, in _setup_pyqt4_internal
    sip.setapi(_sip_api, api)
AttributeError: module 'sip' has no attribute 'setapi'
</code></pre></div>
<p dir="auto"><strong>Matplotlib version</strong></p>

<ul dir="auto">
<li>Operating system: Windows 10</li>
<li>Matplotlib version (<code class="notranslate">import matplotlib; print(matplotlib.__version__)</code>): 3.3.4</li>
<li>Matplotlib backend (<code class="notranslate">print(matplotlib.get_backend())</code>): not readable, this also produces the same error as above</li>
<li>Python version: 3.8.6</li>
<li>Jupyter version (if applicable): 1.0.0</li>
<li>Other libraries:</li>
</ul>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="# Name                    Version                   Build  Channel
appdirs                   1.4.4              pyh9f0ad1d_0    conda-forge
apptools                  5.1.0              pyh44b312d_0    conda-forge
argon2-cffi               20.1.0           py38h294d835_2    conda-forge
async_generator           1.10                       py_0    conda-forge
attrs                     20.3.0             pyhd3deb0d_0    conda-forge
backcall                  0.2.0              pyh9f0ad1d_0    conda-forge
backports                 1.0                        py_2    conda-forge
backports.functools_lru_cache 1.6.1                      py_0    conda-forge
bleach                    3.3.0              pyh44b312d_0    conda-forge
blosc                     1.21.0               h0e60522_0    conda-forge
brotli                    1.0.9                h0e60522_4    conda-forge
brotlipy                  0.7.0           py38h294d835_1001    conda-forge
bzip2                     1.0.8                h8ffe710_4    conda-forge
ca-certificates           2021.1.19            haa95532_0
cached-property           1.5.1                      py_0    conda-forge
certifi                   2020.12.5        py38haa95532_0
cffi                      1.14.4           py38hd8c33c5_1    conda-forge
cftime                    1.4.1            py38h347fdf6_0    conda-forge
chardet                   4.0.0            py38haa244fe_1    conda-forge
charls                    2.2.0                h39d44d4_0    conda-forge
cloudpickle               1.6.0                      py_0    conda-forge
colorama                  0.4.4              pyh9f0ad1d_0    conda-forge
configobj                 5.0.6                      py_0    conda-forge
cryptography              3.3.1            py38hd8c33c5_1    conda-forge
curl                      7.71.1               h4b64cdc_8    conda-forge
cvxpy                     1.1.7            py38haa244fe_1    conda-forge
cvxpy-base                1.1.7            py38h4c96930_1    conda-forge
cycler                    0.10.0                     py_2    conda-forge
cytoolz                   0.11.0           py38h294d835_3    conda-forge
dask-core                 2021.1.1           pyhd8ed1ab_0    conda-forge
decorator                 4.4.2                      py_0    conda-forge
defusedxml                0.6.0                      py_0    conda-forge
dipy                      1.3.0            py38hbc2243c_1    conda-forge
double-conversion         3.1.5                h6538335_2    conda-forge
ecos                      2.0.7.post1      py38h347fdf6_4    conda-forge
eigen                     3.3.9                h2d74725_1    conda-forge
entrypoints               0.3             pyhd8ed1ab_1003    conda-forge
envisage                  4.9.2              pyh9f0ad1d_1    conda-forge
expat                     2.2.10               h39d44d4_0    conda-forge
ffmpeg                    4.3.1                ha925a31_0    conda-forge
freetype                  2.10.4               h546665d_1    conda-forge
giflib                    5.2.1                h8d14728_2    conda-forge
gl2ps                     1.4.2                h0597ee9_0    conda-forge
glew                      2.1.0                h39d44d4_2    conda-forge
h5py                      3.1.0           nompi_py38h022eade_100    conda-forge
hdf4                      4.2.13            h0e5069d_1004    conda-forge
hdf5                      1.10.6          nompi_h5268f04_1114    conda-forge
icu                       68.1                 h0e60522_0    conda-forge
idna                      2.10               pyh9f0ad1d_0    conda-forge
imagecodecs               2021.1.11        py38h1ceb79b_1    conda-forge
imageio                   2.9.0                      py_0    conda-forge
imageio-ffmpeg            0.4.3              pyhd8ed1ab_0    conda-forge
importlib-metadata        3.4.0            py38haa244fe_0    conda-forge
importlib_metadata        3.4.0                hd8ed1ab_0    conda-forge
intel-openmp              2020.3             h57928b3_311    conda-forge
ipykernel                 5.3.4            py38h5ca1d4c_0
ipython                   7.20.0           py38hc5df569_1    conda-forge
ipython_genutils          0.2.0                      py_1    conda-forge
ipywidgets                7.6.3              pyhd3deb0d_0    conda-forge
jedi                      0.18.0           py38haa244fe_2    conda-forge
jinja2                    2.11.3             pyh44b312d_0    conda-forge
joblib                    1.0.0              pyhd8ed1ab_0    conda-forge
jpeg                      9d                   h8ffe710_0    conda-forge
jsoncpp                   1.9.4                h2d74725_1    conda-forge
jsonschema                3.2.0                      py_2    conda-forge
jupyter                   1.0.0            py38haa244fe_6    conda-forge
jupyter_client            6.1.11             pyhd8ed1ab_1    conda-forge
jupyter_console           6.2.0                      py_0    conda-forge
jupyter_core              4.7.1            py38haa244fe_0    conda-forge
jupyterlab_pygments       0.1.2              pyh9f0ad1d_0    conda-forge
jupyterlab_widgets        1.0.0              pyhd8ed1ab_1    conda-forge
jxrlib                    1.1                  h8ffe710_2    conda-forge
kiwisolver                1.3.1            py38hbd9d945_1    conda-forge
krb5                      1.17.2               hbae68bd_0    conda-forge
lcms2                     2.11                 h6a326e1_1    conda-forge
lerc                      2.2.1                h0e60522_0    conda-forge
libaec                    1.0.4                h39d44d4_1    conda-forge
libblas                   3.9.0                     7_mkl    conda-forge
libcblas                  3.9.0                     7_mkl    conda-forge
libclang                  11.0.1          default_h5c34c98_1    conda-forge
libcurl                   7.71.1               h4b64cdc_8    conda-forge
libdeflate                1.7                  h8ffe710_5    conda-forge
libflang                  5.0.0           h6538335_20180525    conda-forge
libiconv                  1.16                 he774522_0    conda-forge
liblapack                 3.9.0                     7_mkl    conda-forge
libnetcdf                 4.7.4           nompi_h3a9aa94_107    conda-forge
libogg                    1.3.4                h8ffe710_1    conda-forge
libpng                    1.6.37               h1d00b33_2    conda-forge
libsodium                 1.0.18               h8d14728_1    conda-forge
libssh2                   1.9.0                hb06d900_5    conda-forge
libtheora                 1.1.1             h62dcd97_1004    conda-forge
libtiff                   4.2.0                hc10be44_0    conda-forge
libwebp-base              1.2.0                h8ffe710_0    conda-forge
libxml2                   2.9.10               hf5bbc77_3    conda-forge
libzopfli                 1.0.3                h0e60522_0    conda-forge
llvm-meta                 5.0.0                         0    conda-forge
llvmlite                  0.35.0           py38h57a6900_1    conda-forge
loguru                    0.5.3            py38h32f6830_2    conda-forge
lz4-c                     1.9.3                h8ffe710_0    conda-forge
m2w64-gcc-libgfortran     5.3.0                         6    conda-forge
m2w64-gcc-libs            5.3.0                         7    conda-forge
m2w64-gcc-libs-core       5.3.0                         7    conda-forge
m2w64-gmp                 6.1.0                         2    conda-forge
m2w64-libwinpthread-git   5.0.0.4634.697f757               2    conda-forge
markupsafe                1.1.1            py38h294d835_3    conda-forge
matplotlib                3.3.4            py38haa244fe_0    conda-forge
matplotlib-base           3.3.4            py38h34ddff4_0    conda-forge
mayavi                    4.7.2            py38h8d3ad35_4    conda-forge
meshio                    4.3.8              pyhd8ed1ab_0    conda-forge
mffpy                     0.6.0              pyhd8ed1ab_0    conda-forge
mistune                   0.8.4           py38h294d835_1003    conda-forge
mkl                       2020.4             hb70f87d_311    conda-forge
mne                       0.22.0             pyhd8ed1ab_2    conda-forge
mock                      4.0.3            py38haa244fe_1    conda-forge
msys2-conda-epoch         20160418                      1    conda-forge
nbclient                  0.5.1                      py_0    conda-forge
nbconvert                 6.0.7            py38haa244fe_3    conda-forge
nbformat                  5.1.2              pyhd8ed1ab_1    conda-forge
nest-asyncio              1.4.3              pyhd8ed1ab_0    conda-forge
netcdf4                   1.5.5.1         nompi_py38h5338a22_101    conda-forge
networkx                  2.5                        py_0    conda-forge
nibabel                   3.2.1              pyhd8ed1ab_0    conda-forge
nilearn                   0.7.0              pyhd8ed1ab_0    conda-forge
notebook                  6.2.0            py38haa244fe_0    conda-forge
numba                     0.52.0           py38h4c96930_0    conda-forge
numexpr                   2.7.2            py38h4c96930_0    conda-forge
numpy                     1.20.0           py38h0cc643e_0    conda-forge
olefile                   0.46               pyh9f0ad1d_1    conda-forge
openjpeg                  2.4.0                h48faf41_0    conda-forge
openmp                    5.0.0                    vc14_1    conda-forge
openssl                   1.1.1i               h2bbff1b_0
osqp                      0.6.2            py38h4c96930_1    conda-forge
packaging                 20.8               pyhd3deb0d_0    conda-forge
pandas                    1.2.1            py38h4c96930_0    conda-forge
pandoc                    2.11.4               h8ffe710_0    conda-forge
pandocfilters             1.4.2                      py_1    conda-forge
parso                     0.8.1              pyhd8ed1ab_0    conda-forge
patsy                     0.5.1                      py_0    conda-forge
pickleshare               0.7.5                   py_1003    conda-forge
pillow                    8.1.0            py38hf7ce48b_1    conda-forge
pip                       21.0.1             pyhd8ed1ab_0    conda-forge
pooch                     1.3.0              pyhd8ed1ab_0    conda-forge
proj                      7.2.0                h3e70539_1    conda-forge
prometheus_client         0.9.0              pyhd3deb0d_0    conda-forge
prompt-toolkit            3.0.14             pyha770c72_0    conda-forge
prompt_toolkit            3.0.14               hd8ed1ab_0    conda-forge
psutil                    5.8.0            py38h294d835_1    conda-forge
pugixml                   1.11.4               h0e60522_0    conda-forge
pycparser                 2.20               pyh9f0ad1d_2    conda-forge
pydicom                   2.1.2              pyhd3deb0d_0    conda-forge
pyedflib                  0.1.20                   pypi_0    pypi
pyface                    7.1.0              pyh9f0ad1d_0    conda-forge
pygments                  2.7.4              pyhd8ed1ab_0    conda-forge
pyopenssl                 20.0.1             pyhd8ed1ab_0    conda-forge
pyparsing                 2.4.7              pyh9f0ad1d_0    conda-forge
pyqt                      5.12.3           py38haa244fe_7    conda-forge
pyqt-impl                 5.12.3           py38h885f38d_7    conda-forge
pyqt5-sip                 4.19.18          py38h885f38d_7    conda-forge
pyqtchart                 5.12             py38h885f38d_7    conda-forge
pyqtwebengine             5.12.1           py38h885f38d_7    conda-forge
pyreadline                2.1             py38haa244fe_1003    conda-forge
pyrsistent                0.17.3           py38h294d835_2    conda-forge
pysocks                   1.7.1            py38haa244fe_3    conda-forge
pysurfer                  0.11.0                     py_0    conda-forge
pytables                  3.6.1            py38h153c448_3    conda-forge
python                    3.8.6           h7840368_5_cpython    conda-forge
python-dateutil           2.8.1                      py_0    conda-forge
python-picard             0.4                pyh5ca1d4c_1    conda-forge
python_abi                3.8                      1_cp38    conda-forge
pytz                      2021.1             pyhd8ed1ab_0    conda-forge
pyvista                   0.27.4             pyhd8ed1ab_0    conda-forge
pyvistaqt                 0.3.0              pyhd8ed1ab_0    conda-forge
pywavelets                1.1.1            py38h347fdf6_3    conda-forge
pywin32                   300              py38h294d835_0    conda-forge
pywinpty                  0.5.7            py38h32f6830_1    conda-forge
pyyaml                    5.4.1            py38h294d835_0    conda-forge
pyzmq                     22.0.1           py38h7a0e47e_0    conda-forge
qdldl-python              0.1.5            py38h4c96930_0    conda-forge
qt                        5.12.9               h5909a2a_3    conda-forge
qtconsole                 5.0.2              pyhd8ed1ab_0    conda-forge
qtpy                      1.9.0                      py_0    conda-forge
requests                  2.25.1             pyhd3deb0d_0    conda-forge
scikit-image              0.18.1           py38h4c96930_0    conda-forge
scikit-learn              0.24.1           py38ha09990b_0    conda-forge
scipy                     1.5.2                    pypi_0    pypi
scooby                    0.5.6              pyh9f0ad1d_0    conda-forge
scs                       2.1.2            py38h7465cd0_2    conda-forge
send2trash                1.5.0                      py_0    conda-forge
setuptools                49.6.0           py38haa244fe_3    conda-forge
six                       1.15.0             pyh9f0ad1d_0    conda-forge
snappy                    1.1.8                ha925a31_3    conda-forge
spyder-kernels            1.10.1           py38haa244fe_1    conda-forge
sqlite                    3.34.0               h8ffe710_0    conda-forge
statsmodels               0.12.2           py38h347fdf6_0    conda-forge
tbb                       2020.2               h2d74725_3    conda-forge
tbb-devel                 2020.2               h2d74725_3    conda-forge
terminado                 0.9.2            py38haa244fe_0    conda-forge
testpath                  0.4.4                      py_0    conda-forge
threadpoolctl             2.1.0              pyh5ca1d4c_0    conda-forge
tifffile                  2021.2.1           pyhd8ed1ab_0    conda-forge
tk                        8.6.10               h8ffe710_1    conda-forge
toolz                     0.11.1                     py_0    conda-forge
tornado                   6.1              py38h294d835_1    conda-forge
tqdm                      4.56.0             pyhd8ed1ab_0    conda-forge
traitlets                 5.0.5                      py_0    conda-forge
traits                    6.2.0            py38h294d835_0    conda-forge
traitsui                  7.1.0              pyh9f0ad1d_0    conda-forge
urllib3                   1.26.3             pyhd8ed1ab_0    conda-forge
utfcpp                    3.1.2                         0    conda-forge
vc                        14.2                 hb210afc_2    conda-forge
vs2015_runtime            14.28.29325          h5e1d092_0    conda-forge
vtk                       9.0.1           no_osmesa_py38h3499093_104    conda-forge
wcwidth                   0.2.5              pyh9f0ad1d_2    conda-forge
webencodings              0.5.1                      py_1    conda-forge
wheel                     0.36.2             pyhd3deb0d_0    conda-forge
widgetsnbextension        3.5.1            py38haa244fe_4    conda-forge
win32_setctime            1.0.3                      py_0    conda-forge
win_inet_pton             1.1.0            py38haa244fe_2    conda-forge
wincertstore              0.2             py38haa244fe_1006    conda-forge
winpty                    0.4.3                         4    conda-forge
xlrd                      2.0.1              pyhd8ed1ab_3    conda-forge
xz                        5.2.5                h62dcd97_1    conda-forge
yaml                      0.2.5                he774522_0    conda-forge
zeromq                    4.3.3                h0e60522_3    conda-forge
zfp                       0.5.5                h0e60522_4    conda-forge
zipp                      3.4.0                      py_0    conda-forge
zlib                      1.2.11            h62dcd97_1010    conda-forge
zstd                      1.4.8                h4e2f164_1    conda-forge"><pre class="notranslate"><code class="notranslate"># Name                    Version                   Build  Channel
appdirs                   1.4.4              pyh9f0ad1d_0    conda-forge
apptools                  5.1.0              pyh44b312d_0    conda-forge
argon2-cffi               20.1.0           py38h294d835_2    conda-forge
async_generator           1.10                       py_0    conda-forge
attrs                     20.3.0             pyhd3deb0d_0    conda-forge
backcall                  0.2.0              pyh9f0ad1d_0    conda-forge
backports                 1.0                        py_2    conda-forge
backports.functools_lru_cache 1.6.1                      py_0    conda-forge
bleach                    3.3.0              pyh44b312d_0    conda-forge
blosc                     1.21.0               h0e60522_0    conda-forge
brotli                    1.0.9                h0e60522_4    conda-forge
brotlipy                  0.7.0           py38h294d835_1001    conda-forge
bzip2                     1.0.8                h8ffe710_4    conda-forge
ca-certificates           2021.1.19            haa95532_0
cached-property           1.5.1                      py_0    conda-forge
certifi                   2020.12.5        py38haa95532_0
cffi                      1.14.4           py38hd8c33c5_1    conda-forge
cftime                    1.4.1            py38h347fdf6_0    conda-forge
chardet                   4.0.0            py38haa244fe_1    conda-forge
charls                    2.2.0                h39d44d4_0    conda-forge
cloudpickle               1.6.0                      py_0    conda-forge
colorama                  0.4.4              pyh9f0ad1d_0    conda-forge
configobj                 5.0.6                      py_0    conda-forge
cryptography              3.3.1            py38hd8c33c5_1    conda-forge
curl                      7.71.1               h4b64cdc_8    conda-forge
cvxpy                     1.1.7            py38haa244fe_1    conda-forge
cvxpy-base                1.1.7            py38h4c96930_1    conda-forge
cycler                    0.10.0                     py_2    conda-forge
cytoolz                   0.11.0           py38h294d835_3    conda-forge
dask-core                 2021.1.1           pyhd8ed1ab_0    conda-forge
decorator                 4.4.2                      py_0    conda-forge
defusedxml                0.6.0                      py_0    conda-forge
dipy                      1.3.0            py38hbc2243c_1    conda-forge
double-conversion         3.1.5                h6538335_2    conda-forge
ecos                      2.0.7.post1      py38h347fdf6_4    conda-forge
eigen                     3.3.9                h2d74725_1    conda-forge
entrypoints               0.3             pyhd8ed1ab_1003    conda-forge
envisage                  4.9.2              pyh9f0ad1d_1    conda-forge
expat                     2.2.10               h39d44d4_0    conda-forge
ffmpeg                    4.3.1                ha925a31_0    conda-forge
freetype                  2.10.4               h546665d_1    conda-forge
giflib                    5.2.1                h8d14728_2    conda-forge
gl2ps                     1.4.2                h0597ee9_0    conda-forge
glew                      2.1.0                h39d44d4_2    conda-forge
h5py                      3.1.0           nompi_py38h022eade_100    conda-forge
hdf4                      4.2.13            h0e5069d_1004    conda-forge
hdf5                      1.10.6          nompi_h5268f04_1114    conda-forge
icu                       68.1                 h0e60522_0    conda-forge
idna                      2.10               pyh9f0ad1d_0    conda-forge
imagecodecs               2021.1.11        py38h1ceb79b_1    conda-forge
imageio                   2.9.0                      py_0    conda-forge
imageio-ffmpeg            0.4.3              pyhd8ed1ab_0    conda-forge
importlib-metadata        3.4.0            py38haa244fe_0    conda-forge
importlib_metadata        3.4.0                hd8ed1ab_0    conda-forge
intel-openmp              2020.3             h57928b3_311    conda-forge
ipykernel                 5.3.4            py38h5ca1d4c_0
ipython                   7.20.0           py38hc5df569_1    conda-forge
ipython_genutils          0.2.0                      py_1    conda-forge
ipywidgets                7.6.3              pyhd3deb0d_0    conda-forge
jedi                      0.18.0           py38haa244fe_2    conda-forge
jinja2                    2.11.3             pyh44b312d_0    conda-forge
joblib                    1.0.0              pyhd8ed1ab_0    conda-forge
jpeg                      9d                   h8ffe710_0    conda-forge
jsoncpp                   1.9.4                h2d74725_1    conda-forge
jsonschema                3.2.0                      py_2    conda-forge
jupyter                   1.0.0            py38haa244fe_6    conda-forge
jupyter_client            6.1.11             pyhd8ed1ab_1    conda-forge
jupyter_console           6.2.0                      py_0    conda-forge
jupyter_core              4.7.1            py38haa244fe_0    conda-forge
jupyterlab_pygments       0.1.2              pyh9f0ad1d_0    conda-forge
jupyterlab_widgets        1.0.0              pyhd8ed1ab_1    conda-forge
jxrlib                    1.1                  h8ffe710_2    conda-forge
kiwisolver                1.3.1            py38hbd9d945_1    conda-forge
krb5                      1.17.2               hbae68bd_0    conda-forge
lcms2                     2.11                 h6a326e1_1    conda-forge
lerc                      2.2.1                h0e60522_0    conda-forge
libaec                    1.0.4                h39d44d4_1    conda-forge
libblas                   3.9.0                     7_mkl    conda-forge
libcblas                  3.9.0                     7_mkl    conda-forge
libclang                  11.0.1          default_h5c34c98_1    conda-forge
libcurl                   7.71.1               h4b64cdc_8    conda-forge
libdeflate                1.7                  h8ffe710_5    conda-forge
libflang                  5.0.0           h6538335_20180525    conda-forge
libiconv                  1.16                 he774522_0    conda-forge
liblapack                 3.9.0                     7_mkl    conda-forge
libnetcdf                 4.7.4           nompi_h3a9aa94_107    conda-forge
libogg                    1.3.4                h8ffe710_1    conda-forge
libpng                    1.6.37               h1d00b33_2    conda-forge
libsodium                 1.0.18               h8d14728_1    conda-forge
libssh2                   1.9.0                hb06d900_5    conda-forge
libtheora                 1.1.1             h62dcd97_1004    conda-forge
libtiff                   4.2.0                hc10be44_0    conda-forge
libwebp-base              1.2.0                h8ffe710_0    conda-forge
libxml2                   2.9.10               hf5bbc77_3    conda-forge
libzopfli                 1.0.3                h0e60522_0    conda-forge
llvm-meta                 5.0.0                         0    conda-forge
llvmlite                  0.35.0           py38h57a6900_1    conda-forge
loguru                    0.5.3            py38h32f6830_2    conda-forge
lz4-c                     1.9.3                h8ffe710_0    conda-forge
m2w64-gcc-libgfortran     5.3.0                         6    conda-forge
m2w64-gcc-libs            5.3.0                         7    conda-forge
m2w64-gcc-libs-core       5.3.0                         7    conda-forge
m2w64-gmp                 6.1.0                         2    conda-forge
m2w64-libwinpthread-git   5.0.0.4634.697f757               2    conda-forge
markupsafe                1.1.1            py38h294d835_3    conda-forge
matplotlib                3.3.4            py38haa244fe_0    conda-forge
matplotlib-base           3.3.4            py38h34ddff4_0    conda-forge
mayavi                    4.7.2            py38h8d3ad35_4    conda-forge
meshio                    4.3.8              pyhd8ed1ab_0    conda-forge
mffpy                     0.6.0              pyhd8ed1ab_0    conda-forge
mistune                   0.8.4           py38h294d835_1003    conda-forge
mkl                       2020.4             hb70f87d_311    conda-forge
mne                       0.22.0             pyhd8ed1ab_2    conda-forge
mock                      4.0.3            py38haa244fe_1    conda-forge
msys2-conda-epoch         20160418                      1    conda-forge
nbclient                  0.5.1                      py_0    conda-forge
nbconvert                 6.0.7            py38haa244fe_3    conda-forge
nbformat                  5.1.2              pyhd8ed1ab_1    conda-forge
nest-asyncio              1.4.3              pyhd8ed1ab_0    conda-forge
netcdf4                   1.5.5.1         nompi_py38h5338a22_101    conda-forge
networkx                  2.5                        py_0    conda-forge
nibabel                   3.2.1              pyhd8ed1ab_0    conda-forge
nilearn                   0.7.0              pyhd8ed1ab_0    conda-forge
notebook                  6.2.0            py38haa244fe_0    conda-forge
numba                     0.52.0           py38h4c96930_0    conda-forge
numexpr                   2.7.2            py38h4c96930_0    conda-forge
numpy                     1.20.0           py38h0cc643e_0    conda-forge
olefile                   0.46               pyh9f0ad1d_1    conda-forge
openjpeg                  2.4.0                h48faf41_0    conda-forge
openmp                    5.0.0                    vc14_1    conda-forge
openssl                   1.1.1i               h2bbff1b_0
osqp                      0.6.2            py38h4c96930_1    conda-forge
packaging                 20.8               pyhd3deb0d_0    conda-forge
pandas                    1.2.1            py38h4c96930_0    conda-forge
pandoc                    2.11.4               h8ffe710_0    conda-forge
pandocfilters             1.4.2                      py_1    conda-forge
parso                     0.8.1              pyhd8ed1ab_0    conda-forge
patsy                     0.5.1                      py_0    conda-forge
pickleshare               0.7.5                   py_1003    conda-forge
pillow                    8.1.0            py38hf7ce48b_1    conda-forge
pip                       21.0.1             pyhd8ed1ab_0    conda-forge
pooch                     1.3.0              pyhd8ed1ab_0    conda-forge
proj                      7.2.0                h3e70539_1    conda-forge
prometheus_client         0.9.0              pyhd3deb0d_0    conda-forge
prompt-toolkit            3.0.14             pyha770c72_0    conda-forge
prompt_toolkit            3.0.14               hd8ed1ab_0    conda-forge
psutil                    5.8.0            py38h294d835_1    conda-forge
pugixml                   1.11.4               h0e60522_0    conda-forge
pycparser                 2.20               pyh9f0ad1d_2    conda-forge
pydicom                   2.1.2              pyhd3deb0d_0    conda-forge
pyedflib                  0.1.20                   pypi_0    pypi
pyface                    7.1.0              pyh9f0ad1d_0    conda-forge
pygments                  2.7.4              pyhd8ed1ab_0    conda-forge
pyopenssl                 20.0.1             pyhd8ed1ab_0    conda-forge
pyparsing                 2.4.7              pyh9f0ad1d_0    conda-forge
pyqt                      5.12.3           py38haa244fe_7    conda-forge
pyqt-impl                 5.12.3           py38h885f38d_7    conda-forge
pyqt5-sip                 4.19.18          py38h885f38d_7    conda-forge
pyqtchart                 5.12             py38h885f38d_7    conda-forge
pyqtwebengine             5.12.1           py38h885f38d_7    conda-forge
pyreadline                2.1             py38haa244fe_1003    conda-forge
pyrsistent                0.17.3           py38h294d835_2    conda-forge
pysocks                   1.7.1            py38haa244fe_3    conda-forge
pysurfer                  0.11.0                     py_0    conda-forge
pytables                  3.6.1            py38h153c448_3    conda-forge
python                    3.8.6           h7840368_5_cpython    conda-forge
python-dateutil           2.8.1                      py_0    conda-forge
python-picard             0.4                pyh5ca1d4c_1    conda-forge
python_abi                3.8                      1_cp38    conda-forge
pytz                      2021.1             pyhd8ed1ab_0    conda-forge
pyvista                   0.27.4             pyhd8ed1ab_0    conda-forge
pyvistaqt                 0.3.0              pyhd8ed1ab_0    conda-forge
pywavelets                1.1.1            py38h347fdf6_3    conda-forge
pywin32                   300              py38h294d835_0    conda-forge
pywinpty                  0.5.7            py38h32f6830_1    conda-forge
pyyaml                    5.4.1            py38h294d835_0    conda-forge
pyzmq                     22.0.1           py38h7a0e47e_0    conda-forge
qdldl-python              0.1.5            py38h4c96930_0    conda-forge
qt                        5.12.9               h5909a2a_3    conda-forge
qtconsole                 5.0.2              pyhd8ed1ab_0    conda-forge
qtpy                      1.9.0                      py_0    conda-forge
requests                  2.25.1             pyhd3deb0d_0    conda-forge
scikit-image              0.18.1           py38h4c96930_0    conda-forge
scikit-learn              0.24.1           py38ha09990b_0    conda-forge
scipy                     1.5.2                    pypi_0    pypi
scooby                    0.5.6              pyh9f0ad1d_0    conda-forge
scs                       2.1.2            py38h7465cd0_2    conda-forge
send2trash                1.5.0                      py_0    conda-forge
setuptools                49.6.0           py38haa244fe_3    conda-forge
six                       1.15.0             pyh9f0ad1d_0    conda-forge
snappy                    1.1.8                ha925a31_3    conda-forge
spyder-kernels            1.10.1           py38haa244fe_1    conda-forge
sqlite                    3.34.0               h8ffe710_0    conda-forge
statsmodels               0.12.2           py38h347fdf6_0    conda-forge
tbb                       2020.2               h2d74725_3    conda-forge
tbb-devel                 2020.2               h2d74725_3    conda-forge
terminado                 0.9.2            py38haa244fe_0    conda-forge
testpath                  0.4.4                      py_0    conda-forge
threadpoolctl             2.1.0              pyh5ca1d4c_0    conda-forge
tifffile                  2021.2.1           pyhd8ed1ab_0    conda-forge
tk                        8.6.10               h8ffe710_1    conda-forge
toolz                     0.11.1                     py_0    conda-forge
tornado                   6.1              py38h294d835_1    conda-forge
tqdm                      4.56.0             pyhd8ed1ab_0    conda-forge
traitlets                 5.0.5                      py_0    conda-forge
traits                    6.2.0            py38h294d835_0    conda-forge
traitsui                  7.1.0              pyh9f0ad1d_0    conda-forge
urllib3                   1.26.3             pyhd8ed1ab_0    conda-forge
utfcpp                    3.1.2                         0    conda-forge
vc                        14.2                 hb210afc_2    conda-forge
vs2015_runtime            14.28.29325          h5e1d092_0    conda-forge
vtk                       9.0.1           no_osmesa_py38h3499093_104    conda-forge
wcwidth                   0.2.5              pyh9f0ad1d_2    conda-forge
webencodings              0.5.1                      py_1    conda-forge
wheel                     0.36.2             pyhd3deb0d_0    conda-forge
widgetsnbextension        3.5.1            py38haa244fe_4    conda-forge
win32_setctime            1.0.3                      py_0    conda-forge
win_inet_pton             1.1.0            py38haa244fe_2    conda-forge
wincertstore              0.2             py38haa244fe_1006    conda-forge
winpty                    0.4.3                         4    conda-forge
xlrd                      2.0.1              pyhd8ed1ab_3    conda-forge
xz                        5.2.5                h62dcd97_1    conda-forge
yaml                      0.2.5                he774522_0    conda-forge
zeromq                    4.3.3                h0e60522_3    conda-forge
zfp                       0.5.5                h0e60522_4    conda-forge
zipp                      3.4.0                      py_0    conda-forge
zlib                      1.2.11            h62dcd97_1010    conda-forge
zstd                      1.4.8                h4e2f164_1    conda-forge
</code></pre></div>
<h3 dir="auto">Bug report</h3>
<p dir="auto"><strong>Bug summary</strong></p>
<p dir="auto">Playing around with getting information from the child artists in a legend, I ran into a strange issue where some operations disrupt the Jupyter Notebook inline figure display.</p>
<p dir="auto"><strong>Code for reproduction</strong></p>
<p dir="auto">This seems to be a minimal example:</p>
<div class="highlight highlight-source-python notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="import matplotlib as mpl
import matplotlib.pyplot as plt

f, ax = plt.subplots()
leg = ax.legend([plt.Line2D([], [])], [&quot;a line&quot;], loc=&quot;lower left&quot;)
hpackers = leg.findobj(mpl.offsetbox.VPacker)[0].get_children()
for hpack in hpackers:
    draw_area, text_area = hpack.get_children()
    handles = draw_area.get_children()
    assert any(artist.get_visible() for artist in handles)"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s1">matplotlib</span> <span class="pl-k">as</span> <span class="pl-s1">mpl</span>
<span class="pl-k">import</span> <span class="pl-s1">matplotlib</span>.<span class="pl-s1">pyplot</span> <span class="pl-k">as</span> <span class="pl-s1">plt</span>

<span class="pl-s1">f</span>, <span class="pl-s1">ax</span> <span class="pl-c1">=</span> <span class="pl-s1">plt</span>.<span class="pl-en">subplots</span>()
<span class="pl-s1">leg</span> <span class="pl-c1">=</span> <span class="pl-s1">ax</span>.<span class="pl-en">legend</span>([<span class="pl-s1">plt</span>.<span class="pl-v">Line2D</span>([], [])], [<span class="pl-s">"a line"</span>], <span class="pl-s1">loc</span><span class="pl-c1">=</span><span class="pl-s">"lower left"</span>)
<span class="pl-s1">hpackers</span> <span class="pl-c1">=</span> <span class="pl-s1">leg</span>.<span class="pl-en">findobj</span>(<span class="pl-s1">mpl</span>.<span class="pl-s1">offsetbox</span>.<span class="pl-v">VPacker</span>)[<span class="pl-c1">0</span>].<span class="pl-en">get_children</span>()
<span class="pl-k">for</span> <span class="pl-s1">hpack</span> <span class="pl-c1">in</span> <span class="pl-s1">hpackers</span>:
    <span class="pl-s1">draw_area</span>, <span class="pl-s1">text_area</span> <span class="pl-c1">=</span> <span class="pl-s1">hpack</span>.<span class="pl-en">get_children</span>()
    <span class="pl-s1">handles</span> <span class="pl-c1">=</span> <span class="pl-s1">draw_area</span>.<span class="pl-en">get_children</span>()
    <span class="pl-k">assert</span> <span class="pl-en">any</span>(<span class="pl-s1">artist</span>.<span class="pl-en">get_visible</span>() <span class="pl-k">for</span> <span class="pl-s1">artist</span> <span class="pl-c1">in</span> <span class="pl-s1">handles</span>)</pre></div>
<p dir="auto"><strong>Actual outcome</strong></p>
<p dir="auto">No error, but also no figure. If you then execute a different cell, the figure shows up there. If you execute the cell several times, the figures queue up, and then they're all displayed in the output are of the cell you execute.</p>
<p dir="auto"><strong>Expected outcome</strong></p>
<p dir="auto">Normal behavior.</p>
<p dir="auto"><strong>Matplotlib version</strong></p>

<ul dir="auto">
<li>Operating system: MacOS</li>
<li>Matplotlib version: 3.3.0</li>
<li>Matplotlib backend (<code class="notranslate">print(matplotlib.get_backend())</code>): pylab inline</li>
<li>Python version: 3.8</li>
<li>Jupyter version (if applicable): IPython version 7.15.0</li>
</ul>