Spyder uninstalls and rollsback from 4.0.1 to the version 3.x.x shipped with anaconda by itself.

[gauthamrdy]

I installed anaconda and updated spyder to version 4.0.1 Once I close anaconda and open it again, I see spyder rolled back to the original version it came with.

Also, after updating to the latest version of spyder, I found some modules like NumPy, pandas and matplotlib not available showing module not found an error. I have no idea how to fix this. I tried to reset spyder settings and found no solace. Any assistance is appreciated. Thanks

Versions

• Spyder version: 4.0.1
• Python version: 3.8.1 64-bit
• Qt version: 5.9.7
• PyQt version: 5.9.2
• Operating System name/version: Windows 10

Dependencies

atomicwrites >=1.2.0         :  1.3.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
cloudpickle >=0.5.0          :  1.3.0 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
IPython >=4.0                :  7.12.0 (OK)
jedi =0.14.1                 :  0.14.1 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
numpydoc >=0.6.0             :  0.9.2 (OK)
pexpect >=4.4.0              :  4.8.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
psutil >=0.3                 :  5.6.7 (OK)
pygments >=2.0               :  2.5.2 (OK)
pylint >=0.25                :  2.4.4 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.7 (OK)
zmq >=17                     :  18.1.1 (OK)
qdarkstyle >=2.7             :  2.8 (OK)
qtawesome >=0.5.7            :  0.6.1 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
rtree >=0.8.3                :  0.9.3 (OK)
sphinx >=0.6.6               :  2.4.0 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
watchdog                     :  None (OK)
cython >=0.21                :  None (NOK)
matplotlib >=2.0.0           :  None (NOK)
numpy >=1.7                  :  None (NOK)
pandas >=0.13.1              :  None (NOK)
scipy >=0.17.0               :  None (NOK)
sympy >=0.7.3                :  None (NOK)

[goanpeca]

@gautham949 please open the Anaconda Prompt, activate your environment (if you installed spyder on a separate environment from base) and provide the information of

conda info

and

conda list

[remisalmon]

Same issue using conda update --all on Linux:

The environment is inconsistent, please check the package plan carefully
The following packages are causing the inconsistency:

  - defaults/linux-64::spyder==4.0.1=py37_0
done

## Package Plan ##

  environment location: XXX


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    jedi-0.16.0                |           py37_0         761 KB
    spyder-3.3.6               |           py37_0         2.2 MB
    spyder-kernels-0.5.2       |           py37_0          71 KB
    ------------------------------------------------------------
                                           Total:         3.0 MB

The following packages will be UPDATED:

  jedi                                        0.14.1-py37_0 --> 0.16.0-py37_0

The following packages will be DOWNGRADED:

  spyder                                       4.0.1-py37_0 --> 3.3.6-py37_0
  spyder-kernels                               1.8.1-py37_0 --> 0.5.2-py37_0

The inconsistency is caused by jedi being updated to 0.16.0 in the anaconda repo.

[goanpeca]

@ccordoba12 might this be related to the hotfixes?

[ccordoba12]

Nop, the problem is Spyder 3 doesn't have an upper requirement on Jedi whereas Spyder 4 does. I think there are two solutions:

1. Update Spyder 4 to support Jedi 0.16 (hard)
2. Hotfix Spyder 3.3.6 to put the same requirement on Jedi as Spyder 4.

[gauthamrdy]

I have the following from the commands

(base) C:\Users\Gautham>conda env list
# conda environments:
#
base                  *  C:\ProgramData\Anaconda3
rstudio                  C:\Users\Gautham\.conda\envs\rstudio
rstudio-1.1.456          C:\Users\Gautham\.conda\envs\rstudio-1.1.456
spyder                   C:\Users\Gautham\.conda\envs\spyder
spyder-4.0.1             C:\Users\Gautham\.conda\envs\spyder-4.0.1


(base) C:\Users\Gautham>conda info

     active environment : base
    active env location : C:\ProgramData\Anaconda3
            shell level : 1
       user config file : C:\Users\Gautham\.condarc
 populated config files : C:\Users\Gautham\.condarc
          conda version : 4.7.12
    conda-build version : 3.18.9
         python version : 3.7.4.final.0
       virtual packages :
       base environment : C:\ProgramData\Anaconda3  (read only)
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\ProgramData\Anaconda3\pkgs
                          C:\Users\Gautham\.conda\pkgs
                          C:\Users\Gautham\AppData\Local\conda\conda\pkgs
       envs directories : C:\Users\Gautham\.conda\envs
                          C:\ProgramData\Anaconda3\envs
                          C:\Users\Gautham\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.7.12 requests/2.22.0 CPython/3.7.4 Windows/10 Windows/10.0.18362
          administrator : False
             netrc file : None
           offline mode : False


(base) C:\Users\Gautham>conda activate spyder-4.0.1

(spyder-4.0.1) C:\Users\Gautham>conda info

     active environment : spyder-4.0.1
    active env location : C:\Users\Gautham\.conda\envs\spyder-4.0.1
            shell level : 2
       user config file : C:\Users\Gautham\.condarc
 populated config files : C:\Users\Gautham\.condarc
          conda version : 4.7.12
    conda-build version : 3.18.9
         python version : 3.7.4.final.0
       virtual packages :
       base environment : C:\ProgramData\Anaconda3  (read only)
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\ProgramData\Anaconda3\pkgs
                          C:\Users\Gautham\.conda\pkgs
                          C:\Users\Gautham\AppData\Local\conda\conda\pkgs
       envs directories : C:\Users\Gautham\.conda\envs
                          C:\ProgramData\Anaconda3\envs
                          C:\Users\Gautham\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.7.12 requests/2.22.0 CPython/3.7.4 Windows/10 Windows/10.0.18362
          administrator : False
             netrc file : None
           offline mode : False


(spyder-4.0.1) C:\Users\Gautham>conda list
# packages in environment at C:\Users\Gautham\.conda\envs\spyder-4.0.1:
#
# Name                    Version                   Build  Channel
alabaster                 0.7.12                     py_0
argh                      0.26.2                   py38_0
asn1crypto                1.3.0                    py38_0
astroid                   2.3.3                    py38_0
atomicwrites              1.3.0                      py_0
attrs                     19.3.0                     py_0
autopep8                  1.4.4                      py_0
babel                     2.8.0                      py_0
backcall                  0.1.0                    py38_0
bcrypt                    3.1.7            py38he774522_0
bleach                    3.1.0                      py_0
ca-certificates           2020.1.1                      0
certifi                   2019.11.28               py38_0
cffi                      1.14.0           py38h7a1dbc1_0
chardet                   3.0.4                 py38_1003
cloudpickle               1.3.0                      py_0
colorama                  0.4.3                      py_0
cryptography              2.8              py38h7a1dbc1_0
decorator                 4.4.1                      py_0
defusedxml                0.6.0                      py_0
diff-match-patch          20181111                   py_0
docutils                  0.16                     py38_0
entrypoints               0.3                      py38_0
flake8                    3.7.9                    py38_0
future                    0.18.2                   py38_0
icu                       58.2                 ha66f8fd_1
idna                      2.8                   py38_1000
imagesize                 1.2.0                      py_0
importlib_metadata        1.5.0                    py38_0
intervaltree              3.0.2                      py_0
ipykernel                 5.1.4            py38h39e3cac_0
ipython                   7.12.0           py38h5ca1d4c_0
ipython_genutils          0.2.0                    py38_0
isort                     4.3.21                   py38_0
jedi                      0.14.1                   py38_0
jinja2                    2.11.1                     py_0
jpeg                      9b                   hb83a4c4_2
jsonschema                3.2.0                    py38_0
jupyter_client            5.3.4                    py38_0
jupyter_core              4.6.1                    py38_0
keyring                   21.1.0                   py38_0
lazy-object-proxy         1.4.3            py38he774522_0
libpng                    1.6.37               h2a8f88b_0
libsodium                 1.0.16               h9d3ae62_0
libspatialindex           1.9.3                h33f27b4_0
markupsafe                1.1.1            py38he774522_0
mccabe                    0.6.1                    py38_1
mistune                   0.8.4           py38he774522_1000
nbconvert                 5.6.1                    py38_0
nbformat                  5.0.4                      py_0
numpydoc                  0.9.2                      py_0
openssl                   1.1.1d               he774522_4
packaging                 20.1                       py_0
pandoc                    2.2.3.2                       0
pandocfilters             1.4.2                    py38_1
paramiko                  2.6.0                    py38_0
parso                     0.5.2                      py_0
pathtools                 0.1.2                      py_1
pexpect                   4.8.0                    py38_0
pickleshare               0.7.5                 py38_1000
pip                       20.0.2                   py38_1
pluggy                    0.13.1                   py38_0
prompt_toolkit            3.0.3                      py_0
psutil                    5.6.7            py38he774522_0
pycodestyle               2.5.0                    py38_0
pycparser                 2.19                       py_0
pydocstyle                4.0.1                      py_0
pyflakes                  2.1.1                    py38_0
pygments                  2.5.2                      py_0
pylint                    2.4.4                    py38_0
pynacl                    1.3.0            py38h62dcd97_0
pyopenssl                 19.1.0                   py38_0
pyparsing                 2.4.6                      py_0
pyqt                      5.9.2            py38ha925a31_4
pyrsistent                0.15.7           py38he774522_0
pysocks                   1.7.1                    py38_0
python                    3.8.1                h5fd99cc_1
python-dateutil           2.8.1                      py_0
python-jsonrpc-server     0.3.4                      py_0
python-language-server    0.31.7                   py38_0
pytz                      2019.3                     py_0
pywin32                   227              py38he774522_1
pywin32-ctypes            0.2.0                 py38_1000
pyyaml                    5.3              py38he774522_0
pyzmq                     18.1.1           py38ha925a31_0
qdarkstyle                2.8                        py_0
qt                        5.9.7            vc14h73c81de_0
qtawesome                 0.6.1                      py_0
qtconsole                 4.6.0                      py_1
qtpy                      1.9.0                      py_0
requests                  2.22.0                   py38_1
rope                      0.16.0                     py_0
rtree                     0.9.3            py38h21ff451_0
setuptools                45.2.0                   py38_0
sip                       4.19.13          py38ha925a31_0
six                       1.14.0                   py38_0
snowballstemmer           2.0.0                      py_0
sortedcontainers          2.1.0                    py38_0
sphinx                    2.4.0                      py_0
sphinxcontrib-applehelp   1.0.1                      py_0
sphinxcontrib-devhelp     1.0.1                      py_0
sphinxcontrib-htmlhelp    1.0.2                      py_0
sphinxcontrib-jsmath      1.0.1                      py_0
sphinxcontrib-qthelp      1.0.2                      py_0
sphinxcontrib-serializinghtml 1.1.3                      py_0
spyder                    4.0.1                    py38_0
spyder-kernels            1.8.1                    py38_0
sqlite                    3.31.1               he774522_0
testpath                  0.4.4                      py_0
tornado                   6.0.3            py38he774522_3
traitlets                 4.3.3                    py38_0
ujson                     1.35             py38he774522_0
urllib3                   1.25.8                   py38_0
vc                        14.1                 h0510ff6_4
vs2015_runtime            14.16.27012          hf0eaf9b_1
watchdog                  0.10.2                   py38_0
wcwidth                   0.1.8                      py_0
webencodings              0.5.1                    py38_1
wheel                     0.34.2                   py38_0
win_inet_pton             1.1.0                    py38_0
wincertstore              0.2                      py38_0
wrapt                     1.11.2           py38he774522_0
yaml                      0.1.7                hc54c509_2
yapf                      0.28.0                     py_0
zeromq                    4.3.1                h33f27b4_3
zipp                      2.2.0                      py_0
zlib                      1.2.11               h62dcd97_3

[texadactyl]

Happened to me too on Xubuntu Linux 20.04 (beta).
Logs attached for conda update, info, and list.
conda_info.log
conda_list.log
conda_update.log

[texadactyl]

@ccordoba12 What changed in jedi 16 that caused an issue for spyder 4?

Temporary (I hope) work-around is okay:
After conda update --all, execute conda install spyder=4.0.1.

[emilmirzayev]

Same problem here. Conda does not update Spyder to 4.x instead keeps it at 3.6
Conda infos:

``` (base) C:\Users\emirzayev>conda env list # conda environments: # base * C:\Users\emirzayev\AppData\Local\Continuum\anaconda3

(base) C:\Users\emirzayev>conda info

 active environment : base
active env location : C:\Users\emirzayev\AppData\Local\Continuum\anaconda3
        shell level : 1
   user config file : C:\Users\emirzayev\.condarc

populated config files :
conda version : 4.8.2
conda-build version : 3.18.11
python version : 3.7.6.final.0
virtual packages :
base environment : C:\Users\emirzayev\AppData\Local\Continuum\anaconda3 (writable)
channel URLs : https://repo.anaconda.com/pkgs/main/win-64
https://repo.anaconda.com/pkgs/main/noarch
https://repo.anaconda.com/pkgs/r/win-64
https://repo.anaconda.com/pkgs/r/noarch
https://repo.anaconda.com/pkgs/msys2/win-64
https://repo.anaconda.com/pkgs/msys2/noarch
package cache : C:\Users\emirzayev\AppData\Local\Continuum\anaconda3\pkgs
C:\Users\emirzayev.conda\pkgs
C:\Users\emirzayev\AppData\Local\conda\conda\pkgs
envs directories : C:\Users\emirzayev\AppData\Local\Continuum\anaconda3\envs
C:\Users\emirzayev.conda\envs
C:\Users\emirzayev\AppData\Local\conda\conda\envs
platform : win-64
user-agent : conda/4.8.2 requests/2.22.0 CPython/3.7.6 Windows/10 Windows/10.0.17134
administrator : False
netrc file : None
offline mode : False
(base) C:\Users\emirzayev>conda list

packages in environment at C:\Users\emirzayev\AppData\Local\Continuum\anaconda3:

Name Version Build Channel

_ipyw_jlab_nb_ext_conf 0.1.0 py37_0
alabaster 0.7.12 py37_0
anaconda-client 1.7.2 py37_0
anaconda-navigator 1.9.7 py37_0
asn1crypto 1.3.0 py37_0
astroid 2.3.3 py37_0
attrs 19.3.0 py_0
babel 2.8.0 py_0
backcall 0.1.0 py37_0
backports 1.0 py_2
backports.functools_lru_cache 1.6.1 py_0
backports.tempfile 1.0 py_1
backports.weakref 1.0.post1 py_1
beautifulsoup4 4.8.2 py37_0
blas 1.0 mkl
bleach 3.1.0 py37_0
bzip2 1.0.8 he774522_0
ca-certificates 2020.1.1 0
certifi 2019.11.28 py37_0
cffi 1.14.0 py37h7a1dbc1_0
chardet 3.0.4 py37_1003
click 7.0 py37_0
cloudpickle 1.3.0 py_0
clyent 1.2.2 py37_1
colorama 0.4.3 py_0
conda 4.8.2 py37_0
conda-build 3.18.11 py37_0
conda-env 2.6.0 1
conda-package-handling 1.6.0 py37h62dcd97_0
conda-verify 3.4.2 py_1
console_shortcut 0.1.1 3
cryptography 2.8 py37h7a1dbc1_0
decorator 4.4.1 py_0
defusedxml 0.6.0 py_0
docutils 0.16 py37_0
entrypoints 0.3 py37_0
filelock 3.0.12 py_0
freetype 2.9.1 ha9979f8_1
future 0.18.2 py37_0
glob2 0.7 py_0
icc_rt 2019.0.0 h0cc432a_1
icu 58.2 ha66f8fd_1
idna 2.8 py37_0
imagesize 1.2.0 py_0
importlib_metadata 1.5.0 py37_0
intel-openmp 2020.0 166
ipykernel 5.1.4 py37h39e3cac_0
ipython 7.12.0 py37h5ca1d4c_0
ipython_genutils 0.2.0 py37_0
ipywidgets 7.5.1 py_0
isort 4.3.21 py37_0
jedi 0.16.0 py37_0
jinja2 2.11.1 py_0
jpeg 9b hb83a4c4_2
json5 0.9.1 py_0
jsonschema 3.2.0 py37_0
jupyter_client 5.3.4 py37_0
jupyter_core 4.6.1 py37_0
jupyterlab 1.2.6 pyhf63ae98_0
jupyterlab_server 1.0.6 py_0
keyring 21.1.0 py37_0
lazy-object-proxy 1.4.3 py37he774522_0
libarchive 3.3.3 h0643e63_5
libiconv 1.15 h1df5818_7
liblief 0.9.0 ha925a31_2
libpng 1.6.37 h2a8f88b_0
libsodium 1.0.16 h9d3ae62_0
libtiff 4.1.0 h56a325e_0
libxml2 2.9.9 h464c3ec_0
lz4-c 1.8.1.2 h2fa13f4_0
lzo 2.10 h6df0209_2
m2w64-gcc-libgfortran 5.3.0 6
m2w64-gcc-libs 5.3.0 7
m2w64-gcc-libs-core 5.3.0 7
m2w64-gmp 6.1.0 2
m2w64-libwinpthread-git 5.0.0.4634.697f757 2
markupsafe 1.1.1 py37he774522_0
mccabe 0.6.1 py37_1
menuinst 1.4.16 py37he774522_0
mistune 0.8.4 py37he774522_0
mkl 2020.0 166
mkl-service 2.3.0 py37hb782905_0
mkl_fft 1.0.15 py37h14836fe_0
mkl_random 1.1.0 py37h675688f_0
msys2-conda-epoch 20160418 1
navigator-updater 0.2.1 py37_0
nbconvert 5.6.1 py37_0
nbformat 5.0.4 py_0
notebook 6.0.3 py37_0
numpy 1.18.1 py37h93ca92e_0
numpy-base 1.18.1 py37hc3f5095_1
numpydoc 0.9.2 py_0
olefile 0.46 py37_0
openssl 1.1.1d he774522_4
packaging 20.1 py_0
pandas 1.0.1 py37h47e9c7a_0
pandoc 2.2.3.2 0
pandocfilters 1.4.2 py37_1
parso 0.6.1 py_0
patsy 0.5.1 py37_0
pickleshare 0.7.5 py37_0
pillow 7.0.0 py37hcc1f983_0
pip 20.0.2 py37_1
pkginfo 1.5.0.1 py37_0
powershell_shortcut 0.0.1 2
prometheus_client 0.7.1 py_0
prompt_toolkit 3.0.3 py_0
psutil 5.6.7 py37he774522_0
py-lief 0.9.0 py37ha925a31_2
pycodestyle 2.5.0 py37_0
pycosat 0.6.3 py37he774522_0
pycparser 2.19 py37_0
pyflakes 2.1.1 py37_0
pygments 2.5.2 py_0
pylint 2.4.4 py37_0
pyopenssl 19.1.0 py37_0
pyparsing 2.4.6 py_0
pyqt 5.9.2 py37h6538335_2
pyrsistent 0.15.7 py37he774522_0
pysocks 1.7.1 py37_0
python 3.7.6 h60c2a47_2
python-dateutil 2.8.1 py_0
python-libarchive-c 2.8 py37_13
pytz 2019.3 py_0
pywin32 227 py37he774522_1
pywin32-ctypes 0.2.0 py37_1000
pywinpty 0.5.7 py37_0
pyyaml 5.3 py37he774522_0
pyzmq 18.1.1 py37ha925a31_0
qt 5.9.7 vc14h73c81de_0
qtawesome 0.6.1 py_0
qtconsole 4.6.0 py_1
qtpy 1.9.0 py_0
requests 2.22.0 py37_1
rope 0.16.0 py_0
ruamel_yaml 0.15.87 py37he774522_0
scipy 1.4.1 py37h9439919_0
send2trash 1.5.0 py37_0
setuptools 45.2.0 py37_0
sip 4.19.8 py37h6538335_0
six 1.14.0 py37_0
snowballstemmer 2.0.0 py_0
soupsieve 1.9.5 py37_0
sphinx 2.4.0 py_0
sphinxcontrib-applehelp 1.0.1 py_0
sphinxcontrib-devhelp 1.0.1 py_0
sphinxcontrib-htmlhelp 1.0.2 py_0
sphinxcontrib-jsmath 1.0.1 py_0
sphinxcontrib-qthelp 1.0.2 py_0
sphinxcontrib-serializinghtml 1.1.3 py_0
spyder 3.3.6 py37_0
spyder-kernels 0.5.2 py37_0
sqlite 3.31.1 he774522_0
statsmodels 0.11.0 py37he774522_0
terminado 0.8.3 py37_0
testpath 0.4.4 py_0
tk 8.6.8 hfa6e2cd_0
tornado 6.0.3 py37he774522_3
tqdm 4.42.1 py_0
traitlets 4.3.3 py37_0
urllib3 1.25.8 py37_0
vc 14.1 h0510ff6_4
vs2015_runtime 14.16.27012 hf0eaf9b_1
wcwidth 0.1.8 py_0
webencodings 0.5.1 py37_1
wheel 0.34.2 py37_0
widgetsnbextension 3.5.1 py37_0
win_inet_pton 1.1.0 py37_0
wincertstore 0.2 py37_0
winpty 0.4.3 4
wrapt 1.11.2 py37he774522_0
xz 5.2.4 h2fa13f4_4
yaml 0.1.7 hc54c509_2
zeromq 4.3.1 h33f27b4_3
zipp 2.2.0 py_0
zlib 1.2.11 h62dcd97_3
zstd 1.3.7 h508b16e_0

</details>

[goanpeca]

We are working on this and this issue should be solved in a week or so. Thanks !

[remisalmon]

Last conda update --all solved it for me.

[goanpeca]

The fix should now be in place!

[ccordoba12]

Those are great news @remisalmon! Thanks a lot for the confirmation!

[texadactyl]

@goanpeca By "in place", do you mean Anaconda repos? When I attempt to update spyder (conda update spyder) to 4.0.1, I see this:

The following packages will be UPDATED:

  spyder                                       3.3.6-py37_0 --> 4.0.1-py37_0
  spyder-kernels                               0.5.2-py37_0 --> 1.8.1-py37_0

The following packages will be DOWNGRADED:

  jedi                                        0.16.0-py37_0 --> 0.14.1-py37_0
  parso                                          0.6.1-py_0 --> 0.5.2-py_0

I did not proceed. When I do conda update --all, no updates occur and spyder-related versions are this:

spyder                    3.3.6                    py37_0  
spyder-kernels            0.5.2                    py37_0

[goanpeca]

@goanpeca By "in place", do you mean Anaconda repos? When I attempt to update spyder (conda update spyder) to 4.0.1, I see this:

The following packages will be UPDATED:

  spyder                                       3.3.6-py37_0 --> 4.0.1-py37_0
  spyder-kernels                               0.5.2-py37_0 --> 1.8.1-py37_0

The following packages will be DOWNGRADED:

  jedi                                        0.16.0-py37_0 --> 0.14.1-py37_0
  parso                                          0.6.1-py_0 --> 0.5.2-py_0

Yes that is correct and you should proceed. (Why not proceed?)

[texadactyl]

Because, jedi and parso get down-graded. That is part of the original problem.

[texadactyl]

Ok, just allowed the conda update spyder to proceed.
Now, I do another conda update --all. Results:

The following packages will be UPDATED:

  jedi                                        0.14.1-py37_0 --> 0.16.0-py37_0
  parso                                          0.5.2-py_0 --> 0.6.1-py_0

The following packages will be DOWNGRADED:

  spyder                                       4.0.1-py37_0 --> 3.3.6-py37_0
  spyder-kernels                               1.8.1-py37_0 --> 0.5.2-py37_0


Preparing transaction: ...working... done
Verifying transaction: ...working... done
Executing transaction: ...working... done

[texadactyl]

So, I am back to the #11550 symptoms.
My work-around:
Whenever I do an update --all,
I follow that with update spyder which downgrades jedi and parso.

[ccordoba12]

Because, jedi and parso get down-graded. That is part of the original problem.

Spyder 4 requires lower versions of Jedi and Parso than Spyder 3, so that's correct.

[texadactyl]

When the term "fix" was used, I had something else in mind.
Not complaining.
I'll keep my work-around for the time being.

[texadactyl]

P.S. Sympathies about getting marooned by "updated" interfaces with a package dependency. Been there too in another language.