cannot import cv2 module after installing opencv 3.4.1 from anaconda

[melentye]

Actual Behavior

$ python -c 'import cv2'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'cv2'

Expected Behavior

It should import cv2 module without errors.

By the way, it seems to work if I install opencv 3.3.1 from anaconda channel.

Steps to Reproduce

1. install opencv:

$ conda install -c anaconda opencv=3.4.1
Fetching package metadata .............
Solving package specifications: .

Package plan for installation in environment /Users/andrey.melentyev/.pyenv/versions/miniconda3-latest/envs/envy_mcenvface:

The following packages will be UPDATED:

    opencv: 3.3.1-py36hb620dcb_1 anaconda --> 3.4.1-py36h40b0b35_1 anaconda

Proceed ([y]/n)? y

then try importing cv2:

python -c 'import cv2'

Anaconda or Miniconda version:

$ conda --version
conda 4.3.30

Operating System:

macOS 10.13.4 but it works the same under Debian in Docker.

conda info

Current conda install:

               platform : osx-64
          conda version : 4.3.30
       conda is private : False
      conda-env version : 4.3.30
    conda-build version : not installed
         python version : 3.6.3.final.0
       requests version : 2.18.4
       root environment : /Users/andrey.melentyev/.pyenv/versions/miniconda3-latest  (writable)
    default environment : /Users/andrey.melentyev/.pyenv/versions/miniconda3-latest/envs/envy_mcenvface
       envs directories : /Users/andrey.melentyev/.pyenv/versions/miniconda3-latest/envs
                          /Users/andrey.melentyev/.conda/envs
          package cache : /Users/andrey.melentyev/.pyenv/versions/miniconda3-latest/pkgs
                          /Users/andrey.melentyev/.conda/pkgs
           channel URLs : https://repo.continuum.io/pkgs/main/osx-64
                          https://repo.continuum.io/pkgs/main/noarch
                          https://repo.continuum.io/pkgs/free/osx-64
                          https://repo.continuum.io/pkgs/free/noarch
                          https://repo.continuum.io/pkgs/r/osx-64
                          https://repo.continuum.io/pkgs/r/noarch
                          https://repo.continuum.io/pkgs/pro/osx-64
                          https://repo.continuum.io/pkgs/pro/noarch
            config file : /Users/andrey.melentyev/.condarc
             netrc file : None
           offline mode : False
             user-agent : conda/4.3.30 requests/2.18.4 CPython/3.6.3 Darwin/17.5.0 OSX/10.13.4
                UID:GID : 1545480448:1197883525

conda list --show-channel-urls

#
absl-py                   0.1.10                    <pip>
alabaster                 0.7.10           py36h174008c_0    defaults
appnope                   0.1.0            py36hf537a9a_0    anaconda
asn1crypto                0.24.0                   py36_0    defaults
astor                     0.6.2                     <pip>
astroid                   1.6.1                    py36_0    anaconda
attrs                     17.4.0                   py36_0    anaconda
babel                     2.5.3                    py36_0    defaults
backcall                  0.1.0                    py36_0    anaconda
beautifulsoup4            4.6.0                     <pip>
blas                      1.0                         mkl    anaconda
bleach                    1.5.0                     <pip>
bleach                    2.1.3                    py36_0    anaconda
bs4                       0.0.1                     <pip>
bzip2                     1.0.6                hd86a083_4    anaconda
ca-certificates           2017.08.26           ha1e5d58_0    defaults
cairo                     1.14.12              he60d9cb_2    anaconda
certifi                   2018.1.18                py36_0    defaults
cffi                      1.11.5           py36h342bebf_0    defaults
chardet                   3.0.4            py36h96c241c_1    defaults
chardet                   3.0.4                     <pip>
click                     6.7              py36hec950be_0    anaconda
cookies                   2.2.1                    py36_0    anaconda
cryptography              2.2.1            py36h1de35cc_0    defaults
cycler                    0.10.0           py36hfc81398_0    anaconda
dbus                      1.13.2               h760590f_1    anaconda
decorator                 4.2.1                    py36_0    anaconda
docutils                  0.14             py36hbfde631_0    defaults
entrypoints               0.2.3            py36hd81d71f_2    anaconda
enum34                    1.1.6                     <pip>
expat                     2.2.5                hb8e80ba_0    anaconda
ffmpeg                    3.4                  h766ddd1_0    anaconda
fontconfig                2.12.6               h9850fc5_0    anaconda
freetype                  2.8                  h12048fb_1    anaconda
gast                      0.2.0                     <pip>
gettext                   0.19.8.1             h15daf44_3    anaconda
glib                      2.56.1               h35bc53a_0    anaconda
graphite2                 1.3.11               h337f25e_1    anaconda
grpcio                    1.10.0                    <pip>
h5py                      2.7.1                     <pip>
h5py                      2.7.1            py36ha38d409_0    anaconda
harfbuzz                  1.7.6                h171471c_1    anaconda
hdf5                      1.8.18               h017327d_1    anaconda
html5lib                  1.0.1            py36h2f9c1c0_0    anaconda
html5lib                  0.9999999                 <pip>
icu                       58.2                 h4b95b61_1    anaconda
idna                      2.6              py36h8628d0a_1    defaults
idna                      2.6                       <pip>
imagesize                 1.0.0                    py36_0    defaults
intel-openmp              2018.0.0             h8158457_8    anaconda
ipykernel                 4.8.2                    py36_0    anaconda
ipython                   6.4.0                    py36_0    anaconda
ipython_genutils          0.2.0            py36h241746c_0    anaconda
ipywidgets                7.2.1                    py36_0    anaconda
isort                     4.3.4                    py36_0    anaconda
jasper                    1.900.1              h1f36771_4    anaconda
jedi                      0.11.1                   py36_0    anaconda
jinja2                    2.10             py36hd36f9c5_0    defaults
jpeg                      9b                   he5867d9_2    anaconda
jsonschema                2.6.0            py36hb385e00_0    anaconda
jupyter                   1.0.0                    py36_4    anaconda
jupyter_client            5.2.3                    py36_0    anaconda
jupyter_console           5.2.0            py36hccf5b1c_1    anaconda
jupyter_core              4.4.0            py36h79cf704_0    anaconda
Keras                     2.1.4                     <pip>
kiwisolver                1.0.1            py36h792292d_0    anaconda
lazy-object-proxy         1.3.1            py36h2fbbe47_0    anaconda
libcxx                    4.0.1                h579ed51_0    defaults
libcxxabi                 4.0.1                hebd6815_0    defaults
libedit                   3.1                  hb4e282d_0    defaults
libffi                    3.2.1                h475c297_4    defaults
libgfortran               3.0.1                h93005f0_2    anaconda
libiconv                  1.15                 hdd342a3_7    anaconda
libopus                   1.2.1                h169cedb_0    anaconda
libpng                    1.6.34               he12f830_0    anaconda
libprotobuf               3.4.1                h326466f_0    anaconda
libsodium                 1.0.16               h3efe00b_0    anaconda
libtiff                   4.0.9                h0dac147_0    anaconda
libvpx                    1.6.1                h057a404_0    anaconda
libxml2                   2.9.8                h2866646_0    anaconda
libxslt                   1.1.32               hb819dd2_0    anaconda
lockfile                  0.12.2                   py36_0    anaconda
luigi                     2.7.1            py36h8b82474_0    anaconda
lxml                      4.2.1            py36h7166777_0    anaconda
Markdown                  2.6.11                    <pip>
markupsafe                1.0              py36h3a1e703_1    defaults
matplotlib                2.2.2            py36ha7267d0_0    anaconda
mccabe                    0.6.1            py36hdaeb55d_0    anaconda
mistune                   0.8.3            py36h1de35cc_1    anaconda
mkl                       2018.0.2                      1    anaconda
mkl_fft                   1.0.1            py36h917ab60_0    anaconda
mkl_random                1.0.1            py36h78cc56f_0    anaconda
more-itertools            4.1.0                    py36_0    anaconda
nbconvert                 5.3.1            py36h810822e_0    anaconda
nbformat                  4.4.0            py36h827af21_0    anaconda
ncurses                   6.0                  hd04f020_2    defaults
nltk                      3.3.0                    py36_0    anaconda
notebook                  5.5.0                    py36_0    anaconda
numpy                     1.14.3           py36h9bb19eb_1    anaconda
numpy-base                1.14.3           py36h479e554_1    anaconda
olefile                   0.45.1                   py36_0    anaconda
opencv                    3.4.1            py36h40b0b35_1    anaconda
openssl                   1.0.2o               h26aff7b_0    anaconda
packaging                 17.1                     py36_0    defaults
pandas                    0.22.0           py36h0a44026_0    anaconda
pandoc                    1.19.2.1             ha5e8f32_1    anaconda
pandocfilters             1.4.2            py36h3b0b094_1    anaconda
parso                     0.1.1            py36hc90e01c_0    anaconda
patsy                     0.5.0                    py36_0    defaults
pcre                      8.42                 h378b8a2_0    anaconda
pexpect                   4.4.0                    py36_0    anaconda
pickleshare               0.7.4            py36hf512f8e_0    anaconda
pillow                    5.1.0            py36hfcce615_0    anaconda
pip                       9.0.3                    py36_0    anaconda
pixman                    0.34.0               hca0a616_3    anaconda
plaidml                   0.2.0                     <pip>
plaidml-keras             0.2.0                     <pip>
pluggy                    0.6.0            py36hb1d0581_0    anaconda
prompt_toolkit            1.0.15           py36haeda067_0    anaconda
protobuf                  3.5.1                     <pip>
ptyprocess                0.5.2            py36he6521c3_0    anaconda
py                        1.5.2            py36ha69170d_0    anaconda
pycodestyle               2.4.0                    py36_0    anaconda
pycparser                 2.18             py36h724b2fc_1    defaults
pydot                     1.2.4                     <pip>
pygments                  2.2.0            py36h240cd3f_0    anaconda
pylint                    1.8.2                    py36_0    anaconda
pyopenssl                 17.5.0           py36h51e4350_0    defaults
pyparsing                 2.2.0            py36hb281f35_0    anaconda
pyqt                      5.9.2            py36h11d3b92_0    anaconda
pysocks                   1.6.8                    py36_0    defaults
pytest                    3.5.1                    py36_0    anaconda
python                    3.6.5                hc167b69_1    anaconda
python-daemon             2.1.2                    py36_0    anaconda
python-dateutil           2.6.1            py36h86d2abb_1    anaconda
pytz                      2018.3                   py36_0    anaconda
PyYAML                    3.12                      <pip>
pyzmq                     17.0.0           py36h1de35cc_1    anaconda
qt                        5.9.5                h02808f3_0    anaconda
qtconsole                 4.3.1            py36hd96c0ff_0    anaconda
readline                  7.0                  hc1231fa_4    defaults
requests                  2.18.4           py36h4516966_1    anaconda
requests                  2.18.4                    <pip>
responses                 0.9.0                    py36_0    anaconda
scikit-learn              0.19.1           py36hffbff8c_0    anaconda
scipy                     1.0.1            py36hcaad992_0    anaconda
selenium                  3.8.0                    py36_0    conda-forge
send2trash                1.5.0                    py36_0    anaconda
setuptools                38.5.1                   py36_0    defaults
simplegeneric             0.8.1                    py36_2    anaconda
sip                       4.19.8           py36h0a44026_0    anaconda
six                       1.11.0           py36h0e22d5e_1    anaconda
snowballstemmer           1.2.1            py36h6c7b616_0    defaults
sphinx                    1.7.4                    py36_0    anaconda
sphinxcontrib             1.0              py36h9364dc8_1    defaults
sphinxcontrib-websupport  1.0.1            py36h92f4a7a_1    defaults
sqlalchemy                1.2.4            py36h1de35cc_0    defaults
sqlite                    3.23.1               hf1716c9_0    anaconda
statsmodels               0.8.0            py36h9c68fc9_0    defaults
tensorboard               1.6.0                     <pip>
tensorflow                1.6.0                     <pip>
tensorflow-tensorboard    1.5.1                     <pip>
termcolor                 1.1.0                     <pip>
terminado                 0.8.1                    py36_1    anaconda
testpath                  0.3.1            py36h625a49b_0    anaconda
tk                        8.6.7                h35a86e2_3    defaults
tornado                   4.5.3                    py36_0    anaconda
tqdm                      4.23.3                   py36_0    anaconda
traitlets                 4.3.2            py36h65bd3ce_0    anaconda
typing                    3.6.4                    py36_0    defaults
urllib3                   1.22                      <pip>
urllib3                   1.22             py36h68b9469_0    defaults
wcwidth                   0.1.7            py36h8c6ec74_0    anaconda
webencodings              0.5.1            py36h3b9701d_1    anaconda
Werkzeug                  0.14.1                    <pip>
wheel                     0.30.0           py36h5eb2c71_1    defaults
widgetsnbextension        3.2.1                    py36_0    anaconda
wrapt                     1.10.11          py36hc29e774_0    anaconda
xz                        5.2.3                h0278029_2    defaults
zeromq                    4.2.5                h378b8a2_0    anaconda
zlib                      1.2.11               hf3cbc9b_2    defaults

[mingwandroid]

This is my fault. Until I fix it you can use:

conda install py-opencv

[mingwandroid]

Fixed.

[ralexx]

defaults::opencv=3.4.2 still raises ModuleNotFoundError when calling import cv2 (atlanhq/camelot#167). @mingwandroid's workaround to

conda install py-opencv

still seems to be valid.

macOS 10.12.6
conda 4.5.11
conda base python 3.7
target env for opencv: python 3.6

[mingwandroid]

Edit: nope, you used defaults.