I have code that requires: import cv2
but get the error message: Exception has occurred: ModuleNotFoundError
No module named 'cv2'
I have seen exactly the same question before, but all the suggestions fail. The question is 6 years old and hence am repeating it.
various failed suggestions:
conda install --channel https://conda.anaconda.org/menpo opencv3
conda install -c menpo opencv
I am using Windows 10 and have python 3.8.1 running.
I have removed cv2 from the code which works without error and resolves the issue.
The link here (at time of writing, version 4.1.2.3) describes the opencv-python package:
opencv-python link
With the following description of cv2 towards the bottom of the page:
It's easier for users to understand opencv-python than cv2 and it makes it easier to find the package with search engines. cv2 (old interface in old OpenCV versions was named as cv) is the name that OpenCV developers chose when they created the binding generators. This is kept as the import name to be consistent with different kind of tutorials around the internet. Changing the import name or behaviour would be also confusing to experienced users who are accustomed to the import cv2.
Related
I'm relatively new to python, so please excuse my ignorance on what could be a very easy fix. I am running python 3.6 through the Rodeo IDE, and it has been great, as it is similar to R-Studio (which I am very familiar with). As an aspiring data scientist, I am trying to learn how to fit regression and time series models to data, and all of the tutorials that I have found all say that I need various packages, all of which should be included in the Anaconda library. After downloading and re-downloading Python, Rodeo, and Anaconda, and trying various online fixes, I have been unable to successfully load the scikit-learn and the statsmodels modules.
#here is everything I have tried.
#using pip
! pip install 'statsmodels'
! pip install 'scikit-learn'
! pip install 'sklearn'
I don't get any errors here, and to be honest I'm kind of confused as to what this actually does, but I have seen many people online always suggest that this is a big problem when trying to import modules.
#using import
import sklearn
import statsmodels
from sklearn import datasets
import statsmodels.api as sm
all of the above give me the same error:
import statsmodels.api as sm
ImportError: No module named 'statsmodels'
ImportError: Traceback (most recent call last)
ipython-input-184-6030a6549dc0 in module()
----> 1 import statsmodels.api as sm
ImportError: No module named 'statsmodels'
I have tried to set my working directory to the Anaconda 3 file that has all of the packages and rerunning the above code with no success.
I'm thinking that the most likely problem has to do with my inexperience, and it is probably a simple fix. Is it possible that the IDE is bad or anaconda just doesn't like me?
So keeping all of the above in mind, the question is, how can I import these modules successfully so that I can access their functionality?
Option 1:
After installing packages with pip, try closing and reopening your IDE/Jupyter Notebook and try again.
This is a known bug that Jake VanderPlas outlined here
Option 2:
Don't put quotations around your pip messages.
!pip install -U statsmodels
!pip install scikit-learn
Option 3:
Also are you using Anaconda? If you are, you should already have scikit-learn. If you are trying inside Rodeo, I think you need to set your path inside Rodeo. Open Rodeo and set the Python Path to your fresh anaconda. See here
Previously ROS was installed in my system which requires opencv for its implementation and now I am using anaconda in which I need to use the opencv library once again. While writing python code import cv2 throws an error module not found.
Is there any way to use that opencv library which ROS installed in anaconda
Although I installed opencv once again using conda.
$conda install -c conda-forge opencv
however opencv-3.3 was installed using above command. Now my python code is showing different import error as shown below:
ImportError Traceback (most recent call last)
<ipython-input-9-6b49ad4d4ca5> in <module>()
1 from random import shuffle
2 import glob
----> 3 import cv2
4 shuffle_data = True # shuffle the addresses before saving
5 hdf5_path = 'dataset.hdf5' # address to where you want to save the hdf5 file
ImportError: /home/kamal/ros_catkin_ws/install_isolated/lib/python2.7/dist-packages/cv2.so: undefined symbol: PyCObject_Type
How can I particularly specify which opencv library to use. What env variables I need to change.
Any help will be appreciated.
uncommenting the line source /home/user/ros_catkin_ws/install_isolated/share/setup.bash in the .bashrc file dosen't help. You also need to remove the extrasys.path added by the ROS environment.
In a python console
import sys
print (sys.path)
you will see multiple paths related to ROS
then remove the unwanted part of the path by
sys.path.remove('unwanted_path')
This will solve the problem but now ROS will not work. To make it work you need to append the removed path again.
If someone has a better approach please answer.
So I trying to install and run from MSFT the cntk, you know, just for fun. Anyway, I keep getting this error which says:
import numpy as np
ModuleNotFoundError: No module named 'numpy'
Now I have looked around here a little and I found a post saying that I needed to install the latest version of NumPy, but when I go to do that, I get back this:
Requirement already satisfied: NumPy in c:\users\username\appdata\local\continuum\anaconda3\envs\cntk-py34\lib\site-packages
SO I really have no idea what is going on here.
Anyway, thanks in advance.
Is your IDE linked to Anaconda env? If you open up the Anaconda prompt and import numpy do you get the same error?
You probably have an environment outside of Anaconda which does not have numpy installed.
In my case, I was executing [filename].py from the Anaconda prompt as I would a batch file and was getting this error. I confirmed numpy was install by executing pip list.
Funning python and passing the script file name as an argument, eg python [filename].py, correctly imported the numpy module and executed the script without error.
We're running into a lot of problems installing word2vec within python3. We just keep getting a standard error that python can't find the package it's looking for.
Competition-Repo/agents$ python3
Python 3.4.3 [GCC 4.8.4] on linux
import word2vec
Traceback (most recent call last):
File "", line 1, in ImportError: No module named 'word2vec'
Most everything I've found has either someone else's implementation of word2vec within python3, or is accessed through Gensim. The pip-install for python2 imports flawlessly, now we need to set up the same thing for python3.
Thanks!
-Ben
I just installed the product from Github site without incident on Python 3.4 but Win7Pro. It imports but who knows after that, right?
It comes with a setup.py. Being an inveterate experimenter I tried that, contrary to instructions. It failed.
At least this is easy to try, assuming you haven't already.
How exactly are you importing in python2?
With gensim, you can either import with -
from gensim.models import Word2Vec
or with -
from gensim.models import word2vec
The former is for the class Word2Vec and the latter for the module.
There is a tutorial here for getting started
The way we were able to install it was through:
sudo pip3 install cython
sudo pip3 install word2vec
Turned out to be a lot easier than I had thought..
I am using Anaconda with python 3.4 and I am not able to get all the pillow packages I need I am afraid on Windows 8.1.
I installed pillow via the Anaconda console with:
pip install pillow
which lead to:
The following packages will be UPDATED:
conda: 3.10.0-py34_0 --> 3.10.1-py34_0
conda-env: 2.1.3-py34_0 --> 2.1.4-py34_0
pillow: 2.7.0-py34_0 --> 2.8.1-py34_0
pip: 6.0.8-py34_0 --> 6.1.1-py34_0
setuptools: 14.3-py34_0 --> 15.0-py34_0
Now, in the spyder IPython console I start with: import tkinter, from PIL import ImageTk I have no errors here, but when executing ImageTk.PhotoImage(file='a.jpg') I receive an error, telling me: ImportError: cannot import name '_imagingtk'
What did I miss?
I know this is not a complete answer, but I have had the same problem and spent a day trying to figure it out...
Here is a small subset of things I tried yesterday to the best of my weak memory...
-Tried upgrating to the latest Python environment using anaconda (tip: you can create one using
conda update conda
conda update anaconda
(I think that's it, but may have tried to make sure for key packages explicitly etc.)
-Tried using Python 3.3 environment using anaconda (tip: you can create one using
conda update conda
conda create -n py33 python=3.3 anaconda
activate py33
-Tried using PythonWin instead of anaconda (that one took some time, had to install packets like numpy manually...)
-Tried updating / downgrading / installing/ uninstalling all kinds of different variations of Pillow, PIL, etc....
-Tried using opencv instead of PIL, though did not try to write my own components...
-Tried manually copying Tcl/tk and a few others to the lib directory as suggested by some posts
-Tried using import tkinter instead of Tkinter, using import Image vs. form PIL import Image (and in general taking Image from PIL, or opencv, or Tkinter) and a lot of other similar changes to the point it fell I was doing silly things
-...
At the end, I googled a few pages about GUIs in python, and now I am using wx... I had to run
conda install wxpython
and that was it. I have to say that after all this, I am presently surprised by how easy it was to make it work, here is a code example...
You need tcl/tk library.
Install them using apt-get
Do sudo apt-get install tk8.6-dev tcl8.6-dev
--Reference.