installing chaco [anaconda] UnsatisfiableError conflict chaco mkl_fft - python

I want to install chaco by anaconda,
I got the following results :
conda install -c anaconda chaco
UnsatisfiableError: The following specifications were found to be in conflict:
- chaco
- mkl_fft
enable is a dependency of chaco,
conda install -c anaconda enable
UnsatisfiableError: The following specifications were found to be in conflict:
- enable
- mkl_fft
I have already installed mkl_fft.
I am new to using anaconda.
Do you have any solution?
regards

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UnsatisfiableError: pyqt and py-opencv in conflict

For my College project, i tried installing pyqt with command conda install pyqt=4 but it shows error as shown below (even this error comes after solving environment for few minutes).
I am new to these stuffs, can anyone please help me over this!
(tensorflow_cpu) F:\BE project\TensorFlow\addons\labelImg>conda install pyqt=4
Solving environment: failed
UnsatisfiableError: The following specifications were found to be in conflict:
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Use "conda info <package>" to see the dependencies for each package.
The problem is that py-opencv requires python 3.6 or above where as pyqt=4 requires python2.7. Hence there will be a conflict between these two packages.
To avoid this conflict and use both the packages together, follow the below steps. Note that here the pyqt version will get upgrade to 5.9.2
Commands:
Create a new conda environment to avoid package mismatches.
conda create -n pyqt python=3.6
Here pyqt is the conda environment name
Activate the environment:
activate pyqt
Install py-opencv
conda install -c anaconda py-opencv
Install pyqt package:
conda install -c alges pyqt
While executing this step, pyqt version will be 5.9.2
Now you will be able to use both the packages with python3.6

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I uninstalled anaconda and installed again. But same issue. Could you please suggest a workaround.
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UnsatisfiableError: The following specifications were found to be in conflict:

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Not sure why Opencv3 is already there and why zict is a problem.
Any way I can uninstall both of them and then probably start fresh installation ?
Or what would be the correct way to resolve this ?'
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