Cannot import qiskit_algorithms on Amazon Braket note book

Question

I was going to use Braket in us-east1. I wanted to use qiskit, so I wanted to import the module, but an error occurred.

I referred to the following URL https://qiskit-community.github.io/qiskit-braket-provider/tutorials/3_tutorial_minimum_eigen_optimizer.html

Checking with !pip list, qiskit_algorithms is installed without any problem.

【code】

!pip install qiskit
!pip install qiskit-optimization
!pip install qiskit-algorithms

from qiskit import QuantumCircuit, transpile
from qiskit.quantum_info import SparsePauliOp
from qiskit.primitives import Sampler
from qiskit_aer import AerSimulator
from qiskit_optimization import QuadraticProgram
from qiskit_algorithms.minimum_eigensolvers import QAOA
from qiskit_algorithms.optimizers import COBYLA
from qiskit_algorithms import NumPyMinimumEigensolver
from qiskit_optimization.algorithms import MinimumEigenOptimizer

【output】

ModuleNotFoundError                       Traceback (most recent call last)
Cell In[7], line 10
      4 from qiskit_aer import AerSimulator
      5 # from qiskit_optimization import QuadraticProgram
      6 # from qiskit_algorithms.minimum_eigensolvers import QAOA
      7 # from qiskit_algorithms.optimizers import COBYLA
      8 # from qiskit_algorithms import NumPyMinimumEigensolver
      9 # from qiskit_optimization.algorithms import MinimumEigenOptimizer
---> 10 import qiskit_optimization

ModuleNotFoundError: No module named 'qiskit_optimization'

How can I install qiskit_algorithms and qiskit_optimization without problems?

I have tried the following.

• Verify that the module is installed with a !pip list
• Restart kernel
• Start another notebook
• Verify that the installed path of the package is correct
• Confirm that the module works fine in the local environment

Answer 1

The error is straight up telling you that the module isn't installed, so we can work with that, or else there's some issue with how you've installed it. This can often be something like permissions or it not running on the same Python environment. Confirm you've got the latest upgrades.

!pip install --upgrade qiskit
!pip install --upgrade qiskit-optimization
!pip install --upgrade qiskit-algorithms

If you need to install this on the environment where your kernel is running, try the following. This is worth trying as you are getting a clear error that the package isn't installing where it is trying to run, so let's rule this out.

%pip install --upgrade qiskit
%pip install --upgrade qiskit-optimization
%pip install --upgrade qiskit-algorithms

Now keep it simple for sake of testing an import only the necessary modules.

from qiskit import QuantumCircuit, transpile
from qiskit.quantum_info import SparsePauliOp
from qiskit.aqua import QuantumInstance
from qiskit.optimization import QuadraticProgram
from qiskit.algorithms import QAOA, NumPyMinimumEigensolver
from qiskit.optimization.algorithms import MinimumEigenOptimizer

That should do it. Make sure to run it in an environment where you have the necessary permissions to install packages using pip. If you are using a Jupyter notebook, you might want restart the kernel and run the cells again to ensure that the new package is imported correctly. I've had this issue before so hopefully my fixes work for you too.

Answer 2

In this case, can you run

%pip install --upgrade qiskit
%pip install --upgrade qiskit-optimization
%pip install --upgrade qiskit-algorithms

This will install the library in the environment where the kernel is running instead of the base environment. The command !pip will use the base environment.

These commands should be ran from a Jupyter notebook. If you want to run pip installs from a terminal in the Braket instance, you can go to the terminal and activate the Braket environment using:

cd /home/ec2-user/
source ~/anaconda3/etc/profile.d/conda.sh
conda activate Braket

From there, you can then run the pip commands:

pip install --upgrade qiskit
pip install --upgrade qiskit-optimization
pip install --upgrade qiskit-algorithms

In the case of Amazon Braket, qiskit is already installed as a direct dependency. However, it is also a dependency of the qiskit_braket_provider which is installed into the environment.

In the case of older versions of the qiskit-braket-provider, qiskit 1.x was not supported. However, new versions (as of this commit from around 2 weeks ago) of Braket Notebook Instances do have that support. If you do not wish for your full environment to get updated, you can run the lines:

# From a Jupyter notebook
%pip install --upgrade qiskit_braket_provider
%pip install --upgrade qiskit
%pip install --upgrade qiskit-optimization
%pip install --upgrade qiskit-algorithms

There is also an option to stop and then start the notebook again. This will pull in the latest Braket examples and environment but will result in loss of work. For your use case, attempting the pip upgrades should unblock your issue.

Edit: After some testing, there is also an issue of incompatibility with moving to qiskit 1.x on Braket notebooks. The reason for this is that qiskit==0.46.x is currently installed. This version of qiskit installs qiskit-terra, the old name for the qiskit package for compatibility. Therefore, when running the upgrades and installing qiskit 1.x, qiskit-terra is kept. To work around this, try running:

%pip uninstall qiskit-terra
%pip uninstall qiskit
%pip install --upgrade qiskit
%pip install --upgrade qiskit-optimization
%pip install --upgrade qiskit-algorithms