Unable to use qiskit_textbook module

Question

When I tried to use the Qiskit textbook module, it threw the following error:

Command was:

from qiskit_textbook.tools import array_to_latex
array_to_latex(final_state, pretext="\\text{Statevector} = ")

Error was:

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-9-fe86c66f7ae0> in <module>
----> 1 from qiskit_textbook.tools import array_to_latex
      2 array_to_latex(final_state, pretext="\\text{Statevector} = ")

ModuleNotFoundError: **No module named 'qiskit_textbook'**

When I looked up the version I had, it showed the following:

{'qiskit-terra': '0.12.0',
 'qiskit-aer': '0.4.1',
 'qiskit-ignis': '0.2.0',
 'qiskit-ibmq-provider': '0.5.0',
 'qiskit-aqua': '0.6.4',
 'qiskit': '0.16.1'}

Can someone help me in resolving the issue?

Answer 1

Use this command to install qiskit-textbook module

pip install git+https://github.com/qiskit-community/qiskit-textbook.git#subdirectory=qiskit-textbook-src

Answer 2

The qiskit textbook is not a standard module included with qiskit, it has to be installed separately. The repo where it is kept is here. This link explains how to pip install from a git repo, you need to use a slightly different command to normal pip installs.