No module named 'openpyxl' - Python 3.4 - Ubuntu

Question

I installed openpyxl with

$ pip install openpyxl

when I try the command

from openpyxl import Workbook
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Answer 1

You have to install it explixitly using the python package manager as

1. pip install openpyxl for Python 2
2. pip3 install openpyxl for Python 3