[Python] Python - package not found although it is installed

I have the following version of python

import sys
print(sys.version)

3.6.5 | packaged by conda-forge | (default, Apr 6 2018, 13:44:09)
[GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)]


I installed a package with the following command

pip install wfdb

It is succesfully installed because when I then write the command:

pip show wfdb

The following information appears Location: /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages

However, when I type the command import wfdb in Python notebook or the version of python in terminal, I get the following message

No module named 'wfdb'

Does it have to do with the path on which python is checking where the packages are? How to check this and how to change it?

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