Importing Pandas gives error AttributeError: module 'pandas' has no attribute 'core' in iPython Notebook

Question

I am running a iPython notebook via the Anaconda Navigator app (version 1.1.0). When I want to import pandas it gives me a strange error. I thought the Anaconda app included

Answer 1

I had a similar issue since I installed pandas using python -m pip install pandas --upgrade --user which installed a conflicting version in my user python packages directory, masking the Anaconda installed version that other dependencies relied upon.

conda list | grep pandas
pandas == 0.23.4

python -m pip list | grep pandas
pandas == 0.24.0

So uninstalling the user directory masked version cleaned up the issue for me.

python -m pip uninstall pandas

For reference all possible python packages are installed in the directories listed from this command:

python -m site

Might be worth iterating through these and checking for duplicates.

Edit: Since my original answer I learnt you can run:

python -m pip list -v

And it shows the directory the library is installed. This often shows whether the library you want is in a virtual environment, conda environment, user directory, system site packages etc.