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

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“Have you tried turning it off and on again?” (Roy of The IT crowd)

This happened to me today, which is why I ended up to this page. Seeing that error was weird since, recently, I have not made any changes in my Python environment. Interestingly, I observed that if I open a new notebook and import pandas I would not get the same error message. So, I did shutdown the troublesome notebook and started it again and voila it is working again!

Even though this solved the problem (at least for me), I cannot readily come up with an explanation as to why it happened in the first place!

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