Pandas removed DataFrame.append in v2.0.0 #8
Description
As noted in the changelog for v2.0.0:
https://pandas.pydata.org/docs/whatsnew/v2.0.0.html#removal-of-prior-version-deprecations-changes
Removed deprecated Series.append(), DataFrame.append(), use concat() instead (GH 35407)
This will break the Adding values section in 3 - Pandas - DataFrames.ipynb.