2022/7/30: Q We cannot access the videos without login? A My mistake. I went over the videos by hand, one by one, and tried to switch them all to be viewable without login. Do let me know if I missed another video...
2022/8/20: Q In ppectr_d2p4_graphs.ipynb, exercise 4 gives an error, about the index A Also my mistake, a typo in the file in the beginning. The load statement in the first cell was originally
df= pd.read_csv('data/%s.csv' % sData)
but should have been
df= pd.read_csv('data/%s.csv' % sData, index_col= ['Year', 'Period'])
Redownload, or change by hand. And think about it: What is the difference, why did you originally get the error?