Which cities appear in orders but not in stalls
pandas · from The index, and alignment
df.indexalignmentreindexset_indexreset_indexfill_valuePutting the kettle on…
Starting up…
Exercise 4
Which cities appear in orders but not in stalls? Return them as an Index, using the two frames' city columns.
your answer
stuck? the lesson behind it
The index, and alignment
Labels take part in the arithmetic — the one idea NumPy doesn’t have.