The bus DataFrame contains a column called business id$,$ which probably corresponds to a unique business id$.$ However, we will first rename that column to bid for simplicity.

Note: In practice, we might want to do this renaming when the table is loaded, but for grading purposes, we will do it here.

bus $=$ bus.rename$($columns$=\{"$business id column": "bid"$\})$

Examining the entries in bus, is the bid unique for each record $($i$.$e$.$ each row of data$)?$ Your code should compute the answer, i$.$e$.$ don't just hard code True or False.