The mapper takes a list of tuples. Each tuple has three elements: column name(s): The first element is a column name from the pandas DataFrame, or a list containing one or multiple columns (we will ...

In this approach, we pass get_dummies() a column in a data frame and it creates a full matrix of zero-one values. In other words, it gives us a matrix with 103 rows (because we have 103 rows in the ...

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