45  Data Information

At this phase we could address questions such as how can we extract information about the data that we have?

A sample of these kind of questions is presented below:

• How many (non-null) observations do we have? To answer this question, we can run:

data.info()

• How many unique columns/features do we have?

data.column.unique()

• Which columns (if any) contain missing data?

data[data.isnull().any(axis=1)]

• What is the data type of each column?

data.dtypes