#77 Pandas Data Frame aggregate, assign and astype function |

Описание: DataFrame.aggregate:
The main task of the DataFrame.aggregate() function is to apply some aggregation to one or more columns. The most frequently used aggregations are: sum, min and max

DataFrame.assign:
The assign() method is also responsible for adding a new column into a DataFrame. If we re-assign an existing column, then its value will be overwritten.

Pandas DataFrame.astype()
The astype() method is generally used for casting the pandas object to a specified dtype.astype() function.