In this context it's a specific class, DataFrame, in the pandas library: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.html https:

In this context it's a specific class, DataFrame, in the pandas library: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.html https://pandas.pydata.org/pandas-docs/stable/reference/api/p... > Two-dimensional, size-mutable, potentially heterogeneous tabular data. > Data structure also contains labeled axes (rows and columns). Arithmetic operations align on both row and column labels. Can be thought of as a dict-like container for Series objects. The primary pandas data structure.