dataframe.loc[]

`dataframe.loc[]` is a method used to access a group of rows and columns in a pandas DataFrame. It allows selection of rows and columns by label or a boolean array.

For example, if we have a DataFrame called `df` and we want to select rows with label 'A' and columns 'X' and 'Y', we can use the following code:

df.loc['A', ['X', 'Y']]

This will return a new DataFrame with the rows and columns specified.

Alternatively, we can use boolean indexing with the `loc` method to select rows based on a condition. For example, if we want to select all rows where the value in column 'X' is greater than 10, we can use the following code:

df.loc[df['X'] > 10]

This will return a new DataFrame with only the rows where the condition is True.