cls_score.shape[1]

This code will return the number of columns in the variable `cls_score`.

Assuming `cls_score` is a NumPy array or a Pandas DataFrame, the code will look like this:

cls_score.shape[1]

The `.shape` attribute returns a tuple with the dimensions of the array or DataFrame, where the first element is the number of rows and the second element is the number of columns. By accessing the second element of the tuple (`[1]`), we get the number of columns.

For example, if `cls_score` is a NumPy array with 100 rows and 5 columns, `cls_score.shape[1]` will return `5`.