如何使用特定的最后第 n 列获取熊猫中的每第 n 列？

Question

Using the function row[3::2] will return the row from every 2nd column starting from the 3rd column.

But how can you adjust it so it returns up to a certain column? That is, how can you adjust it so it only gets every 2nd column up to the nth column.

Answer 1

Slicing syntax is start: stop: step , so to return only up to a certain column you can use:

row[3:10:2]

It's also possible to chain indexers like this:

row[3:10][::2]