• Adds support using more than one Column instance argument, i.e. as of now it’s only possible to use many str columns but onle one col(“mycol”).
• It also raises similar PySpark exception when column type is incorrect
• It also follows similar Apache PySpark API implementation logic.

NOTE: using exclude.append(**str**(col.expr)) does not work as it relies on ToString method which adds extra quotas for simple column names like “name” I.e '"name"' which causes that column to be omitted from drop function. Hence exposing GetName of the Expression. It can also be useful in other places.