rename() method

Renames one or more columns in a dataframe.

Syntax

dataframe_name.rename({"old_column_name":"new_column_name", "...n":"...n"}|dictionary_object)

Parameters

Name	Description
{"old_column_name" : "new_column_name", "...n" : "...n"}	A mapping between an existing column name and a new name that you want to apply to the column. Construct the mapping for one or more columns using a standard Python dictionary.
dictionary_object	A pre-existing dictionary object that maps one or more existing column names to new names. As an alternative to creating the column mapping inside rename(), you can create the mapping in a separate dictionary and specify only the dictionary name inside rename(). If you need to rename the same columns in multiple dataframes, this approach is more efficient.

Name

Description

{"old_column_name" : "new_column_name", "...n" : "...n"}

A mapping between an existing column name and a new name that you want to apply to the column.

Construct the mapping for one or more columns using a standard Python dictionary.

dictionary_object

A pre-existing dictionary object that maps one or more existing column names to new names.

As an alternative to creating the column mapping inside rename(), you can create the mapping in a separate dictionary and specify only the dictionary name inside rename(). If you need to rename the same columns in multiple dataframes, this approach is more efficient.

Returns

HCL dataframe.

Examples

Rename columns in a dataframe

You rename three columns in the accounts_receivable dataframe:

No becomes Customer Number
Date becomes Invoice Date
Due becomes Due Date

accounts_receivable_2 = accounts_receivable.rename({"No":"Customer Number", "Date":"Invoice Date", "Due":"Due Date"})

Rename columns in two dataframes using a pre-existing dictionary

You rename columns in two dataframes using the same dictionary object ( updated_col_names ) for both rename operations.

updated_col_names = {"No":"Customer Number", "Date":"Invoice Date", "Due":"Due Date"}
accounts_Jan_renamed = accounts_Jan.rename(updated_col_names)
accounts_Feb_renamed = accounts_Feb.rename(updated_col_names)