Question

Which of the following Python statements is used to change a column label in a DataFrame, df?

विकल्प

• df = df.rename({old_name : new_name}, axis=‘columns’)

• df = df.rename(old_name, new_name),axis=‘columns’

• df = df.change_name(old_name, new_name, axis=‘bar’)

• df = df.update({old_name : new_name}, axis=‘bar’)

Answer 1

df = df.rename({old_name : new_name}, axis=‘columns’)

Explanation:

In Pandas, the rename() function is used to modify column names in a DataFrame. Syntax: df = df.rename({old_name: new_name}, axis='columns')

• A dictionary in the form {old_name: new_name} is provided to rename selected columns.
• The parameter axis='columns' (or axis=1) indicates that the changes apply to column labels.