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Rename columns pandas4/11/2023 ![]() ![]() To rename the columns of a DataFrame in Pandas, you can use the DataFrame.rename() method. Say we simply wanted to lowercase all of our columns, we could do this using a mapper function directly passed into the. Rather than needing to pass in a dictionary of label mappings, you can apply the same mapping transformation to each column label. rename() method also allows you to pass in a mapper function directly into the mapper= parameter. Using a Mapper Function to Rename Pandas Columns Since the attribute represents the column labels, we can assign a list of values directly to that attribute to overwrite column names. It’s important to note here that we’re not reassigning this list to the DataFrame, but rather to the df.columns attribute. lower() method to change the string to its lowercase equivalent replace() string method to replace all spaces with underscores
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