How to add a suffix (or prefix) to each column name?

Question

I want to add _x suffix to each column name like so:

featuresA = myPandasDataFrame.columns.values + '_x'

How do I do this? Additionally, if I wanted to add x_ as a suffix, how would the solution change?

Answer 1

Using a list comprehension:

df.columns = [str(col) + '_x' for col in df.columns]

If you want to learn more about list comprehension in Python then you can watch this Python Tutorial.