Remove substring only at the end of string

Question

I have a bunch of strings, some of them have \' rec\'. I want to remove that only if those are the last 4 characters.

So in other words I have

Answer 1

def remove_trailing_string(content, trailing):
    """
    Strip trailing component `trailing` from `content` if it exists.
    """
    if content.endswith(trailing) and content != trailing:
        return content[:-len(trailing)]
    return content