python: get file path and create a new file in the same directory

So I know how to get a location of the needed file, I'm doing this with

file_name = os.path.splitext(os.path.basename(file_full_name))[0] 

but what I need to do is:

1. Get the file name, which I have
2. Get path of the file, which I also know how to get
3. Create a file in the same directory with a modified name, for example lets say I have a file called "data.csv" on Desktop. I would need to create a file called "data - results.csv" to Desktop.

I have only tried printing the new name, but the only result I have got with this code:

 myresultcsvfile = os.path.splitext(os.path.basename(file_name))[0] + " - results.csv" 

is this:

myfile: ('Book1 - Copy', ' - results.csv') 

I'm clearly doing something wrong but I cant figure out what. And that's just the file name, I also need to add full path of the parent file to it (so that the end result would be "C:\users[username]\desktop\Book1 - copy - results.csv" in this case)