What steps will reproduce the problem?
1. use Epson TM-T20
2. execute the following code
3.

What is the expected output? What do you see instead?
I would like to format a line to begin on the left with some words ("article" 
in my example) and then align on the right to write the price (15.00 € here)

What version of the product are you using? On what operating system?
python-escpos 1.0-1 on ubuntu 13.10

Please provide any additional information below.

code :
Epson.set("LEFT", "A", "", 1, 1)
Epson.text("Article 1")
Epson.set("RIGHT", "A", "", 1, 1)
Epson.text("15.00 \xd5")
Epson.text("\n")