Control a dot matrix printer

[Clement_2000]

I'm a bit confused,
I want for example to send 27 120 0 to set it in Utility mode.
When I do :

printer = open("LPT1", "w")
printer.write("\x27\x120\x0")
printer.close

It says I can't use more that two numbers:

Error:
File "C:\Documents and Settings\Administrateur\Bureau\test.py", line 2
    printer.write("\x27\x120\x0")
                 ^
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 9-11: truncated \xXX escape

And when I do :

printer = open("LPT1", "w")
printer.write(chr(27), chr(120), chr(0))
printer.close

It obviously tells me that printer.write takes only one argument and that I gave 3 of them.