by this module you can correct your text shape an direction. just install pips and use it.

# install: pip install --upgrade arabic-reshaper
import arabic_reshaper

# install: pip install python-bidi
from bidi.algorithm import get_display

text = "ذهب الطالب الى المدرسة"
reshaped_text = arabic_reshaper.reshape(text)    # correct its shape
bidi_text = get_display(reshaped_text)           # correct its direction

Your code is correct as it works on my computer with both Python 2 and 3 (I'm on OS X):

~$ python -c 'print "تست"'
تست
~$ python3 -c 'print("تست")'
تست

The problem is with your terminal that can not output unicode characters. You could verify it by redirecting your output to a file like python3 my_file.py > test.txt and open the file using an editor.

If you are on Windows you could use a terminal like Console2 or ConEmu that renders unicode better than Windows prompt.

You may encounter errors with these terminals too because of wrong code-pages/encodings of Windows. There is a small python package that fixes them (sets them correctly):

1- Install this pip install win-unicode-console

2- Put this at the top of your python file:

try:
    # Fix UTF8 output issues on Windows console.
    # Does nothing if package is not installed
    from win_unicode_console import enable
    enable()
except ImportError:
    pass

If you got errors when redirecting to a file, you may fix it by settings io encoding:

On Windows command line:

SET PYTHONIOENCODING=utf-8

On Linux/OS X terminal:

export PYTHONIOENCODING=utf-8

Some points

• There is no need to use u"aaa" syntax in python 3. Strings literals are unicode by default.
• Default coding of files is UTF8 in python 3 so coding declaration comment (e.g. # -*- coding: utf-8 -*-) is not needed.

You have correct results in list with byte strings:

>>> lst = ['\xd9\x88\xd8\xb1\xd9\x88\xd8\xaf',
           '\xd9\x85\xd9\x85\xd9\x86\xd9\x88\xd8\xb9']
>>> for l in lst:
...  print l
... 
ورود
ممنوع

to convert it to unicode you can use list comprehantion:

>>> lst = [e.decode('utf-8') for e in lst]
>>> lst
[u'\u0648\u0631\u0648\u062f', u'\u0645\u0645\u0646\u0648\u0639']

Printing Unicode Char inside a List

Your second loop is operating over tuples of unicode (product yields a single product at a time as a tuple), not individual unicode values.

While print uses the str form of the object printed, tuple's str form uses the repr of the contained objects, it doesn't propagate "str-iness" (technically, tuple lacks __str__ entirely, so it's falling back to __repr__).

If you want to see the Arabic, you need to print the elements individually or concatenate them so you're printing strings, not tuple. For example, you could change:

print ran[I]

to something like:

print u', '.join(ran[I])

which will convert to a single comma-separated unicode value that print will format as expected (the str form), rather than using the repr form with escapes for non-ASCII values.

Side-note: As a point of style (and memory use), use the iterator protocol directly, don't listify everything then use C-style indexing loops. The following code has to store a ton of stuff in memory if the inputs are large (the total size of the output is the multiplicative product of the lengths of each input):

ran=list(itertools.product(*arabicconvertedwords))
for I in range(len(ran)):
    print u', '.join(ran[I])

where it could easily produce just one item at a time on demand, producing results faster with no memory overhead:

# Don't listify...
ran = itertools.product(*arabicconvertedwords)
for r in ran:  # Iterate items directly, no need for list or indexing
    print u', '.join(r)

As noted in the comments, it is not a trivial task display UTF-8 Arabic text correctly on an embedded device. You need to handle text direction, joining and character encoding.

I've had an attempt at this in the past for a PHP ESC/POS driver that I maintain, and was unable to get joined Arabic characters in native ESC/POS. However, I did end up settling on this workaround (PHP) that printed images instead.

The basic steps to working around this are:

• Get an Arabic font, some text libraries, and an image library
• Join ('reshape') the characters
• Convert the UTF-8 to LTR (print) order, using the bidi text layout algorithm
• Slap it on an image, right aligned
• Print the image

To port this to python, I lent on this answer using Wand. The Python Image Library (PIL) was displaying diacritics as separate characters, making the output unsuitable.

The dependencies are listed in the comments.

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Print an Arabic string to a printer.
# Based on example from escpos-php

# Dependencies-
# - pip install wand python-bidi python-escpos
# - sudo apt-get install fonts-hosny-thabit
# - download arabic_reshaper and place in arabic_reshaper/ subfolder

import arabic_reshaper
from escpos import printer
from bidi.algorithm import get_display
from wand.image import Image as wImage
from wand.drawing import Drawing as wDrawing
from wand.color import Color as wColor

# Some variables
fontPath = "/usr/share/fonts/opentype/fonts-hosny-thabit/Thabit.ttf"
textUtf8 = u"بعض النصوص من جوجل ترجمة"
tmpImage = 'my-text.png'
printFile = "/dev/usb/lp0"
printWidth = 550

# Get the characters in order
textReshaped = arabic_reshaper.reshape(textUtf8)
textDisplay = get_display(textReshaped)

# PIL can't do this correctly, need to use 'wand'.
# Based on
# https://stackoverflow.com/questions/5732408/printing-bidi-text-to-an-image
im = wImage(width=printWidth, height=36, background=wColor('#ffffff'))
draw = wDrawing()
draw.text_alignment = 'right';
draw.text_antialias = False
draw.text_encoding = 'utf-8'
draw.text_kerning = 0.0
draw.font = fontPath
draw.font_size = 36
draw.text(printWidth, 22, textDisplay)
draw(im)
im.save(filename=tmpImage)

# Print an image with your printer library
printer = printer.File(printFile)
printer.set(align="right")
printer.image(tmpImage)
printer.cut()

Running the script gives you a PNG, and prints the same to a printer at "/dev/usb/lp0".

This is a standalone python-escpos demo, but I'm assuming that Odoo has similar commands for alignment and image output.

Disclaimer: I don't speak or write Arabic even slightly, so I can't be sure this is correct. I'm just visually comparing the print-out to what Google translate gave me.