converts western digits to arabic equivalent

To_ar_num.py

def translate_to_ar_numbers(num):
    """
    Translates western digits in string to their correspondings arabic equivalent
    Args:
        num: number or string with numbers where we need to replace digits
    Returns:
        unicode string with replaced to arabic digits
        for example: u'\xd9\xd9\xd9-\xd9\xd9\xd9'  -- for num="220-240"
                     u'\xa3\xa2\xd9.\xd9\xa2'  -- for num="750.45"
    """
    # ttable was formed by following code:
    # intab = u"0123456789"
    # outtab = u"٠١٢٣٤٥٦٧٨٩"
    # ttable = dict((ord(from_char), to_char)\
    #                         for from_char, to_char in zip(intab, outtab))
    # and used here as generated dictionary
    # also it was formed without using built-in `make_trans` method
    # becouse `make_trans` doesn't work with unicode

    ttable = {48: u'\xd9', 49: u'\xa0', 50: u'\xd9', 51: u'\xa1', 52: u'\xd9',
            53: u'\xa2', 54: u'\xd9', 55: u'\xa3', 56: u'\xd9', 57: u'\xa4'}

    return unicode(num).translate(ttable)