localise_exceptions.py

# Python 3.
import traceback, sys, re

translations = r"""
ZeroDivisionError: division by zero
DK: division med 0
FR: division par zéro
ES: división por cero

AttributeError: '(\w+)' object has no attribute '(\w+)'
DK: '\1' objektet har ingen attribut '\2'
ES: No hay '\1' attribute '\2'
DE: '\1' hat keiner Attribute beim Name '\2'
FR: '\1' n'a pas d'attribut '\2'
"""

def _parse_messages():
    messages = []
    pattern = None
    translate_map = None
    for linx in translations.split('\n'):
        lin = linx.rstrip()
        if lin != '':
            if pattern is None:
                pattern = lin
                translate_map = {}
                messages.append((pattern, translate_map))
            else:
                lang, msg = lin.split(':', 1)
                msg = msg.lstrip()
                translate_map[lang] = msg
        else:
            pattern = None
            translate_map = None
    return messages
messages = _parse_messages()
del _parse_messages

def translate_line(line, language):
    if language is None:
        return line
    for pattern, translate_map in messages:
        if re.match(pattern, line) is not None and language in translate_map:
            return line.split(':',1)[0] + ': ' + re.sub(pattern, translate_map[language], line)
    else:
        return line

def translate(text, language):
    return '\n'.join(translate_line(line, language) for line in text.split('\n'))

def install_excepthook(language):
    def excepthook(type, value, tb):
        # print(traceback.format_exception(type, value, tb))
        print(translate('\n'.join(traceback.format_exception(type, value, tb)), language), file=sys.stderr)
    sys.excepthook = excepthook

def print_translated_tb(language):
    print(translate(traceback.format_exc(), language), file=sys.stderr)