I would like to give some feedback about ...

From: http://www.checkio.org/mission/currency-style/solve/

checkmatch, 34, checkio, 59: find_message("$5,34")

I believe my answer to be correct but am given a fail. It works on my local machine.

HTTP_USER_AGENT:

Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:41.0) Gecko/20100101 Firefox/41.0

import re
from string import maketrans

class MatchError(AssertionError):
    pass

def checkmatch(match):
    itable = ',.'
    otable = '.,'
    trantable = maketrans(itable, otable)
    original = str(match)
    try:
        match = match.lstrip('$')
        if match.endswith('.'):
            suffix = '.'
        elif match.endswith(','):
            suffix = ','
        else:
            suffix = ''
        match = match.rstrip('.').rstrip(',')
        if match.count('.') > 1 and match.count(',') > 1:
            raise MatchError
        if match.find(',') != -1:
            if match.find('.') != 0:
                if match.find('.') < match.find(','):
                    return '$' + match.translate(trantable) + suffix
                else:
                    raise MatchError
            else:
                if len(match.split(',')[-1]) == 2:
                    return '$' + match.translate(trantable) + suffix
                else:
                    raise MatchError
        elif match.find('.') != -1:
            if len(match.split('.')[-1]) == 3:
                return '$' + match.translate(trantable) + suffix
            else:
                raise MatchError
        else:
            raise MatchError
    except MatchError:
        return original

def checkio(format_string):
    pattern = re.compile(r'\$[0-9,.]*')
    matches = pattern.findall(format_string)
    matches = tuple([checkmatch(m) for m in matches])
    format_string = pattern.sub('%s', format_string)
    return unicode(format_string %(matches), 'utf-8')