def __init__(self, app, config=None):
        """Initializes the Jinja2 object.

        :param app:
            A :class:`webapp2.WSGIApplication` instance.
        :param config:
            A dictionary of configuration values to be overridden. See
            the available keys in :data:`default_config`.
        """
        self.config = config = app.config.load_config(
            self.config_key,
            default_values=default_config,
            user_values=config,
            required_keys=None
        )
        kwargs = config['environment_args'].copy()
        enable_i18n = 'jinja2.ext.i18n' in kwargs.get('extensions', [])

        if 'loader' not in kwargs:
            template_path = config['template_path']
            compiled_path = config['compiled_path']
            use_compiled = not app.debug or config['force_compiled']

            if compiled_path and use_compiled:
                # Use precompiled templates loaded from a module or zip.
                kwargs['loader'] = _jinja2.ModuleLoader(compiled_path)
            else:
                # Parse templates for every new environment instances.
                kwargs['loader'] = _jinja2.FileSystemLoader(template_path)

        # Initialize the environment.
        env = _jinja2.Environment(**kwargs)

        if config['globals']:
            env.globals.update(config['globals'])

        if config['filters']:
            env.filters.update(config['filters'])

        if enable_i18n:
            # Install i18n.
            from webapp2_extras import i18n
            env.install_gettext_callables(
                lambda x: i18n.gettext(x),
                lambda s, p, n: i18n.ngettext(s, p, n),
                newstyle=True)
            env.filters.update({
                'format_date':      i18n.format_date,
                'format_time':      i18n.format_time,
                'format_datetime':  i18n.format_datetime,
                'format_timedelta': i18n.format_timedelta,
            })

        self.environment = env

 def test_ngettext_with_variables(self):
     self.assertEqual(i18n.ngettext('One foo %(foo)s', 'Many foos %(foo)s', 1), u'One foo %(foo)s')
     self.assertEqual(i18n.ngettext('One foo %(foo)s', 'Many foos %(foo)s', 2), u'Many foos %(foo)s')
     self.assertEqual(i18n.ngettext('One foo %(foo)s', 'Many foos %(foo)s', 1, foo='bar'), u'One foo bar')
     self.assertEqual(i18n.ngettext('One foo %(foo)s', 'Many foos %(foo)s', 2, foo='bar'), u'Many foos bar')
     self.assertEqual(i18n.ngettext('One foo %(foo)s', 'Many foos %(foo)s', 1) % {'foo': 'bar'}, u'One foo bar')
     self.assertEqual(i18n.ngettext('One foo %(foo)s', 'Many foos %(foo)s', 2) % {'foo': 'bar'}, u'Many foos bar')

    def __init__(self, app):
        config = app.config[__name__]
        kwargs = config['environment_args'].copy()
        enable_i18n = 'jinja2.ext.i18n' in kwargs.get('extensions', [])

        if 'loader' not in kwargs:
            template_path = config['template_path']
            compiled_path = config['compiled_path']
            use_compiled = not app.debug or config['force_compiled']

            if compiled_path and use_compiled:
                # Use precompiled templates loaded from a module or zip.
                kwargs['loader'] = jinja2.ModuleLoader(compiled_path)
            else:
                # Parse templates for every new environment instances.
                kwargs['loader'] = jinja2.FileSystemLoader(template_path)

        # Initialize the environment.
        env = jinja2.Environment(**kwargs)

        if config['globals']:
            env.globals.update(config['globals'])

        if config['filters']:
            env.filters.update(config['filters'])

        if enable_i18n:
            # Install i18n.
            from webapp2_extras import i18n
            env.install_gettext_callables(
                lambda x: i18n.gettext(x),
                lambda s, p, n: i18n.ngettext(s, p, n),
                newstyle=True)
            env.filters.update({
                'format_date':      i18n.format_date,
                'format_time':      i18n.format_time,
                'format_datetime':  i18n.format_datetime,
                'format_timedelta': i18n.format_timedelta,
            })

        self.environment = env

def DISPLAY_NAME_TOO_LONG_SHORTEN( length ): return ngettext( "It is too long. Please ensure it is maximum %(length)s character long.", "It is too long. Please ensure it is maximum %(length)s characters long.", length, length = length )

# forums
def POST_DELETED_DISPLAY(): return _( "[Deleted post]" )

def DISPLAY_NAME_TOO_SHORT_LENGTHEN( length ): return ngettext( "It is too short. Please ensure it is at least %(length)s character long.", "It is too short. Please ensure it is at least %(length)s characters long.", length, length = length )
def DISPLAY_NAME_TOO_LONG_SHORTEN( length ): return ngettext( "It is too long. Please ensure it is maximum %(length)s character long.", "It is too long. Please ensure it is maximum %(length)s characters long.", length, length = length )

def DISPLAY_NAME_WRONG_LENGTH( length ): return ngettext( "Your name is %(length)s character long.", "Your name is %(length)s characters long.", length, length = length )
def DISPLAY_NAME_TOO_SHORT_LENGTHEN( length ): return ngettext( "It is too short. Please ensure it is at least %(length)s character long.", "It is too short. Please ensure it is at least %(length)s characters long.", length, length = length )

def UNIT_DAY( nr ): return ngettext( "day", "days", nr )

# emails
def SEND_EMAIL_LOGIN_ATTEMPT_WITH_YOUR_EMAIL_NO_PW_SUBJECT(): return _( "Attempt to log in with your email" )

def UNIT_HOUR( nr ): return ngettext( "hour", "hours", nr )
def UNIT_DAY( nr ): return ngettext( "day", "days", nr )

def GAME_CONNECTION_TOKEN( token, minutes ): return ngettext( 'Your single-use game connect code is valid for <b>%(minutes)s minute</b>. <h1><b><font face="monospace">%(token)s</font></b></h1>', 'Your single-use game connect code is valid for <b>%(minutes)s minutes</b>. <h1><b><font face="monospace">%(token)s</font></b></h1>', minutes, minutes = minutes, token = token )
def NAME_NEEDED(): return _( "A name is needed" )

def UNIT_SECOND( nr ): return ngettext( "second", "seconds", nr )
def UNIT_MINUTE( nr ): return ngettext( "minute", "minutes", nr )

def PW_ENSURE_MIN_LENGTH( length ): return ngettext( "Please ensure your password is at least %(length)s character long.", "Please ensure your password is at least %(length)s characters long.", length, length = length)
def CURRENT_EMAIL(): return _( "This is your current email." )

def PW_TOO_SHORT( length ): return ngettext( "Your password is %(length)s character long: it is too short.", "Your password is %(length)s characters long: it is too short.", length, length = length )
def PW_ENSURE_MIN_LENGTH( length ): return ngettext( "Please ensure your password is at least %(length)s character long.", "Please ensure your password is at least %(length)s characters long.", length, length = length)

def POST_BODY_TOO_LONG( exceed ): return ngettext( "Your post is too long by %(exceed)s character.", "Your post is too long by %(exceed)s characters.", exceed, exceed = exceed )
def FAIL_THREAD_SUBMISSION(): return _( "Thread submission failed. Please try again." )

def THREAD_TITLE_TOO_LONG( exceed ): return ngettext( "Your thread title is too long by %(exceed)s character.", "Your thread title is too long by %(exceed)s characters.", exceed, exceed = exceed )
def POST_BODY_TOO_LONG( exceed ): return ngettext( "Your post is too long by %(exceed)s character.", "Your post is too long by %(exceed)s characters.", exceed, exceed = exceed )

 def test_ngettext(self):
     self.assertEqual(i18n.ngettext('One foo', 'Many foos', 1), u'One foo')
     self.assertEqual(
         i18n.ngettext('One foo', 'Many foos', 2), u'Many foos')

def UNIT_MINUTE( nr ): return ngettext( "minute", "minutes", nr )
def UNIT_HOUR( nr ): return ngettext( "hour", "hours", nr )

 def ngettext(self, singular, plural, n):
     return ngettext(singular, plural, n)

def DISPLAY_NAME_TOO_LONG_SHORTEN( length ): return ngettext( "It is too long. Please ensure it is maximum %(length)s character long.", "It is too long. Please ensure it is maximum %(length)s characters long.", length, length = length )

# forums
def FORUMS(): return _( "Forums" )