human
Solve the following python programming problem given the following code:
def install(domain, lazy = False) : 
    "Install a _() function using the given translation domain.

    Given a translation domain, install a _() function using gettext's
    install() function.

    The main difference from gettext.install() is that we allow
    overriding the default localedir (e.g. /usr/share/locale) using
    a translation-domain-specific environment variable (e.g.
    NOVA_LOCALEDIR).

    :param domain: the translation domain
    :param lazy: indicates whether or not to install the lazy _() function.
                 The lazy _() introduces a way to do deferred translation
                 of messages by installing a _ that builds Message objects,
                 instead of strings, which can then be lazily translated into
                 any available locale.
    " 
    if lazy : 
        def _lazy_gettext(msg) : 
            'Create and return a Message object.

            Lazy gettext function for a given domain, it is a factory method
            for a project/module to get a lazy gettext function for its own
            translation domain (i.e. nova, glance, cinder, etc.)

            Message encapsulates a string so that we can translate
            it later when needed.
            ' 
            return Message (msg, domain = domain) 
from six import moves 
        moves.builtins.__dict__ ['_'] = localedir 
else : 
        localedir = ('%s_LOCALEDIR' % domain.upper ()) 
        if six.PY3 : 
            gettext.install (domain, localedir = os.environ.get (localedir)) 
else : 
            gettext.install (domain, localedir = os.environ.get (localedir), unicode = True) 

    
    

    Fix the buggy line: moves.builtins.__dict__ ['_'] = localedir
assistant
#Here is Python code to fix the buggy line: moves.

moves.builtins.__dict__ ['_'] = def _lazy_gettext(